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Apache Hadoop
transfers packaged code nodes process data parallel.approach takes advantage data locality nodes manipulate data access to.allows dataset processed faster efficiently would conventional supercomputer architecture relies parallel file system computation data distributed via highspeed networking.the base apache hadoop fr...
Apache Hadoop
history according cofounders doug cutting mike cafarella genesis hadoop google file system paper published october .paper spawned another one google – mapreduce simplified data processing large clusters.development started apache nutch project moved new hadoop subproject january .doug cutting working yahoo time named s...
Apache Hadoop
continues evolve contributions made project.first design document hadoop distributed file system written dhruba borthakur .architecture hadoop consists hadoop common package provides file system operating system level abstractions mapreduce engine either mapreducemr yarnmr hadoop distributed file system hdfs.hadoop com...
Apache Hadoop
hdfs uses method replicating data data redundancy across multiple racks.approach reduces impact rack power outage switch failure hardware failures occurs data remain available.a small hadoop cluster includes single master multiple worker nodes.master node consists job tracker task tracker namenode datanode.slave worker...
Apache Hadoop
higher.standard startup shutdown scripts require secure shell ssh set nodes cluster.in larger cluster hdfs nodes managed dedicated namenode server host file system index secondary namenode generate snapshots namenodes memory structures thereby preventing filesystem corruption loss data.similarly standalone jobtracker s...
Apache Hadoop
consider instead data store due lack posix compliance provide shell commands java application programming interface api methods similar file systems.hadoop instance divided hdfs mapreduce.hdfs used storing data mapreduce used processing data.hdfs five services followsname nodesecondary name nodejob trackerdata nodetask...
Apache Hadoop
master node track files manage file system metadata stored data within it.particular name node contains details number blocks locations data node data stored replications stored details.name node direct contact client.data node data node stores data blocks.also known slave node stores actual data hdfs responsible clien...
Apache Hadoop
every data node sends heartbeat message name node every seconds conveys alive.way name node receive heartbeat data node minutes take data node dead starts process block replications data node.secondary name node take care checkpoints file system metadata name node.also known checkpoint node.helper node name node.second...
Apache Hadoop
job tracker talks name node know location data used processing.name node responds metadata required processing data.task tracker slave node job tracker take task job tracker.also receives code job tracker.task tracker take code apply file.process applying code file known mapper.hadoop cluster nominally single namenode ...
Apache Hadoop
datanode serves blocks data network using block protocol specific hdfs.file system uses tcpip sockets communication.clients use remote procedure calls rpc communicate other.hdfs stores large files typically range gigabytes terabytes across multiple machines.achieves reliability replicating data across multiple hosts he...
Apache Hadoop
data nodes talk rebalance data move copies around keep replication data high.hdfs fully posixcompliant requirements posix filesystem differ target goals hadoop application.tradeoff fully posixcompliant filesystem increased performance data throughput support nonposix operations append.in may highavailability capabiliti...
Apache Hadoop
checkpointed images used restart failed primary namenode without replay entire journal filesystem actions edit log create uptodate directory structure.namenode single point storage management metadata become bottleneck supporting huge number files especially large number small files.hdfs federation new addition aims ta...
Apache Hadoop
example node contains data b c node x contains data x z job tracker schedules node perform map reduce tasks b c node x would scheduled perform map reduce tasks x z. reduces amount traffic goes network prevents unnecessary data transfer.hadoop used file systems advantage always available.significant impact jobcompletion...
Apache Hadoop
due widespread integration enterpriselevel infrastructure monitoring hdfs performance scale become increasingly important issue.monitoring endtoend performance requires tracking metrics datanodes namenodes underlying operating system.currently several monitoring platforms track hdfs performance including hortonworks cl...
Apache Hadoop
designed scale tens petabytes storage runs top file systems underlying operating systems.apache hadoop ozone hdfscompatible object store targeting optimized billions small files.ftp file system stores data remotely accessible ftp servers.amazon simple storage service object storage targeted clusters hosted amazon elast...
Apache Hadoop
jobtracker pushes work available tasktracker nodes cluster striving keep work close data possible.rackaware file system jobtracker knows node contains data machines nearby.work cannot hosted actual node data resides priority given nodes rack.reduces network traffic main backbone network.tasktracker fails times part job...
