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200,011 | Forward Application IP/host to localhost (windows) | I'm working on a windows XP / win 7 environment and i have an application (game) that connects to an static hostname and ip. It does have a connection to 2 ports (ports 5000TCP&UDP and 6000TCP). I have a local server running on same 2 ports working. There is anyway, apart from editing hosts files, to forward the applic... | It would be the simplest solution to just edit the HOSTS files. There is no out-of-the-box solution for. You might configure a DNS instance to point the NS Entry to localhost. But this would just be more complicated and would not bring any advantage. Also this would require users with the ability to change the DNS serv... | 0 | 2 | 240 | 2010-11-09T19:17:56.220 | api_errors | serverfault.com | |
175,262 | Apache ModRewrite not working with foo.com, but works with www.foo.com | I can't get the RewriteCond %{HTTP_HOST} to trigger when I just use foo.org. It just seems to ignore it, but www.foo.org and sub.foo.org seem to trigger the rewrite condition. I'm probably missing something simple, and was hoping some more experienced eyes would be able to help. [CODE] I've tried these 3 settings (repl... | Try to enable mod_rewrite debug with the following directive. RewriteLog RewriteLogLevel Start at level 3 and show us the result. Also please add your apache version. | 1 | 1 | 93 | 2010-08-27T13:36:05.190 | infrastructure | serverfault.com | |
683,159 | service in vagrant VM not picking up configuration | I want to setup a Vagrant configuration to create and launch an Ubuntu guest VM which will launch a [CODE] service within the VM after [CODE] . I'd like for this to work on Windows, Mac, and Linux hosts. I have a [CODE] file which I copy to the VM during provisioning (by copying to user space first and then copying to ... | Okay, this post let me know that I could emit any upstart event I wanted as the final step in my Vagrantfile: [CODE] And I could trigger restarting the supervisord service with the [CODE] event: [CODE] And my provisioning script is: [CODE] This setup ensures that the supervisord service restarts after the file [CODE] i... | 1 | 2 | 531 | 2015-04-16T10:17:24.197 | infrastructure | serverfault.com | |
1,033,421 | how to keep "Received" header on only content_filter? | I have registered content_filter in the submission of master.cf. But I can't find the "Received" header in the content filter due to the settings below. I need to get "authenticated user" from "Received" from the content filter. https://askubuntu.com/questions/78163/when-sending-email-with-postfix-how-can-i-hide-the-se... | Delete the no_header_body_checks from receive_override_options so it works as desired. | 0 | 0 | 515 | 2020-09-10T23:04:53.797 | infrastructure | serverfault.com | |
700,395 | Inconsistent dns aswer | I'm trying to understand how DNS works. I use nslookup for that purpose. But there are some doubts i have. I'm getting different results using different ns servers. For example when i ask for "abc.com" using "dns.server1.pl" i'm getting "233.66.8.9" but when i use "dns.server2.de" i'm getting "121.26.28.50" I'm getting... | Different IP for the same host are used to split network traffic eg. from different traffic and direct it to local servers. There are several server mirroring methods. Some of them use explicit redirects from main host do mirror hosts, and some other (eg. mirror.centos.org) implicitly use different IPs for the same hos... | -2 | 1 | 729 | 2015-06-20T07:09:09.213 | infrastructure | serverfault.com | |
127,461 | Subquery in MS Query doesn't work | I'm a beginner in SQL. I hope my question is not too stupid. I'm trying to write a query in MS Query and want to see the results in Excel. The problem is that MS Query doesn't accept my code. I get the message: table '(select' couldn't be added. Here's the code: [CODE] What is wrong? I have to see the content of table ... | Your query can be simplified (regardless of [CODE] flavor) not to use an inner query (subselect). This is not tested, but it should be closer to what you need: [CODE] Since all [CODE] s are [CODE] , you can just select from one of the tables and [CODE] with each of the others using your criteria. Also, [CODE] condition... | 3 | 1 | 635 | 2016-01-27T11:19:18.333 | warehouse_errors | dba.stackexchange.com | |
416,404 | Tomcat's Index page showing on site when browsed by IP | I have a Tomcat 5.0.27-2 server (I know... old) and Apache 2.0.46-77 server running and serving apps up just fine currently. The problem we are experiencing is that if I navigate to http://www.mysite.com/index.jsp , I see the expected JSP. However, if i navigate to (broken up for posting purposes) http:// 1.2.3.4 /inde... | This can happen when you have Tomcat answering on the host's IP address itself, rather than on 127.0.0.1. If what you are aiming to do is have Apache act as your front door and proxy all requests to Tomcat, then you should make Tomcat bind to localhost, not to the host's IP address. Then you can use [CODE] to forward r... | 0 | 0 | 1,071 | 2012-08-10T19:30:49.487 | infrastructure | serverfault.com | |
375,597 | Pattern Matching in OO code | I have a situation where I need to model objects that don't share common attributes but represent same logical entity. Now, based on their type they will have different attributes (properties). To keep an example code simple & easy to understand, let's say we have [CODE] & [CODE] validation results. When validation res... | Not everything has to be perfectly object-oriented, even if you have to call nearly everything a [CODE] in C#. Your first design is a reasonable approximation of an union in C#. You could make it slightly safer by preventing other implementations of the validation result interface, e.g. by using a base class with an in... | 2 | 2 | 357 | 2018-07-21T11:53:55.147 | data_quality | softwareengineering.stackexchange.com | |
588,946 | Nginx and multiple applications | I am new to nginx, and here what I am trying to achieve : I have only one domain name. I want to have several applications, accessible with something like : mydomain.com/app1 mydomain.com/app2 etc So I ended up with a configuration like this : [CODE] However, I only got 403 error. My directories are owned by the nginx ... | Check the error log, it will show you why it outputs 403 error. Alias does replacements on URL, not on server paths. Use [CODE] directive instead for what you want to do. Remove the ~ in the location definition, aka [CODE] instead of [CODE] , it has better performance and can avoid some other kind of issues. Only use ~... | 0 | 0 | 110 | 2014-04-14T18:15:43.003 | api_errors | serverfault.com | |
276,734 | DNS setup for machine with an IP on two vlans | We have a server that needs to live on two vlans at the same time. It manages our physical security infrastructure, collecting information from cctv cameras, keyfob readers, and door sensors via one vlan, and allowing client software installed on users machines on a different vlan to report from this information and ma... | You'll want to set up split horizon DNS. This allows your name server to return a different IP address depending on the IP or network of the machine asking. | 1 | 2 | 1,080 | 2011-06-03T14:58:33.963 | airflow_errors | serverfault.com | |
567,760 | ntpdate failing "Name or service not known" | I've got a NAS that is Linux-based (Linux version 2.6.32.11-svn70860) and it is not able to set its time using ntp. The previous SysAdmin is long gone so I have no idea whether this problem just started happening, or whether it's been this way for years. I'm also contacting the manufacturer, but don't have a lot of con... | Solution: The folks in charge of our DNS server had to enable recursion. | 2 | 1 | 20,694 | 2014-01-16T16:33:32.343 | infrastructure | serverfault.com | |
420,795 | HighPoint RocketRAID 2680SGL and FreeBSD | I'm trying to get my RAID controller working with FreeBSD. But it seems it's not being recognized by FreeBSD: [CODE] I'm a bit clueless on how to get it fixed. The server is a HP HDPC with a Pentium D. | HighPoint has not released documents or source code for a driver, but do provide an old binary distribution. It can be downloaded from their website . It's for FreeBSD 7.0, and others have reported it as broken for 7.2+. It's probably not what you want to hear, but I'd recommend using a Adaptec or LSI based controller ... | 3 | 2 | 539 | 2012-08-24T13:15:56.357 | infrastructure | serverfault.com | |
911,223 | RDS: Client not connecting to session host, direct connect works fine | Environment Fully patched Windows 7 Client Fully patched Server 2012R2 Environment RDS-Deployment with two HA connection brokers, three session hosts, one WA host externally available RDS gateway, connection is made from within the company network though Client and RDS environment on different networks, connected via I... | After removing the machine from the domain, rejoining and various other tests, I just solved it by removing the "workspacesid"-line from the RDP file. I can now connect just fine Unfortunately, I can't find any detailed documentation from microsoft on this, but I'll still mark as solved. | 0 | 1 | 3,580 | 2018-05-08T09:21:53.320 | pipeline_ops | serverfault.com | |
