_id stringlengths 2 7 | text stringlengths 6 2.61k | title stringclasses 1
value |
|---|---|---|
c175100 | // Value returns the value associated with the iterator. | |
c175101 | // Next returns the next element. If it is the same as the current key, ignore it. | |
c175102 | // Seek brings us to element with key >= given key. | |
c175103 | // Close implements y.Iterator | |
c175104 | // Encode encodes Pointer into byte buffer. | |
c175105 | // Decodes h from buf. | |
c175106 | // Encodes e to buf. Returns number of bytes written. | |
c175107 | // SetEntry is the equivalent of Txn.SetEntry. | |
c175108 | // Set is equivalent of Txn.SetWithMeta. | |
c175109 | // SetWithTTL is equivalent of Txn.SetWithTTL. | |
c175110 | // Delete is equivalent of Txn.Delete. | |
c175111 | // Caller to commit must hold a write lock. | |
c175112 | // Flush must be called at the end to ensure that any pending writes get committed to Badger. Flush
// returns any error stored by WriteBatch. | |
c175113 | // Error returns any errors encountered so far. No commits would be run once an error is detected. | |
c175114 | // getMemtables returns the current memtables and get references. | |
c175115 | // writeRequests is called serially by only one goroutine. | |
c175116 | // ensureRoomForWrite is always called serially. | |
c175117 | // WriteLevel0Table flushes memtable. | |
c175118 | // handleFlushTask must be run serially. | |
c175119 | // flushMemtable must keep running until we send it an empty flushTask. If there
// are errors during handling the flush task, we'll retry indefinitely. | |
c175120 | // This function does a filewalk, calculates the size of vlog and sst files and stores it in
// y.LSMSize and y.VlogSize. | |
c175121 | // Size returns the size of lsm and value log files in bytes. It can be used to decide how often to
// call RunValueLogGC. | |
c175122 | // Next would return the next integer in the sequence, updating the lease by running a transaction
// if needed. | |
c175123 | // Release the leased sequence to avoid wasted integers. This should be done right
// before closing the associated DB. However it is valid to use the sequence after
// it was released, causing a new lease with full bandwidth. | |
c175124 | // KeySplits can be used to get rough key ranges to divide up iteration over
// the DB. | |
c175125 | // Flatten can be used to force compactions on the LSM tree so all the tables fall on the same
// level. This ensures that all the versions of keys are colocated and not split across multiple
// levels, which is necessary after a restore from backup. During Flatten, live compactions are
// stopped. Ideally, no writes a... | |
c175126 | // Mmap uses the mmap system call to memory-map a file. If writable is true,
// memory protection of the pages is set so that they may be written to as well. | |
c175127 | // Madvise uses the madvise system call to give advise about the use of memory
// when using a slice that is memory-mapped to a file. Set the readahead flag to
// false if page references are expected in random order. | |
c175128 | // Any deleted or invalid versions at or below ts would be discarded during
// compaction to reclaim disk space in LSM tree and thence value log. | |
c175129 | // hasConflict must be called while having a lock. | |
c175130 | // Set adds a key-value pair to the database.
//
// It will return ErrReadOnlyTxn if update flag was set to false when creating the
// transaction.
//
// The current transaction keeps a reference to the key and val byte slice
// arguments. Users must not modify key and val until the end of the transaction. | |
c175131 | // SetWithMeta adds a key-value pair to the database, along with a metadata
// byte.
//
// This byte is stored alongside the key, and can be used as an aid to
// interpret the value or store other contextual bits corresponding to the
// key-value pair.
//
// The current transaction keeps a reference to the key and val ... | |
c175132 | // Delete deletes a key.
//
// This is done by adding a delete marker for the key at commit timestamp. Any
// reads happening before this timestamp would be unaffected. Any reads after
// this commit would see the deletion.
//
// The current transaction keeps a reference to the key byte slice argument.
// Users must n... | |
c175133 | // Get looks for key and returns corresponding Item.