Apache Hadoop
tasktracker node spawns separate java virtual machine jvm process prevent tasktracker failing running job crashes jvm.heartbeat sent tasktracker jobtracker every minutes check status.job tracker tasktracker status information exposed jetty viewed web browser.known limitations approach arethe allocation work tasktracker...
Apache Hadoop
job tracker allocates work tracker nearest data available slot.consideration current system load allocated machine hence actual availability.if one tasktracker slow delay entire mapreduce job – especially towards end everything end waiting slowest task.speculative execution enabled however single task executed multiple...
Apache Hadoop
job scheduler refactored jobtracker adding ability use alternate scheduler fair scheduler capacity scheduler described next.fair scheduler fair scheduler developed facebook.goal fair scheduler provide fast response times small jobs quality service qos production jobs.fair scheduler three basic concepts.jobs grouped poo...
Apache Hadoop
capacity scheduler capacity scheduler developed yahoo.capacity scheduler supports several features similar fair scheduler.queues allocated fraction total resource capacity.free resources allocated queues beyond total capacity.within queue job high level priority access queues resources.there preemption job running.diff...
Apache Hadoop
example one single namenode hadoop hadoop enables multiple name nodes solves single point failure problem.in hadoop containers working principle docker reduces time spent application development.one biggest changes hadoop decreases storage overhead erasure coding.also hadoop permits usage gpu hardware within cluster su...
Apache Hadoop
also used complement realtime system lambda architecture apache storm flink spark streaming.commercial applications hadoop includelog clickstream analysismarketing analyticsmachine learning data miningimage processingxml message processingweb crawlingarchival work compliance including relational tabular data prominent ...
Apache Hadoop
june yahoo made source code hadoop version available opensource community.in facebook claimed largest hadoop cluster world pb storage.june announced data grown pb later year announced data growing roughly half pb per day.as hadoop adoption become widespread half fortune companies used hadoop.hadoop hosting cloud hadoop...
Apache Hadoop
branding apache software foundation stated software officially released apache hadoop project called apache hadoop distributions apache hadoop.naming products derivative works vendors term compatible somewhat controversial within hadoop developer community.papers papers influenced birth growth hadoop big data processin...
SQL Anywhere
named hadoop sons toy elephant.michael franklin alon halevy david maier databases dataspaces new abstraction information management.authors highlight need storage systems accept data formats provide apis data access evolve based storage systems understanding data.fay chang et al.bigtable distributed storage system stru...
SQL Anywhere
strong encryption supported database files clientserver communication.uses sql anywhere used several contexts including embedded database particularly application data store.example used intuit quickbooks network management products backup products.ability used minimal administration distinguishing feature role.it used...
SQL Anywhere
includes scalable data synchronization technology provides changebased replication separate databases including large serverbased rdbms systems.technologies sql anywhere server high performing embeddable relational databasemanagement system rdbms scales thousands users server environments desktop mobile applications us...
Oracle Database
oracle database available several service providers onprem oncloud hybrid cloud installation.may run third party servers well oracle hardware exadata onprem oracle cloud cloud customer history larry ellison two friends former coworkers bob miner ed oates started consultancy called software development laboratories sdl ...
Oracle Database
c current release oracle database c stands cloud.previous releases e.g.oracle database g oraclei database used suffixes g stand grid internet respectively.prior release oraclei database suffixes featured oracle database naming conventions.note v oracle database cofounder larry ellison knew one would want buy version .o...
Oracle Database
current oracle database releases patching end dates.patch updates security alerts prior oracle database c oracle corporation released critical patch updates cpus security patch updates spus security alerts close security vulnerabilities.releases issued quarterly releases updates issued prior next quarterly release.star...
Oracle Database
however new optimizer functional fixes included.market position gartner report claimed show oracle holding rdbms market share worldwide based revenue share ahead four closest competitors – microsoft ibm sap teradata .competition market relational databases oracle database competes commercial products ibms db udb micros...
IBM Cloud Object Storage
oracle acquired innobase supplier innodb codebase mysql part compete better open source alternatives acquired sun microsystems owner mysql .database products licensed opensource legal terms open source definition free distribute free royalty licensing fees.see also comparison relational database management systemscompa...