233,567 | How to set file/folder permissions using Rsync from Windows to Linux | I want to transfer lots of files/folders from Windows to Linux using Rsync. On linux server(destination), I want the file permission set to 644, and folder permission set to 755. If possible, I want the ownership set to root.root for all the files/folders. I have tried -p option, but it doesn't work. Thank you for any ... | You can set the perms using the [CODE] parameter e.g. [CODE] will force the permissions to be set to 755 for [CODE] irectories and 644 for [CODE] iles. | 19 | 36 | 38,905 | 2011-02-09T21:40:01.863 | infrastructure | serverfault.com | |
1,003,610 | Azure Network Interface physical MAC address | I am trying to run some third-party software on an Azure Linux VM but their licensing is tied to the MAC address. The private and public IPv4 IP addresses of the Network Interface for the VM are both static. But, the MAC address I get starts with 00-0D and the software provider is telling me that is a "pure virtual" MA... | This is a VM (Virtual Machine), it will NOT have a physical MAC address. You will need to go back to the vendor and tell them that is the only MAC address the machine has. | 1 | 1 | 5,735 | 2020-02-18T20:02:02.910 | infrastructure | serverfault.com | |
116,656 | MOSS2007 Giving Error: Access Denied to all users | Over night our installation of MOSS seemed to have stopped working. For ever user it is asking for credentials. You log in with the credentials and then you get the Access Denied error. This is happening for everyone. Any ideas what could be wrong? | I have the same problem. No one but Site collection administrator could login. My problem was that my masterpage has not been approved. This article helped me to start with the troubleshooting. http://blog.tylerholmes.com/2008/02/troubleshooting-access-denied-errors-in.html | 2 | 1 | 2,216 | 2010-02-25T09:36:05.630 | infrastructure | serverfault.com | |
303,669 | How to actually use mysql slave as soon the master is failover or got burnt | I have MySQL master-slave replication that works fine; I googled the whole net and MySQL site to find the standard procedure to make use of the replication but found nothing. It is as if admins are happy to have replication on, but when the time comes to perform a disaster recovery no initial plan has been put into pra... | For a DR solution you most likely want a semi-manual process. That is, you need to decide the disaster validates a full DR failover and it's not just a small network blipp and you're stuck with days of fail-back work. To switch a MySQL slave to a master you just issue a few commands in mysql, Mysql details can be found... | 12 | 12 | 38,810 | 2011-08-22T07:42:40.433 | database_errors | serverfault.com | |
332,533 | Why password return null for table master.. sys.logins? *SQL Server | I have made comparison between two sql servers on my environments A - SQL SERVER 2016 - Passowrd return value B - SQL SERVER 2019 - Password is null Is there any setting to check. Thank you in advance | Why password return null Storing passwords is bad security practice. If you store the password, and someone manages to hack your database and steal the passwords, they will try using the password to login to other services. And if some user uses the same password for multiple accounts, they will inevitably get hacked. ... | 0 | 0 | 276 | 2023-10-26T10:24:03.383 | database_errors | dba.stackexchange.com | |
407,979 | Installing php5-imagick in Ubuntu 12.04 w/ ondrej packages results in dependency error | I've been trying to setup an Ubuntu 12.04 VM that is running PHP 5.4 with the imagick module. All the results I find on google say to use the ondrej packages , which for the most part works perfectly. All the major modules install and run exactly the way they should, but when I try to install imagick it tells me I'm mi... | I finally resolved this last night by downloading the package manually from the ondrej repo and installing it with dpkg: [CODE] Update: package not found 404,this is correct address: https://launchpad.net/~ondrej/+archive/ubuntu/php5-oldstable/+files/php5-imagick_3.1.0%7Erc2-1%7Eprecise%2B1_amd64.deb | 3 | 4 | 3,276 | 2012-07-15T23:49:45.760 | infrastructure | serverfault.com | |
93,005 | methods of prevent a user (or group) to be able to login | is the only method to prevent a user from logging into the server setting the users shell to /dev/null? | Another alternative to using [CODE] would be to use [CODE] and delete the user's password. | 1 | 2 | 434 | 2009-12-10T13:43:00.577 | infrastructure | serverfault.com | |
165,683 | Removing an element not currently in a list: ValueError? | This is something that's bothered me for a while, and I can't figure out why anyone would ever want the language to act like this: [CODE] If the value is already not in the list, then I'd expect a silent success. Goal already achieved. Is there any real reason this was done this way? It forces awkward code that should ... | From the Python philosophy : Explicit is better than implicit The [CODE] method has raised an exception from the very first commit ; trying to remove a value that is not there gives you explicit feedback instead of implicitly assuming that the value not being there was fine and what you wanted all along. | 6 | 4 | 9,581 | 2012-09-21T14:24:51.243 | data_quality | softwareengineering.stackexchange.com | |
793,411 | WebLogic server seems to freeze after CMS Garbage Collection run | We're using Java Hotspot 1.6 with a 10.3.6 WebLogic Cluster with 2 nodes running OSB 11.1.1.7 behind a physical load balancer: [CODE] We've tuned the JVM to use CMS and avoid long running garbage collections: [CODE] Most of the pause phases of the GCs (initial mark and remark) take less than a second, we don't see any ... | After a long investigation we finally found the cause of the problem, while the CMS GC was running, we took several thread dumps and found this conspicuous stack in 5 or 6 threads: [CODE] The execution of this code was present in the same thread in dumps taken 20-25 seconds apart, so it seemed a very good suspect. Afte... | 0 | 2 | 1,062 | 2016-08-02T15:44:35.027 | database_errors | serverfault.com | |
56,845 | MYSQL joining 3 tables with left join | I have these tables: [CODE] and i did this query: [CODE] But the problem is, the correct result i would have to get it would be: And i get: The problem is that multiplicate the number of class qualifications and the misses (17x6(2 misses, 1 delay, 1 attitude and 2 misses_just)=102)) and i don´t want that. I want the co... | I suggest you first read this question and answer Help with this query . Then try to rewrite your queries using Option 3 (or all of the options). The following is a first attempt at option 1: [CODE] | 2 | 1 | 1,144 | 2014-01-15T19:27:42.260 | database_errors | dba.stackexchange.com | |
938,860 | appx via task sequence to Windows 10 LTSB? | Issue with Windows 10 LTSB only. Appx deploys using application but not using task sequence. Wondering if anyone has been able to deploy appx via task sequence to Windows 10 LTSB successfully? | Appx packages are installed per user and therefore can't be installed via a task sequence. I've tried in the past to install the Appx using Powershell & DISM as part of a task sequence but neither method worked. Check this link under the Install Application section: https://docs.microsoft.com/en-us/previous-versions/sy... | 0 | 1 | 1,148 | 2018-11-06T17:38:43.287 | infrastructure | serverfault.com | |
71,551 | Predict a sequence given many sequences | I'm trying to find an algorithm that would fit this use case: My data: a bunch of fixed-size integer arrays, e.g. [CODE] Input: an array of integers, and output: prediction for the rest of the array, e.g. [CODE] | So, the question is how to model the following problem: input a sub section of a sequence, then output the rest of the sequence. This is a sequence-to-sequence problem. For this, as Derek O has eluded to, I would suggest a encoder-decoder architecture. In the encoder, you would encode your input sequence (using RNN/LST... | 5 | 1 | 257 | 2020-04-01T14:42:42.917 | data_quality | datascience.stackexchange.com | |
472,458 | Adding .CMD Files to Path in System Environment Variables settings? | I would like to run a bunch of .CMD files from anywhere on my server. However, when I add the path that these files are in to my PATH in System Environment Variables, they don't run. I can run them if I go to the actual folder, however. I am trying to make the following directory globally accessible: C:\Amazon\IAMCli-1... | I see spaces on the C:\Amazon entries. Try removing those first. If it's comma-delimited, the spaces might change the PATH from "C:\Amazon..." to " C:\Amazon..." which can be entirely different. | 4 | 1 | 468 | 2013-01-25T17:52:17.963 | database_errors | serverfault.com | |