IBM Cloud Object Storage
bucket names keys chosen objects addressable using http urls.features ibm cloud object storage offers different storage classes identical data protection security durability resiliency.classes differ data pattern availability needs.history offering originally introduced cleversafe inc. company based chicago illinois.cl...
History of Microsoft SQL Server
cleversafe founded chicago illinois s. christopher gladwin originally based iits technology incubator.company stated provides limitless data storage.company patents issued .ibm announced completion acquisition cleversafe november since rebranded companys products ibm cloud object storage.references external links offic...
History of Microsoft SQL Server
windows nt released alongside windows nt .. sql server .first version designed nt include direction sybase.about time windows nt released july sybase microsoft parted ways pursued design marketing schemes.microsoft negotiated exclusive rights versions sql server written microsoft operating systems.sybase changed name p...
History of Microsoft SQL Server
sql server .sql server .major rewrite c older sybase engine coded c. data pages enlarged k bytes k bytes.extents thereby grew k bytes k bytes.user mode scheduling ums introduced handle sql server threads better windows preemptive multithreading also adding support fibers lightweight threads introduced nt .
History of Microsoft SQL Server
used avoid context switching.sql server .also introduced multidimensional database product called sql olap services became analysis services sql server .sql server .would last version run dec alpha platform.although prerelease versions sql well windows compiled alpha canceled never commercially released.
History of Microsoft SQL Server
mainstream support ended december extended support ended january .sql server sql server included modifications extensions sybase code base adding support ia architecture mainstream support.sql server legacy sybase code completely rewritten.since release sql server advances made performance client ide tools several comp...
History of Microsoft SQL Server
client tools enterprise manager would still need run bit x clients.first release sql ia version .. build date february .mainstream support ended april extended support ended april .sql server sql server formerly codenamed yukon released november .included native support managing xml data addition relational data.purpos...
History of Microsoft SQL Server
xml columns associated xsd schemas xml data stored verified schema.xml converted internal binary data type stored database.specialized indexing methods made available xml data.xml data queried using xquery sql server added extensions tsql language allow embedding xquery queries tsql.also defines new extension xquery ca...
History of Microsoft SQL Server
sql server also allows database server exposed web services using tabular data stream tds packets encapsulated within soap protocol requests.data accessed web services results returned xml.common language runtime clr integration introduced version enabling one write sql code managed code clr.relational data tsql augmen...
History of Microsoft SQL Server
permissions access control made granular query processor handles concurrent execution queries efficient way.partitions tables indexes supported natively scaling database onto cluster easier.sql clr introduced sql server let integrate .net framework.sql server introduced multiversion concurrency control mvcc.user facing...
History of Microsoft SQL Server
automatic failover requires witness partner operating mode synchronous also known highsafety full safety.database mirroring included first release sql server evaluation purposes only.prior sp enabled default supported microsoft.service pack released april service pack released february service pack released december sq...
History of Microsoft SQL Server
current versions multimedia data stored blobs binary large objects generic bitstreams.intrinsic awareness multimedia data allow specialized functions performed them.according paul flessner senior vice president server applications microsoft sql server data storage backend different varieties data xml email timecalendar...
History of Microsoft SQL Server
structured data metadata file stored sql server database whereas unstructured component stored file system.files accessed via win file handling apis well via sql server using tsql latter accesses file data blob.backing restoring database backs restores referenced files well.sql server also natively supports hierarchica...
History of Microsoft SQL Server
flat earth geometry planar data type represents geospatial data projected native spherical coordinate system plane.round earth data type geography uses ellipsoidal model earth defined single continuous entity suffer singularities international dateline poles map projection zone edges.approximately methods available rep...
History of Microsoft SQL Server
also includes capabilities transparent encryption data tde well compression backups.sql server supports ado.net entity framework reporting tools replication data definition built around entity data model.sql server reporting services gain charting capabilities integration data visualization products dundas data visuali...
History of Microsoft SQL Server
sql server also makes databases available via windows powershell providers management functionality available cmdlets server running instances managed windows powershell.final sql server service pack .. service pack released september .sql server r sql server r ... formerly codenamed kilimanjaro announced teched releas...
History of Microsoft SQL Server
second sql server r service pack .. service pack released july .final sql server r service pack .. service pack released september .sql r would last version sql server run itanium ia platform.however x platform would continue force.extended support sql server itanium would continue .sql server professional association ...