172,562 | Optimize architecture for SQL Server projects | I often find myself hacking together multiple [CODE] files for a project and calling them one after the other through Task Scheduler. Everything I know about SQL is self-taught, so I don't know anything about useful shortcuts and best practices. I imagine there has to be a more elegant way to do what I do. Example Righ... | You could create a script outside SQL Server (Powershell, VBScript, console app) which does away with your text files. The script would read input data from SQL, call the external utility and write the result directly back to the database. If it was something written in C# then you have all the handy source control, au... | 2 | 0 | 111 | 2017-05-02T23:05:37.037 | database_errors | dba.stackexchange.com | |
58,575 | XEn server and san | I explain the situation I would create a volume (Mon) 4 server share on this part is successful with (multiple host access) but the second part is the problem i try to have my real-time synchronization of files. I add a file to the volume of a particular server and would like to access it from another server but it imp... | Standard filesystems (NTFS, FAT, EXT3-2, ...) cannot be accessed by multiple nodes at a time. They are meant to be accessed by a single node and are therefore simpler. If you need a filesystem to be available by several nodes at block level, you should consider GFS or OCFS. If you need a filesystem to be available by s... | 0 | 2 | 484 | 2009-08-25T17:48:13.110 | infrastructure | serverfault.com | |
263,106 | Site getting "Error establishing a database connection" for past 19 hours | My site is running in wordpress, it was running fine for past 3 months. Yesterday suddenly my site showed "Error establishing a database connection". I have not changed anything in the site.I contacted my host and they don't know to fix the error. my site lost all traffic. | Do you have access to the server via ssh? If you do then check if your database is running and that you can connect to it from the command line. Edit: The error message is very clear. As you mentioned you don't have access and the provider said he is working on it. How would serverfault be able to help you? Is your pro... | -2 | 1 | 541 | 2011-04-25T13:50:26.263 | infrastructure | serverfault.com | |
782,070 | WordPress can't install plugin even file permission is correct | I have apache2 server, of course apache2 is running on [CODE] account. All my WordPress files is own by [CODE] , and have the [CODE] permission. Three of the accounts in [CODE] group are [CODE] , [CODE] , and [CODE] itself. The permission thing seems to be really, really good. Here are the copied text from the terminal... | Try changing the owner of the plugins directory to [CODE] temporarily. The permission check is done by parsing the directory listing. Changing the group to [CODE] may work. | 0 | 0 | 278 | 2016-06-05T13:07:07.767 | infrastructure | serverfault.com | |
419,978 | haproxy: retain existing sessions under high load, serve '503' to new arrivals | Trying to do what it says in the title: retain existing sessions under high load, and serve 503-message to newly arrived visitors. Problem: it works, but the sessions don't last beyond about 90 seconds. Current results have me wondering if there's a time-out setting I'm missing. Purpose I'm trying to get haproxy to: se... | Unfortunately, you appear to be completely confusing connections with application-level sessions. A user visiting the site might have a cookie which makes you think he owns a connection while it's not necessarily the case. He might open as many connections as needed to fetch objects and navigate pages. The 90 seconds y... | 12 | 4 | 1,702 | 2012-08-22T10:35:26.077 | api_errors | serverfault.com | |
354,317 | sendmail problems | I am using sendmail to send emails through a PHP script. The emails go fine except for a few domains for which, when I run the command sendmail -q -v, it gives the following error: Deferred: 421 invalid sender domain ( misconfigured DNS ) I also see lot of messages queued when I run the command sendmail -bp. Can someon... | I bet some of the receiving servers demand that your DNS also provides a "SPF" record for your mail domain. See: How to set SPF record? | 1 | 0 | 507 | 2012-01-27T17:45:47.160 | infrastructure | serverfault.com | |
610,874 | Copying files from local server to remote server using powershell | Apologies if this has already answered directly or indirectly in SF. My requirement will be as follows: Move a deployment folder that has got files and subdirectories to a remote sever. Pass credentials that will be required for the remote server. I used 'Start-BitsTransfer' and 'copy-item' commands along with 'new-pss... | You can create a PSDrive [CODE] THe PSDrive only exists during your powersehll session. If you want to tranfer data through powershell remoting see this post https://stackoverflow.com/questions/4225748/how-do-i-pass-named-parameters-with-invoke-command | 4 | 1 | 11,553 | 2014-07-08T08:52:58.483 | api_errors | serverfault.com | |
909,604 | Heroku and Godaddy don't want working together | 1) I have an app on heroku.com, code-w.herokuapp.com (works fine). 2)I have a domain, that I bought: gamakers.org. 3)I have done all that described in here: https://stackoverflow.com/questions/14125175/setup-heroku-and-godaddy 4) I have got no result. When I open gamakers.com, it says: This website is temporarily unava... | First, you need to set up the non-www variant of the domain to the www variant. GoDaddy has something for this (just make sure you're doing it only to the non-www record): https://ph.godaddy.com/help/manually-forward-or-mask-your-domain-or-subdomain-422 Second, you can't just CNAME to your app's herokuapp.com subdomain... | 0 | 2 | 3,581 | 2018-04-26T17:47:54.823 | bi_errors | serverfault.com | |
262,087 | Concat digits into xxx-xxx form | Example, I get data from eclipse and insert into 'abc' table. so, now how I can get the data from the 'abc' table and concat the digit? Example: I enter 123456 then in SQL need to concat into format 123-456 I created procedure and alter procedure. I can insert but I can't select and concat and insert. I want it to be i... | I'm a little confused about what you're really trying to do. Your [CODE] procedure has a rogue [CODE] in it which would error. Your [CODE] statement should simply be: [CODE] Now, if you're wanting to change the data that's already the table, use [CODE] . [CODE] Or if you're wanting to insert a new row that's concatenat... | -1 | 1 | 165 | 2020-03-17T05:38:34.853 | warehouse_errors | dba.stackexchange.com | |
353,039 | Why are SQL Server pages 8 KB? | According to Mark Russinovich's Windows Internals 5th Edition, Windows uses (small) page sizes of 4 KB on both x86 and x64 architectures to manage memory. Even though I can't find a reason for this, intuitively I'd think SQL Server would use the same size for its own pages but instead it uses page sizes of 8 KB. I've r... | My first thought would be something related to disk storage, but I'm not sure since I think NTFS has a cluster size of 4KB also. No, it has a cluster size that is configurable and any sql server DBA with a grain of salt has put it to 64kb for the database file partitions. As far as I know, Windows itself uses (small) p... | 3 | 2 | 2,816 | 2012-01-24T10:33:35.047 | database_errors | serverfault.com | |
806,014 | Need explanation of option ethtool -K | I did rsync -av --rsh=ssh ... and catch error Corrupted MAC on input. Packet Corrupt I found solution here ethtool -K eth0 tx off rx off This option disabled TCP checksum of ethernet adapter. But what does it mean, processor is responsible of TCP checksum now? If I off TCP checksum permanently for ethernet adapter, it ... | If you disable TCP checksum offloading, it will need to be carried out at a higher level. This will put put additional load on the higher level processor. As to it's consequence, that depends upon the spec of the system and the work it it doing, I don't think we can give any reasonable assurances here. I would make the... | 1 | 1 | 830 | 2016-09-29T06:50:33.677 | data_quality | serverfault.com | |
503,887 | Can't start MYSQL after changing directories | So I started running out of space on my linux hard disk. I added another hard drive and now I want to change the MySQL directories. So instead of saving the data into the old hard drive, it saves it into the new hard drive. The new hard drive is mounted as /Data/ I looked several ways to do it, and I followed each and ... | In the my.cnf you need to add the socket path in two places: In the [mysql] and in the ->[client] Here is a typical global option file: [client] port=3306 socket=/tmp/mysql.sock [mysqld] port=3306 socket=/tmp/mysql.sock | 1 | 3 | 13,490 | 2013-04-30T14:10:56.677 | database_errors | serverfault.com | |
323,113 | Renaming files on the remote network drive | I have a couple of remote windows servers to which I have a very slow connection. It is always a pain to copy a file there. But renaming files works much faster. Is it because a transfer protocol recognizes a "rename" command and can do rename operation in-place, without actually deleting and re-coping the whole file a... | To rename a file the operating system merely updates the directory entry on the disk. No data gets moved or copied. | -3 | 3 | 142 | 2011-10-20T00:47:48.753 | infrastructure | serverfault.com | |
631,842 | apache redirect problems with secure connection | in my default-ssl.conf: [CODE] https www resolves to https / - works fine but the rest come up with privacy errors in chrome, and fair enough for that url, I want a redirect like www manages. [CODE] - priv error [CODE] - priv error Worked fine in http. | It appears that your SSL certificate is for [CODE] and not related subdomains. So when you go to something like [CODE] the SSL issued for [CODE] will not match. So some browsers will show warnings. Others won't. If this is a genuine concern of yours, your only real solution is to get SSL certificates for each subdomain... | -2 | 2 | 81 | 2014-09-28T05:15:51.573 | infrastructure | serverfault.com | |
49,722 | Need ideas on testing Screen Recording feature like zoom | We have recently launched screen recording feature on our web app. We provide support for browsers like Chrome, Safari and Edge to record/film the computer screen. We would like to know your opinions/ideas for testing this features. What can be possible tests that we can perform? What can be possible/probable risks ass... | Here some ideas; Test with selected tab only, and make sure that when you switch to another tab, it does not get recorded. Test the recovery testing, when a test is in progress and browser crashes, what happens? Test the recording for more than 30 minutes. Analyze the file size of recording. Test while muting the mic o... | -1 | 1 | 47 | 2022-02-02T14:09:06.450 | data_quality | sqa.stackexchange.com | |
940,593 | Changing PF rules on the fly to mitigate damage of DDoS (OpenBSD 6.4) | This is a two part question, really. Keep in mind that I am a developer not a system admin, but being the only employee in the company, I wear ALL the hats. I have deployed my server with two firewalls running on CARP for load balancing/redundancy plus about 40 computers for database and other backend application needs... | Since no one has answered my question this is the pf configuration I ended up with. Specifically look at the line for setting cookies after the table is filled with 15% open tcp connections. SYN Cookies provide a great bang for your buck when it comes to preventing too many half open connections. This is not final howe... | 4 | 3 | 1,422 | 2018-11-18T15:19:36.013 | infrastructure | serverfault.com | |
232,497 | Create a loop that visits every link on a site | I want to create an HTML scraper in Ruby on Rails and I want to implement a progress bar and an ability for it to pick up where it left off if it's interrupted while scraping. I think the best way to do this be to create a database table with a record for every single page, with a boolean column called 'scraped?' I'm t... | It's actually much harder than you've described: Some (different) links may refer to the same page. Consider [CODE] and [CODE] as a trivial example (request parameters are swapped). So detecting if page is crawled already would require you to check page contents. Page contents may change on every request. Consider [COD... | 0 | 2 | 1,489 | 2014-03-15T17:32:46.330 | api_errors | softwareengineering.stackexchange.com | |
436,334 | Checking a related aggregate existence is Domain concern? | This is my specific situation: I am following DDD and Event sourcing to implement my application (using C#). I have a Domain layer that contains Aggregates' implementation. I write unit tests for this layer to cover my business logic. Consider Employee aggregate that contains a field which is named PartyId. I have a sp... | Checking this kind of existence is the Domain concern or any other layers? According to the specification, this logic should be in the Domain layer or it can be on the others too? Retrieving the information is an application concern; deciding what to do with the information is a domain concern. There are a number of di... | -1 | 0 | 149 | 2022-01-29T09:38:21.223 | api_errors | softwareengineering.stackexchange.com | |
707,857 | Veeam Hyper-V backup error: Microsoft Hyper-V VSS Writer VSS_WS_FAILED_AT_POST_SNAPSHOT | I have an error from a Veeam Hyper-V backup of a Virtual Machine in a Hyper-V host: Unable to create snapshot (Microsoft CSV Shadow Copy Provider) (mode: Veeam application-aware processing). Details: Writer 'Microsoft Hyper-V VSS Writer' is failed at 'VSS_WS_FAILED_AT_POST_SNAPSHOT'. The writer experienced a transient ... | Is the virtual machine a domain controller? Have you tried below from http://www.veeam.com/kb1697 vssadmin list writers The results will appear as: Writer name: 'NTDS' Writer Id: {b2014c9e-8711-4c5c-a5a9-3cf384484757} Writer Instance Id: {ee24b741-eaf7-4663-8f95-b92ae8c5e164} State: [1] Stable Last error: No error If n... | 3 | 0 | 11,215 | 2015-07-23T08:04:21.993 | database_errors | serverfault.com | |
786,523 | Extending an existing LVM partition with fdisk | I am looking for some help on expanding my LVM partitions. I have two disks I want to expand (10GB to 50GB and 40GB to 150GB). I added the extra space in VMWare and the expanded disk is being picked up. [CODE] They are on sdb and sdc. This is all new to me but from what I can see there is still more to do to make them ... | From what you describe, the "disk" is really a virtual disk inside a virtual machine and you increased the disk size by resizing the volume in VMWare? If that's the case and the disk inside the virtual machine doesn't have a partition table (which is fine), than you have to use [CODE] directly to increase the PV and do... | 0 | 2 | 8,370 | 2016-06-27T13:48:06.377 | infrastructure | serverfault.com | |
16,638 | What are the solutions to the Distributed Queue problem? | I am trying to learn more about the various ways that the problem of a Distributed Queue may be solved. So I would like know what products, services, implementations and research papers that are already out there. An implementation will face many challenges and will be forced to make tradeoffs: Does it have strong or l... | Writing a basic queuing system is fairly simple, but as you noted above with all of the challenges, doing it right is another matter. I've used home grown systems for which I wrote the source code, 3rd party systems, and various JMS providers. JMS (Java Messaging Service) by far is the most complete solution I've encou... | 22 | 14 | 13,756 | 2010-11-03T22:10:12.050 | api_errors | softwareengineering.stackexchange.com | |
229,396 | trying to figure out how to bridge two virtual networks together and in turn bridge that to the internet for a virtual inline IDS/IPS system | I'm trying to figure out how to bridge two vmware (server or workstation, workstation) or virtualbox networks together with a linux IDS/IPS system transparently inline between both the virtual networks. How do I accomplish this? I understand how to bridge to virtual networks together, but how to I make the linux virtua... | I guess there are many ways to accomplish this. Keeping in mind what you want to do, I would: [CODE] [CODE] would have a default gateway which as it should already be set (a router on your ISP provider), and you should add a route to [CODE] through [CODE] (on [CODE] ): [CODE] [CODE] should forward all traffic (or just ... | 2 | 1 | 1,196 | 2011-01-31T23:21:33.773 | infrastructure | serverfault.com | |
334,753 | Help inconsistent index result on generated column after server restart | I have a table that has a date column and I need a data that will be group by week. And I found this Youtube video that used an index generated column Faster database indexes (straight from the docs) from PlanetScale. Then I modify my table to look like this. [CODE] Then I did this explain query [CODE] And the result i... | Short Answer: Not a problem. Long Answer: In a plain [CODE] , the "rows" is an estimate. So, the discrepancy is bogus. [CODE] will give you exact counts. (What version of MySQL are you running? That is a new feature.) [CODE] uses index statistics that are recomputed at various times. The reboot was probably one of thos... | 0 | 0 | 34 | 2024-01-11T02:59:23.433 | warehouse_errors | dba.stackexchange.com | |
490,352 | X11 forwarding over ssh applications very slow to start | I have a server that is extremely slow (takes 3-5 minutes) at starting X11 applications over a forwarded X11 link. I have tried connecting to it with 2-3 different machines with different operating systems. After the applications start everything seems to be fine. I am connecting using trusted X11 forwarding (ssh -Y) a... | Problem is that ssh does things on the loopback with ipv6 and I had ip6tables setup to drop all traffic. Just did the following and it works now: [CODE] Thanks to ezakimak on #gentoo for pointing out the ipv6 angle. | 1 | 3 | 8,463 | 2013-03-22T07:59:49.647 | api_errors | serverfault.com | |