History of Microsoft SQL Server
released manufacturing march .sql server service pack released manufacturing november service pack released manufacturing june service pack released manufacturing december service pack released manufacturing october .it announced last version natively support ole db instead prefer odbc native connectivity.sql server ne...
History of Microsoft SQL Server
whilst small tables may entirely resident memory versions sql server also may reside disk work involved reserving ram writing evicted pages disk loading new pages disk locking pages ram operated many tasks.treating table guaranteed entirely resident memory much plumbing diskbased databases avoided.for diskbased sql ser...
End-to-end encryption
sql server microsoft launched sql server october nd along support linux.sql server microsoft launched sql server november th .sql server .x introduces big data clusters sql server.also provides additional capability improvements sql server database engine sql server analysis services sql server machine learning service...
End-to-end encryption
serverside disk encryption simply prevents unauthorized users viewing information.prevent company viewing information key simply decrypt data.allows third party provide search features scan illegal unacceptable content also means read misused anyone access stored messages third party system whether design via backdoor....
End-to-end encryption
etymology term term endtoend encryption originally meant communication never decrypted transport sender receiver.for example around eee proposed additional layer encryption gsm tetra addition existing radio encryption protecting communication mobile device network infrastructure.standardised sfpg tetra.note tetra eee k...
End-to-end encryption
systems guarantee protection communications clients servers meaning users trust third parties running servers sensitive content.endtoend encryption regarded safer reduces number parties might able interfere break encryption.case instant messaging users may use thirdparty client plugin implement endtoend encryption sche...
End-to-end encryption
however telegram still features endtoend encryption default endtoend encryption group chats endtoend encryption desktop clients.some encrypted backup file sharing services provide clientside encryption.encryption offer referred endtoend encryption services meant sharing messages users.however term endtoend encryption s...
End-to-end encryption
decrypting message snoop encrypt key share actual recipient public key case asymmetric systems send message avoid detection.known maninthemiddle attack mitm.authentication endtoend encryption protocols include form endpoint authentication specifically prevent mitm attacks.example one could rely certification authoritie...
End-to-end encryption
parties compare fingerprints using outside outofband communication channel guarantees integrity authenticity communication necessarily secrecy starting conversation.fingerprints match theory man middle.when displayed human inspection fingerprints usually use form binarytotext encoding.strings formatted groups character...
End-to-end encryption
protocol may choose display words users native system language.however make crosslanguage comparisons prone errors.in order improve localization protocols chosen display fingerprints base strings instead error prone hexadecimal natural language strings.example base fingerprint called safety number signal security code ...
End-to-end encryption
even perfectly encrypted communication pipe secure mailbox end.major attempts increase endpoint security isolate key generation storage cryptographic operations smart card googles project vault.however since plaintext input output still visible host system malware monitor conversations real time.robust approach isolate...
End-to-end encryption
however bruce schneier points stuxnet developed us israel successfully jumped air gap reached natanz nuclear plants network iran.deal key exfiltration malware one approach split trusted computing base behind two unidirectionally connected computers prevent either insertion malware exfiltration sensitive data inserted m...
End-to-end encryption
company however refused create backdoor government citing concern tool could pose risk consumers privacy.compliance regulatory requirements content inspection eee offer privacy benefits make desirable consumergrade services many businesses balance benefits regulatory requirements.example many organizations subject mand...
End-to-end encryption
see also comparison instant messaging protocolscomparison voip software Β§ secure voip software – table overview voip clients offer endtoend encryptiondiffie–hellman key exchangeendtoend auditable voting systemspointtopoint encryption references reading ermoshina ksenia musiani francesca halpin harry september .endtoend...
List of Google products
florence italy springer.pp.–.doi.. isbn .active soontobe discontinued discontinued products services tools hardware applications broken designated sections.webbased products search tools google search – web search engine googles core product.google alerts – email notification service sends alerts based chosen search te...
List of Google products
communication publishing tools blogger – weblog publishing tool.feedburner – tool news feed management services including feed traffic analysis advertising facilities.gmail – email service.google account – controls user appears presents google products.google calendar – online calendar gmail integration calendar sharin...
List of Google products
webmasters optimize ad campaigns based statistics.analytics based urchin software.google surveys – market research tool.firebase – open creative commons attribution licensed collection structured data freebase platform accessing manipulating data via freebase api.google ngram viewer – charts yearbyyear frequencies set ...