620,210 | What determines a practical limit on the number of server blocks in Nginx configuration? | I am trying to figure out if a Nginx configuration consisting solely of simple server blocks is feasible. Each block serves a subdomain, and directs the subdomain to another URL. Of course, the maximum in a specific context depends on the parameters, so I am more interested in the factors that work to determine a pract... | The biggest factor affecting how many [CODE] s you can reasonably have is your CPU's cache size (and speed, of course). First, nginx stores all of the [CODE] s that you define into three hash tables (depending on whether you used wildcards in the name) per IP/port pair that nginx [CODE] s on. The size of these structur... | 6 | 7 | 2,983 | 2014-08-13T17:04:32.763 | infrastructure | serverfault.com | |
177,374 | SQL Server AG Listener issues in an AWS VPC | I'm experimenting with creating a 2-node SQL Server Availability Group following Guy Glantser's excellent guide at MadeiraData where he describes a configuration with no AD domain or internal DNS. Note that I'm building everything on AWS EC2 instances. Everything is working well (including the certificates and logins, ... | Can you please review the AWS documentation on how to properly set up AG on their environment? http://docs.aws.amazon.com/quickstart/latest/sql/part3.html There are some specific steps that need to be done for this to work. You may also want to read about the MultisubnetFailover ( https://learn.microsoft.com/en-us/dotn... | 4 | 1 | 1,966 | 2017-06-27T12:47:31.593 | database_errors | dba.stackexchange.com | |
317,809 | What are the advantages of Observables over an iterable of futures? | I recently came across the ReactiveX pattern for asynchronous data-flows. I studied the information provided there and also watched this talk by a Netflix engineer on how they used Observables to redesign their web API architecture. ReactiveX certainly seems like a clean and powerful abstraction, but I don't see the di... | Your examples are not semantically equivalent: [CODE] will execute the onSuccess, onError procedures each time a new element is received. On the other hand, with [CODE] the iterable delivers all the futures, and you register callbacks on each future as you get it from the iterable. But, at this point, the futures may s... | 5 | 4 | 2,799 | 2016-05-07T15:18:16.307 | api_errors | softwareengineering.stackexchange.com | |
41,686 | Parameters used in GridSearchCV Slow Down in skLearn Tutorial | I'm not sure why [CODE] is correct, rather than [CODE] In this tutorial on RBF SVM Parameters , we are using [CODE] to find the optimum hyperparameters for an SVM. They have the following code: [CODE] ... [CODE] where [CODE] and [CODE] are a subset of [CODE] and [CODE] . Just some information to show what [CODE] and [C... | If you aren't sure whether the code works or not, you could turn on gridsearch output: [CODE] I just run the script in your link - it worked fine for me. Are you sure you didn't change something while working on the code? | 0 | 1 | 1,261 | 2018-11-25T20:18:42.237 | data_quality | datascience.stackexchange.com | |
434,648 | Crash dump analysis | I hope this isn't a stupid question, and if it is, then I want to at least get it over with so I don't feel so dumb in the future. Here we are, loading up a Windows crash dump with Windbg. Here are the first few lines of the debugger output: [CODE] The MinorVersion I mostly understand. It's hexadecimal and it translate... | Partial answer: The [CODE] does indeed refer to the build number, and if you're willing to abuse older machines/OSes, you can verify that across platforms by matching up the build number of (for example) some XP and 2003 boxes with the [CODE] in the [CODE] . You'd probably also notice (or at least I did) that the [CODE... | 4 | 3 | 430 | 2012-10-03T23:31:50.793 | infrastructure | serverfault.com | |
499,433 | Is it possible to create a self-signed intermediate CA for ssl? | I am trying to create my own SSL hierarchy like: MyRootCA --MyIntermediateCA ----MyCert I have installed MyRootCA and MyIntermediateCA, but windows points out that MyIntermediateCA doesn't have the right to issue certs. Therefore it invalidates MyCert. I am using sign.sh from mod_ssl package, which utilizes openssl ca ... | Regularly an intermediate CA needs a valid signature (also not expired) from a trusted CA and also the usage restriction tag CA:true. Normally intermediate CAs are not directly listed in the trust database by verifying clients. Therefore, when a service sends its own certificate which is signed by an intermediate CA (f... | 1 | 2 | 1,370 | 2013-04-15T09:34:12.387 | infrastructure | serverfault.com | |
9,560 | Does this database table violate normalization rules? | I’m working with Access 2010. I’m developing a database for a public art program – we paint large scale murals on walls. The database tracks blank walls in the city as potential sites for murals. It includes information about the building itself and the surrounding property such as the lot the wall faces. My main quest... | [CODE] doesn't break any of the rules, if each of those fields is an independent property of the wall. I would suggest it's probably not worth redesigning... This is assuming that the properties listed are the fixed set of properties. If there are going to be extra things added, then it would be worth splitting it out ... | 2 | 1 | 345 | 2011-12-21T21:09:04.403 | warehouse_errors | dba.stackexchange.com | |
618,675 | rsync IMAP SENT folders between 2 users | How can I handle this: We have a Email system based on DOVECOT IMAP, different users, different logins. I want to somehow rsync all sent folders of some users, so one user can check what another user have written for example to customers. The sent emails should copy to the sent folder of each user designated. The basic... | From the rsync manual: rsync -avz foo:src/bar /data/tmp This would recursively transfer all files from the directory src/bar on the machine foo into the /data/tmp/bar directory on the local machine. The files are transferred in "archive" mode , which ensures that sym‐ bolic links, devices, attributes, permissions, owne... | 0 | 1 | 989 | 2014-08-07T11:14:10.257 | infrastructure | serverfault.com | |
709,583 | error code 0x80190194 in wsus windowsupdate.log | My client doenst show itself in the wsus service. how is this possible? I set everything correct following the microsoft guides. now i got the following warnings in my windowsupdate.log file: EDIT: I deleted the log file because some private data were in it | Fixed it in chat . Ports were wrong (80 instead of 8530) and some mistakes in the WSUS GPO. Works now. | -1 | 0 | 1,755 | 2015-07-30T07:39:27.123 | infrastructure | serverfault.com | |
157,831 | Error: Relation ["table name"] does not exist | I am trying to create tables based on relational schema, but I get "Relation does not exist" errors for some tables and could not find a way to get out of this. I will display my schema, code, and actual errors below. I really feel this might have a simple solution, but I just got stuck into it.. [CODE] Errors: [CODE] | You try to create relations (constraint) before create parent objects, for example: order #2: [CODE] but table Bus at this moment not created. 2 possible solutions: Create tables in order - from parent to child (not always possible) Create all tables without constraints and add all of them after | 0 | 2 | 9,297 | 2016-12-11T20:20:02.187 | warehouse_errors | dba.stackexchange.com | |
69,280 | Checking if an Username is already in use | I am writing some scripts for my website, and I am currently focussing on checking if a username is already in use. I have tried writing a SELECT script where the datafield is selected and checks if the POSTed data matches. Here is my code: [CODE] I cannot figure out the issue that is preventing the code from ECHOing "... | mysql_query() returns false only when there is something wrong with your query and it fails to execute. Otherwise, the return value is a resource which evaluates to success. That is your code always echoes "Account Exists". Check for the number of rows the SELECT statement fetched to determine whether the user exists o... | 2 | 4 | 20,667 | 2014-06-28T22:05:44.903 | database_errors | dba.stackexchange.com | |
1,068,326 | VM Instance Resource Allocation in GCP Console | We are trying to teach GCP services for college students. So, I have created the VM instance in particular project. We need to know how to manage resource allocation for every user in GCP console. For example, 5 students are accessing 1TB VM instance. We need to ensure that, every student must be allocated with 200GB o... | Yes, it is possible to allocate resources to users individually via the GCP console. First, you need to create a disk and attach it to the VM instance that you’ve created. Repeat this step and create the desired number of disks and attach it to the same VM instance. Members should be added to disk level but not at proj... | 0 | 0 | 212 | 2021-07-01T05:57:40.737 | infrastructure | serverfault.com | |