List of Google products
google trends websites subsection shows popularity websites time.google activity report – monthly report including statistics users google usage signin third party authentication changes gmail usage calendar search history youtube.google data studio online tool converting data customizable informative reports dashboard...
List of Google products
replaced gyp chromium.gerrit – code collaboration tool.googletest – testing framework c.bazel – build system.flatbuffers – serialization library.protocol buffers serialization library similar flatbuffers.shaderc tools library compiling hlsl glsl spirv.american fuzzy lop – securityoriented fuzzer.google guava – core lib...
List of Google products
models nexus one – .phone running android .gingerbreadnexus – phone running android .jelly beannest learning thermostat first generation – smart thermostatgalaxy nexus – .phone running android .
List of Google products
jelly beannexus q – media streaming entertainment device google nexus product familynexus – tablet running android .lollipopnexus – tablet running android .lollipopnest learning thermostat second generation – smart thermostatnexus – .phone running android .lollipopchromebook pixel β€” laptop running chrome osnexus – tabl...
List of Google products
marshmallowchromecast first generation – media streaming adapternexus – .phone running android .marshmallownest protect first generation – smoke alarmnexus – .phone running android .. nougatnexus – tablet running android .nougatnexus player – streaming media player running android .
List of Google products
oreochromebook pixel β€” laptop running chrome osnest cam indoor – security cameranest protect second generation – smoke alarmnest learning thermostat third generation – smart thermostatnexus x – phone running android .oreonexus p – .phone running android .oreopixel c – .convertible tablet running android .
List of Google products
oreochromecast second generation – digital media playerchromecast audio – audio streaming adapternest cam outdoor – security camerapixel – smartphone running android pixel xl – .smartphone running android daydream view first generation – virtual reality headset smartphonesgoogle home – smart speakergoogle wifi – wirele...
List of Google products
smartphone running android pixel xl – .smartphone running android pixelbook go – laptop running chrome osnest mini – smart speakernest wifi – wireless routerpixel buds second generation – wireless earbudspixel – .smartphone running android pixel g – .smartphone running android pixel – smartphone running android nest au...
List of Google products
smartphone running android pixel pro – .smartphone running android processors pixel visual core pixel titan pixel pixel neural core pixel titan c pixelbook gogoogle tensor pixel services google cloud platform – modular cloudbased services software development.google crisis response – public project covers disasters tur...
List of Google products
scheduled shut early .discontinued products services google retired many offerings either obsolescence integration google products lack interest.googles discontinued offerings colloquially referred google graveyard.android things – part google internet things iot.shut january .
List of Google products
angularjs – open source web application framework.shut december .google clips – miniature clipon camera device.pulled google store october .discontinued december .my maps – android app enabled users create custom maps personal use sharing mobile device.shut october users asked migrate mobile web version app.google book...
List of Google products
discontinued september .tour builder – allowed users create share interactive tours inside google earth.shut july replaced new creation tools google earth.poly – service browse share download models.shut june .google expeditions virtual reality vr platform designed educational institutions.discontinued june .majority e...
List of Google products
shut june .timely – android app provided alarm stopwatch timer functions synchronization across devices.timely servers shut may .google go links – url shortening service also supported custom domain customers google workspace.discontinued april .google public alerts – online notification service sent safety alerts vari...
List of Google products
improvements google search maps rendered service redundant.google app maker – allowed users develop apps businesses.shut january .google cloud print – cloudbased printing solution beta since .discontinued december .google play music – googles music streaming service.discontinued december replaced youtube music google p...
List of Google products
discontinued removed google store october though continue functioning.google station – service allowed users spread wifi hotspots.shut september .hire google – applicant tracking system recruiting software.shut september .password checkup – extension warned breached thirdparty logins.shut july integrated chrome.google ...
List of Google products
shut may.neighbourly – experimental mobile app designed help learn neighborhood asking residents.shut may .fabric – modular sdk platform launched crashlytics .google acquired crashlytics announced plans migrate features firebase.shut may .material theme editor – plugin sketch app allowed create materialbased design sys...
List of Google products
discontinued february .one today – app allowed users donate different organizations discover donation would used.discontinued january.androidify – allowed users create custom android avatar.discontinued january.chromecast audio – variation secondgeneration chromecast designed use audio streaming apps.discontinued janua...