320,649 | Proper way to setup SMTP server and Reverse DNS Records | I have IIS 6 SMTP server running on 2003 box. I am running a webserver (IIS) on the same system. I want the SMTP server to deliver mail for my webserver. I have it working fairly well - my only problem/confusion is getting a Reverse DNS record setup. First, while this is all on the same machine, I believe it has been s... | the second one: 4.3.2.1.in-addr.arpa ---> smtp.mydomain.com if it was [CODE] , you wouldn't need your ISP to do it | -1 | 1 | 278 | 2011-10-11T00:03:14.977 | infrastructure | serverfault.com | |
985,562 | ESXi password not accepted | I have a ESXi 6.7 install, where logging in via the Web UI does not work. The user is root, and password is 20 characters ASCII. I have encountered the same issue previously, and in that instance I manually verified the hash by extracting the config bundle, and encrypting the password I was believed to be correct with ... | I have experienced a couple of times that login on the web UI was not possible with the correct password. The solution for me always was to restart the management services, then the login on the web UI worked again. You will need access via SSH or the local console for that though. If you can't enable SSH access via vC... | 3 | 3 | 3,898 | 2019-09-25T09:23:11.760 | api_errors | serverfault.com | |
172,254 | Strange problem with VPN | I have remote VPn server, that Im trying to connect. I have password and username that are correct. In our office we have slackware server, configured with iptables firewall. The firewall has a POSTROUTING rules, that are correct. Computers in our local network are 192.168.0. type. Now the problem: When Im trying to co... | are you routing traffic through one machine to anouther, or are both machines connecting to something like a siwtch -> modem -> internet ? It may be a routing error on the local network. | 0 | 0 | 99 | 2010-08-19T08:57:11.787 | infrastructure | serverfault.com | |
887,561 | Is there an Internet Organization to file complaints to about ISP DNS Hijacking? | I have a router with two WAN connections from different ISPs. When I query 8.8.8.8 for a domain from ISP-A I get a completely different reply, from when I query 8.8.8.8 for the same domain from ISP-B. I am beginning to think that one of them is rerouting the traffic from 8.8.8.8 and 8.8.4.4 to their own DNS servers to ... | I know of zero countries in the world that have a regulatory body that both a) cares and b) has the power to penalize IP spoofing foul play. The international organizations all lack b), and on federal level you probably wont be successful either, for example: FCC (USA) is probably the most popular one, which does care ... | 4 | 6 | 254 | 2017-12-11T17:33:07.937 | infrastructure | serverfault.com | |
995,677 | Using a AWS Network Load Balancer for MySQL Cluster | I have asked this question on stackoverflow but I though it might be more suitable for this community. I have a web server which connects to a MySQL cluster (it's Galera cluster)... the cluster works fine (if I update a record on the first instance of MySQL, it is automatically updated on the second instance). The prob... | Interesting that the connection string doesn’t work. Can you run mysql client from the webserver and verify that it can connect and authenticate? [CODE] Also - are you sure you need NLB after all? How about using DNS for your load balancing? Create a record like [CODE] with two addresses, one for each of your db cluste... | 1 | 1 | 3,944 | 2019-12-16T07:42:17.830 | database_errors | serverfault.com | |
387,475 | How to name the function of a thing differently than the thing itself? | A sensor identified by the serial number “ABC1234” fulfills a measurement function identified by the name “Pressure sensor 7” in a production facility. Within the production facility, nobody cares what the actual sensor fulfilling the function is. Actual sensors breaks on a regular basis and must be replaced. When peop... | How can I make the user interface and the source code of the software controlling the facility unambiguous when it comes to express the concept of a function of a thing and not the actual thing By aligning the language with the context in which it is used. It's normal that words like "sensor" mean different things to d... | -3 | 2 | 136 | 2019-02-20T13:15:15.123 | airflow_errors | softwareengineering.stackexchange.com | |
52,840 | Why does SQL Server fail to create a procedure referencing a linked server? | Red Gate Deployment Manager (RGDM) today failed with a "login failed" error even though it had administrative control of the target server: [CODE] One of the procedures I want to deploy refers to the distribution database on a linked server. The definition looks like this: [CODE] In SSMS I connected to the target serve... | Some objects are allowed to be created to facilitate Deferred Name Resolution . The assumption is that if you create a procedure that references [CODE] , you will create [CODE] some time between the moment you create the procedure, and the first time you execute it. Another situation that works is a table that doesn't ... | 2 | 8 | 9,831 | 2013-11-05T18:22:58.020 | pipeline_ops | dba.stackexchange.com | |
859,278 | System network buffers leaking/fully used, on Windows x64 with plenty of free RAM. How to diagnose and resolve? | This is related to this question and extends it. The symptoms are the same - 2012R2 x64 with 64GB RAM (21GB used), [CODE] and [CODE] both work fine, but IE won't open web pages, [CODE] returns an error 1450 "Insufficient system resources exist to complete the requested service" and PuTTY gives the error "Network Error,... | Ok, I had been having the same problem for a while. I found another answer that helped. Run "netstat -ano" from a Command Prompt. In my case, the response was an almost-endless list of connections all having the same number in the last column. That last column is the process id. I then used Process Explorer (add-on ava... | 4 | 4 | 2,090 | 2017-07-04T11:34:39.653 | infrastructure | serverfault.com | |
252,471 | multiple archive_command in PostgreSQL | I have replication with PostgreSQL, so I want to set [CODE] but I also want to save WAL files to another safe place: S3. So is it possible to have multiple [CODE] s? And can I put this command on the slave to push wal files to S3 instead of on the master - I want master to have less performance impact. | You don't need multiple [CODE] s: [CODE] The [CODE] is interpreted by the shell. If the [CODE] has a non-zero return code, that will be the result of [CODE] . If the result is 0 (success), the second command is executed, and its return code will be the result of [CODE] . You can also defer archiving to S3 to the standb... | 3 | 2 | 1,244 | 2019-11-04T04:12:30.797 | hadoop_errors | dba.stackexchange.com | |
144,748 | What might be the cause of regular periodic slow transactions on an OLTP system? | I have a two node Oracle RAC cluster with that runs an oltp application against it. I have both a production and a duplicate test environment with the same setup. Upon running stress tests on the Test environment (about 160 tps), The average latency is about 70ms. I noticed that when I examined the maximum transaction ... | High [CODE] wait events mean that throughput on writing to the online redo logs is not high enough. This blog gives a great explanation of how to diagnose and troubleshoot that event: http://logicalread.solarwinds.com/oracle-log-file-sync-wait-event-dr01/#.V_TSTvkrKUk [CODE] and other GC wait events indicate RAC cluste... | 3 | 0 | 500 | 2016-07-24T02:25:51.763 | api_errors | dba.stackexchange.com | |
130,166 | After Update/Insert trigger sometimes fails to do its job | I've got this trigger: [CODE] I think it's obvious what it does but to make it clear let me give a brief explanation. In my [CODE] table there's DOCNUMBER column. I assign a value to this column in Before Update trigger. And in the above trigger, which of course should fire after the Before Update Trigger, I check if t... | While testing with random data the above trigger worked perfectly for insertion. But as Mat said in the comment, while updating the [CODE] column of [CODE] the after update trigger failed to update that value in [CODE] table. Here is the output of the sample test: SQL> INSERT INTO INT_DOC(DOCID,RECEIVEDDATE,SENDERFULLN... | 1 | 1 | 4,595 | 2016-02-23T11:41:01.547 | warehouse_errors | dba.stackexchange.com | |
22,582 | Create unique numeric token on PostgreSQL | I have a database where I want to generate unique tokens of six numeric characters. These tokens should be generated each time an invoice number is inserted in the [CODE] column. This would mean that every time I do an insert and the column [CODE] is not [CODE] , the token is generated. I want the token to be to genera... | If you don't mind the unique token being sequential, you can use a sequence, like so: [CODE] To test: [CODE] Note that I have used [CODE] as you specified that the token should be "numeric characters". The above is the same as using an [CODE] column in MySQL. However, to accommodate for the fact that you only want to g... | 1 | 3 | 2,530 | 2012-08-16T06:25:08.057 | database_errors | dba.stackexchange.com | |
634,228 | How to fix non-working ethernet under Linux, with RX permanently increasing? | I have a system with the latest Linux Mint. An ethernet cable which yields internet with no special action from me under Windows 8.1 is detected under Linux, but does not seem to work. Running ifconfig repeatedly shows me the OS keeps downloading mysterious packets. ping gives no result. | Running [CODE] Will tell you where the traffic is coming from. I would double check the current route settings for the interface with [CODE] | 0 | 0 | 40 | 2014-10-07T17:16:57.187 | infrastructure | serverfault.com | |
10,455 | Why does Reporting Services fail to import an existing encryption key during a service account change? | I've changed the service account for SQL Server 2005 Reporting Services a number of times now, but yesterday was the first time I'd run into the dreaded 'The report server cannot decrypt the symmetric key used to access...' error. The environment is SQL Server 2005 Enterprise edition installed as a named instance on a ... | When you are using a different service account the key should fail The Report Server service uses the symmetric key to access the encrypted data in a report server database. This symmetric key is encrypted by using an asymmetric public key that corresponds to the computer and the user account that is used to run the Re... | 4 | 1 | 3,134 | 2009-05-20T17:13:48.320 | data_quality | serverfault.com | |
73,185 | Oracle 11g R2 installation on Ubuntu 14.04 LTS | I have installed Oracle 11g R2 on ubuntu 14.04 LTS. On terminal I wrote following to start oracle: [CODE] on pressing enter, got following output : [CODE] What should I do now. | try these commands on terminal : [CODE] | 1 | 2 | 8,187 | 2014-08-05T06:38:19.610 | database_errors | dba.stackexchange.com | |
1,119,228 | xt_geoip not blocking connections? | I have [CODE] configured to block connections from various countries, but it appears that connections are still being allowed from those countries. From my [CODE] (reduced a little): [CODE] (I recently added the [CODE] filters thinking that there was something else going on, but it changes nothing. Similarly, I don't t... | late answer. i think it only works with max 10 countries per rule. | 0 | 1 | 267 | 2023-01-01T16:59:50.223 | pipeline_ops | serverfault.com | |
2,293 | Scalable Outlier/Anomaly Detection | I am trying to setup a big data infrastructure using Hadoop, Hive, Elastic Search (amongst others), and I would like to run some algorithms over certain datasets. I would like the algorithms themselves to be scalable, so this excludes using tools such as Weka, R, or even RHadoop. The Apache Mahout Library seems to be a... | I would take a look at t-digest algorithm . It's been merged into mahout and also a part of some other libraries for big data streaming. You can get more about this algorithm particularly and big data anomaly detection in general in next resources: Practical machine learning anomaly detection book. Webinar: Anomaly Det... | 10 | 7 | 2,263 | 2014-10-17T10:47:13.197 | database_errors | datascience.stackexchange.com | |
178,277 | No forward accessible form outside | I've setup a UNIX ubuntu VM with VMWare its running IRC, HTTP, FTP & MySQL, ports are forwarded in the modemrouter (its my home network its running on) but still no result. Any Idea hwo to fix it? Note i've been testing with: mibbit.com, http://downformeorjusteveryone.com Thanks in advance | Have you ensured that your VM 's NIC is set for bridge networking mode versus the default mode of NAT? You will also need to set up a working static IP for your network and ensure the port forwards are pointing the corresponding application ports to the VM IP. | 0 | 1 | 59 | 2010-09-05T15:49:49.160 | database_errors | serverfault.com | |
11,896 | dynamic addition and variety of neural network outputs | After studying some academic papers about neural network recognition, plus trying some of them out myself, I do understand how you can train a network to give you a certain output on a defined set of output neurons depending on the input. However I struggle to understand, how I can dynamically add output neurons. I've ... | Modifying the output layer of neural networks is part of transfer learning. Adding new classes/output nodes always requires additional training. One common option is just to retrain the last layer, aka the softmax layer. The last layer is the mapping from feature extractors to category membership. | 2 | 1 | 585 | 2016-05-24T08:04:07.577 | data_quality | datascience.stackexchange.com | |
627,499 | Production server (cluster) configuration | I have a problem, that i'd like to address to you. We are creating an webapp that shows infos and statistics. And we have a problem about how to 'do right' our server configuration The thing is that our apps use crons to do few things, and crons sometimes blocks our database, and when that happens, whole application is... | You should make your programmers to fix cron queries, that they do not block mysql. That is the only one right way. If a programmer needs to process a lot data it must run it in a loop in small and fast chunks. | 1 | 1 | 77 | 2014-09-10T09:01:45.363 | infrastructure | serverfault.com | |
18,378 | Can I grant a user ALTER TRACE permission to a single database? | I have a development user who requires the ability to use SQL Profiler on a single database. Is there a way to enable this without granting a server-wide ALTER TRACE permission? (The user should not have any access to the other databases at all.) This is Microsoft SQL Server 2008 R2. | i doubt that the ALTER TRACE permission is a server level permission, and access is at the server level; if a user can start a trace, he or she can retrieve event data no matter what database the event was generated in. for more info http://technet.microsoft.com/en-us/library/cc293611.aspx http://msdn.microsoft.com/en-... | 5 | 9 | 16,791 | 2012-05-24T20:01:28.530 | database_errors | dba.stackexchange.com | |
1,119,015 | Before-snapshot script hook for Windows guest on Proxmox? | I have a Proxmox server setup with a Windows 10 guest that will be running MSSQL Express. The Windows guest has QEMU guest agent installed and working. For backups, I have a separate server running Proxmox Backup, which is already scheduled to take full backups of the guest once a week (stop mode). In addition, I need ... | You should be able to script a snapshot on a Windows machine using [CODE] . However, please note that: vss snapshots on Windows 10 have the reputation of being unusable due to snapshot data corruption (I had first-hand experience on the issue when trying to recover some snapshotted files via [CODE] ) any modern databas... | 0 | 1 | 646 | 2022-12-28T21:22:59.943 | database_errors | serverfault.com | |
61,207 | Trouble with installing additional modules on Postgresql 9.1 on ALT-Linux | I'm trying to create extension under postgresql 9.1 (Linux): [CODE] but got error: [CODE] This file exists and has r/w permissions for all users: [CODE] How to solve this problem? | In this particular situation what did help me: It was needed just to copy [CODE] directory from [CODE] to [CODE] . That's all folks. | 3 | 1 | 3,344 | 2014-03-19T08:52:55.393 | database_errors | dba.stackexchange.com | |
291,557 | Proper use of the GPL when using a library covered by an older version | I have a piece of software that I have been working on for a while now. You can find it here . Since it is now at a stage where it could potentially be useful to other researchers, I decided to cover it by the GPL. While most of it is code that I wrote myself, one set of functions, contained in butterworth.c and butter... | Per the comment you left, the code you are using but do not own is licensed under GPLv2 or any later version . That clause may be omitted; the Linux kernel is a famous example of a project that is only licensed as GPLv2. However, it appears that clause is intact in this instance. Based on the information in the questio... | 2 | 3 | 41 | 2015-08-01T22:11:52.000 | api_errors | softwareengineering.stackexchange.com | |
13,518 | Span single transaction over several sequential psql sessions | I am running PostgreSQL 8.4 database server and psql terminal front-end on Ubuntu 10.04 Lucid Lynx and would like to span a single transaction over several sequential psql sessions. When I connect to my database with psql a new connection is established and a server backend process for this connection is created. When ... | Maybe it would be easiest to run a psql in the background, with it set to execute stdin, and connect its stdin to a named pipe. Then you can continually push data into that pipe, and finally push "end; \quit". Something like: [CODE] Note that you can't simply do [CODE] since the EOF would be transmitted to psql, which ... | 7 | 7 | 4,488 | 2012-02-17T20:55:14.457 | database_errors | dba.stackexchange.com | |