List of Google products
january existing annotations removed youtube.mr.jingles – googles notifications widget.discontinued march .google allo – googles instant messaging app.discontinued march .google image charts – chartmaking service provided images rendered chart data accessed rest calls.service deprecated temporarily disabled february di...
List of Google products
started turn support march discontinued march .inbox gmail – email application android ios web platform organized automated todo lists using email content.april accessing inbox subdomain redirects gmail proper.google – consumer edition googles social media platform.april users receive message stating google longer avai...
List of Google products
support ended august .youtube nintendo ds – official app nintendo ds.discontinued september .youtube messages – direct messages youtube – discontinued september .youtube leanback – web application control remote intended use smart tvs similar devices.discontinued october .google daydream view – googles vr headset first...
List of Google products
shut november .google fusion tables – service managing visualizing data.service shut december .google translator toolkit – online computerassisted translation tool designed allow translators edit translations automatically generated google translate.shut december citing declining usage availability similar tools.google...
List of Google products
discontinued december .datally – lets users save mobile data – removed play store october .build chrome – initiative lego google build world using lego.discontinued march blogger web comments firefox – displays related comments blogger users.google portfolios – personal financial securities tracker.deprecated november ...
List of Google products
trends generated google talks share music status feature.google personalized search – search results personalization merged google accounts web history.photos screensaver – slideshow screensaver part google pack displays images sourced hard disk rss atom web feeds.rebang google china – search trend site similar google ...
List of Google products
appeared google labs disappeared following day undisclosed reasons.accessible search – search engine visually impaired.quick search box – search box based quicksilver easing access installed applications online searches.visigami – image search application screen saver searches files google images picasa flickr.wireless...
List of Google products
discontinued february .google swiffy – convert adobe flash files swf html.discontinued july .google nexus – smartphone lineup – replaced google pixel october free search – embed siteweb search users website.replaced google custom search.google hands free – retail checkout without using phone watch.pilot started bay are...
List of Google products
discontinued april replaced google maps google local guides.trendalyzer – data trend viewing platform.discontinued september.google code – open source code hosting.discontinued january renamed google developers.picasa – photo organization editing application.closed march replaced google photos.google compare – comparis...
List of Google products
discontinued november .mytracks – gps logging.shut april .project ara – initiative build phone interchangeable modules various components like cameras batteries suspended streamline companys seemingly disorganized product lineup.september .panoramio – geolocationoriented photo sharing website.discontinued november .goo...
List of Google products
deactivated december .google moderator – rank usersubmitted questions suggestions ideas via crowdsourcing.discontinued june .wildfire google – social media marketing softwarebebapay – prepaid ticket payment system.discontinued march .google helpouts – hangoutbased live video chat experts.discontinued april .google eart...
List of Google products
discontinued march .google earth plugin – customize google earth.discontinued december .speak tweet – telephone service created collaboration twitter saynow allowing users phone specific number leave voicemail tweet automatically posted twitter.discontinued sometime .google questions answers – communitydriven knowledge...
List of Google products
discontinued september .googles discussion search option.discontinued july.quickoffice – productivity suite mobile devices.discontinued june merged google drive.google tv – smart tv platform based android.discontinued replaced android tv june.google offers – service offering discounts coupons.shut march .google chrome ...
List of Google products
discontinued february .google schemer – social search find local activities.discontinued february .youtube speed.discontinued january replaced google video quality report.google notifier – alerted users new messages gmail account.discontinued january .maps gis tools google maps.google currents – magazine app.
List of Google products
merged google play newsstand november .google checkout – online payment processing service aimed simplifying process paying online purchases.discontinued november merged google wallet.igoogle – customisable homepage contain web feeds google gadgets.discontinued november .google latitude – mobile geolocation tool lets f...
List of Google products
discontinued june .google talk – instant messaging service provided text voice communication.replaced may google hangouts.sms search – mobile phone short message service.discontinued may .google cloud connect – microsoft office plugin automatically backing office documents upon saving onto google docs.discontinued apri...
List of Google products
synchronization existing installations stopped august .replaced google sync synchronize outlook calendars sync email using imap pop.also google apps business education government customers use google apps sync microsoft outlook picasa web albums uploader – upload images picasa web albums service.consisted iphoto plugin...