10,189 | Errors after installing mysql | After installing mysql I get the following errors: [CODE] I have tried to run mysql_upgrade and I get the following: [CODE] I have tried to re-install mysql. I get the same results. I am wondering if someone can suggest some useful tricks to get this working. I am using a mac running 10.7.2 Thanks again for your help i... | The problem I see is the error message that says Table 'mysql.plugin' doesn't exist **120105 6:02:49 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it MySQL 5.1 introduced plugins. MySQL 5.0 and prior do not have plugins. My guess is that you had MySQL 5.0 running, you uninstalled MySQL 5... | 4 | 1 | 4,056 | 2012-01-05T11:12:02.820 | database_errors | dba.stackexchange.com | |
473,364 | File Permissions - Service vs Console | We have just setup a new build Windows 2008 R2 server for our Jenkins CI system. Our issue appears to be related to file permissions being different depending on whether a process is a service, or a console process. When logged in as UserX, we can successfully do a directory listing of [CODE] (actual command), and it r... | We figured this problem out, so I'm posting the solution for others. The problem was that the Jenkins slave process (the service) was running as a 32-bit process. Windows, being helpful, was automatically redirecting access to c:\Windows\System32 to c:\Windows\SysWOW64. The executables we were looking for should have b... | 1 | 1 | 161 | 2013-01-29T09:45:59.293 | pipeline_ops | serverfault.com | |
474,993 | Nginx Reverse Proxy to Heroku Application | Is it possible to use Nginx on my personal VPS to act as a reverse proxy in front of Heroku (running a Ruby on Rails app)? I'd like to do this because I want to route standard requests (i.e. [CODE] ) to my Rails app, but various subdomain requests (i.e. [CODE] ) to a separate server. As a bit of a part 2 (assuming this... | It is possible to do what you are proposing through proxy_pass ( http://wiki.nginx.org/HttpProxyModule#proxy_pass ) but it would be easier to route these requests through DNS. To use the apex domain for Heroku, you can use ALIAS records at DNSimple or ANAME records at DNS Made Easy and regular A records for your subdom... | 1 | 3 | 4,725 | 2013-02-03T18:35:34.183 | infrastructure | serverfault.com | |
1,047,959 | Computers can't join domain - probably DNS issue | I installed and configured an Active Directory Controller (Windows Server 2019), and also did a clean install of Windows 10 Enterprise. Both were installed in Hyper-V and both use the same Private switch. Domain on the Server is successfully created, it is promoted to a domain controller and DNS server is running. I fo... | APIPA addresses won't be registered in DNS, so although your zone looks OK, my suspicion is that there's no corresponding A record for the Domain Controller. Therefore the client can't resolve the ip address of the Domain Controller. Assign the server and the client an ip address in the same subnet of one of the RFC191... | -1 | 1 | 1,662 | 2020-12-29T18:25:10.217 | infrastructure | serverfault.com | |
160,649 | Composite indexes: Most selective column first? | I’ve been reading about [CODE] and I’m slightly confused about ordering. This documentation (little less than half way down) says In general, you should put the column expected to be used most often first in the index. However, shortly after it says create a composite index putting the most selective column first; that... | From AskTom (in 9i, there is a new "index skip scan" -- search for that there to read about that. It makes the index (a,b) OR (b,a) useful in both of the above cases sometimes!) So, the order of columns in your index depends on HOW YOUR QUERIES are written. You want to be able to use the index for as many queries as yo... | 26 | 14 | 14,374 | 2017-01-11T00:33:43.833 | database_errors | dba.stackexchange.com | |
68,839 | I need to copy data from remote Postgres server that has limited disk space and limited connectivity to a server | I have a remote Postgres server recording some data every second. the server has very less space like 6-7 GB, currently I write data to a remote VM server but due to poor connectivity the applications fails everyday without notice (I believe as I get error 0x80004005 which is a ODBC related error). I need to fix this a... | It sounds like you don't need a local server, just a queue file that you write the data to then insert in batches into the server when it's available. Just log to a local CSV file or something. Alternately, you could use something like Londiste (from Skytools) to replicate the rows from a local server to the remote. It... | 1 | 2 | 284 | 2014-06-23T15:06:28.240 | warehouse_errors | dba.stackexchange.com | |
253,047 | Apache 403 Error - where is the fault? | My environment: Ubuntu 10.10 Desktop Edition So I am trying to access a file through my localhost and Apache is giving me a 403 error. On [CODE] , I've added this line : [CODE] The contents of [CODE] : [CODE] Then make sure folder is accessible to www-data, on my terminal: [CODE] Then restart Apache, Apache does not co... | Have you checked that www-data can read each of the dirs in the path? start at the top level dir and work your way down. | 0 | 1 | 11,333 | 2011-03-29T07:34:53.280 | api_errors | serverfault.com | |
339,079 | Setting up multiple web servers - Cloud | Our site traffic has grown large enough that we need to implement two web servers. We've signed up for the RackSpace cloud and we're wanting to move our eCommerce platform accross. We're running Magento. Basically I have a few issues. I'm in the testing phase at the moment and I've built two web servers which connect t... | Regarding your question about session persistence, there's a few ways to get around losing your persistence. Storing your sessions in a database, memcache or shared storage is one way, which may work fine, but may introduce a single point-of-failure into your environment. Another way may be to see if you can have your ... | 1 | 1 | 216 | 2011-12-08T17:57:29.557 | infrastructure | serverfault.com | |
788,131 | BitBucket Server Automatic Deployments with PHP WebHook | I've done some research and I'm attempting to reproduce something similar to JONATHAN NICOL's blog post, " Automated git deployments from Bitbucket ". UPDATE TO ISSUE I've enabled logging of the output from the [CODE] function with the addition of [CODE] at the end of my command. When I print the contents of what is re... | Turned out to be a SELinux Permission issue with the apache user under RedHat 7.2. I created another user and added a bash script to execute the git fetch and checkout. I also modified my sudoers file to allow apache to run the bash script as the newly created user. | 0 | 0 | 726 | 2016-07-05T23:33:58.003 | pipeline_ops | serverfault.com | |
251,710 | SQL Server 2014 DELETE with OUTPUT | Why would I get an 'incorrect syntax' error with this (on the OUTPUT keyword): [CODE] @BatchTransactionIDs is a User-Defined Table type | The [CODE] has to go before the [CODE] . [CODE] | 0 | 2 | 650 | 2019-10-22T16:05:28.717 | database_errors | dba.stackexchange.com | |
243,599 | How to find resource intensive SQL operations in Postgresql? High CPU usage spike | I am getting frequent high CPU usage alerts from production DB server. As I want to investigate more into this by my own, I have collected the running DB queries for that high CPU usage time period. [CODE] From the collected data, observed that there is one frequently accessed table with UPDATE operation. From further ... | The problem was with the indexing of few tables. I was able to identify those tables with Read stats by performing the following query. [CODE] | 2 | 4 | 11,533 | 2019-07-24T03:25:52.097 | database_errors | dba.stackexchange.com | |
1,033,587 | Issues assigning permissions for sailpoint service account | I have been assigned the task of building out a sailpoint service account without assigning it Domain Admin permissions. I have delegated control of the parent OU to the service account, as well as assigned the following permissions to the account Read all properties Read members Write all properties Write members yet,... | If performing an administrative reset, you need to grant the Reset Password Active Directory Extended Right . (00299570-246d-11d0-a768-00aa006e0529) Example here: https://www.pwsh.ch/active-directory-powershell-delegate-permission-to-reset-user-passwords-for-a-specific-organizational-unit-150.html [CODE] | 0 | 0 | 279 | 2020-09-11T21:11:40.627 | infrastructure | serverfault.com | |
222,819 | MySQL is killing the server IO | Possible Duplicate: MySQL is killing the server IO. I manage a fairly large/busy vBulletin forums (running on gigenet cloud), the database is ~ 10 GB (~9 milion posts, ~60 queries per second), lately MySQL have been grinding the disk like there's no tomorrow according to iotop and slowing the site. The last idea I can ... | First, though only tangentially related, you should probably look into switching from MyISAM to InnoDB. It will perform better under the kind of concurrency you likely have, and is much less likely to lose data in the event of a crash. How much memory are you feeding to the memcached instance? Increasing this may help ... | 1 | 3 | 1,175 | 2011-01-14T21:52:49.243 | data_quality | serverfault.com |
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