// If key is not found, ErrKeyNotFound is returned. | |
c175134 | // CommitWith acts like Commit, but takes a callback, which gets run via a
// goroutine to avoid blocking this function. The callback is guaranteed to run,
// so it is safe to increment sync.WaitGroup before calling CommitWith, and
// decrementing it in the callback; to block until all callbacks are run. | |
c175135 | // View executes a function creating and managing a read-only transaction for the user. Error
// returned by the function is relayed by the View method.
// If View is used with managed transactions, it would assume a read timestamp of MaxUint64. | |
c175136 | // Update executes a function, creating and managing a read-write transaction
// for the user. Error returned by the function is relayed by the Update method.
// Update cannot be used with managed transactions. | |
c175137 | // Seek brings us to the first block element that is >= input key. | |
c175138 | // SeekToLast brings us to the last element. Valid should return true. | |
c175139 | // parseKV would allocate a new byte slice for key and for value. | |
c175140 | // NewIterator returns a new iterator of the Table | |
c175141 | // seekFrom brings us to a key that is >= input key. | |
c175142 | // seekForPrev will reset iterator and seek to <= key. | |
c175143 | // Value follows the y.Iterator interface | |
c175144 | // Seek follows the y.Iterator interface | |
c175145 | // NewConcatIterator creates a new concatenated iterator | |
c175146 | // Valid implements y.Interface | |
c175147 | // Next advances our concat iterator. | |
c175148 | // Close implements y.Interface. | |
c175149 | // OpenExistingFile opens an existing file, errors if it doesn't exist. | |
c175150 | // Copy copies a byte slice and returns the copied slice. | |
c175151 | // KeyWithTs generates a new key by appending ts to key. | |
c175152 | // ParseTs parses the timestamp from the key bytes. | |
c175153 | // ParseKey parses the actual key from the key bytes. | |
c175154 | // SameKey checks for key equality ignoring the version timestamp suffix. | |
c175155 | // FixedDuration returns a string representation of the given duration with the
// hours, minutes, and seconds. | |
c175156 | // NewCloser constructs a new Closer, with an initial count on the WaitGroup. | |
c175157 | // NewThrottle creates a new throttle with a max number of workers. | |
c175158 | // Do should be called by workers before they start working. It blocks if there
// are already maximum number of workers working. If it detects an error from
// previously Done workers, it would return it. | |
c175159 | // Done should be called by workers when they finish working. They can also
// pass the error status of work done. | |
c175160 | // Finish waits until all workers have finished working. It would return any
// error passed by Done. | |
c175161 | // SetDiscardTs sets a timestamp at or below which, any invalid or deleted
// versions can be discarded from the LSM tree, and thence from the value log to
// reclaim disk space. Can only be used with managed transactions. | |
c175162 | // openReadOnly assumes that we have a write lock on logFile. | |
c175163 | // iterate iterates over log file. It doesn't not allocate new memory for every kv pair.
// Therefore, the kv pair is only valid for the duration of fn call. | |
c175164 | // sortedFids returns the file id's not pending deletion, sorted. Assumes we have shared access to
// filesMap. | |
c175165 | // write is thread-unsafe by design and should not be called concurrently. | |
c175166 | // populateDiscardStats populates vlog.lfDiscardStats
// This function will be called while initializing valueLog | |
c175167 | // Backup is a wrapper function over Stream.Backup to generate full and incremental backups of the
// DB. For more control over how many goroutines are used to generate the backup, or if you wish to
// backup only a certain range of keys, use Stream.Backup directly. | |
c175168 | // ToList is a default implementation of KeyToList. It picks up all valid versions of the key,
// skipping over deleted or expired keys. | |
c175169 | // keyRange is [start, end), including start, excluding end. Do ensure that the start,
// end byte slices are owned by keyRange struct. | |
c175170 | // produceKVs picks up ranges from rangeCh, generates KV lists and sends them to kvChan. | |
c175171 | // Orchestrate runs Stream. It picks up ranges from the SSTables, then runs NumGo number of
// goroutines to iterate over these ranges and batch up KVs in lists. It concurrently runs a single
// goroutine to pick these lists, batch them up further and send to Output.Send. Orchestrate also
// spits logs out to Infof, us... | |
c175172 | // NewStreamAt creates a new Stream at a particular timestamp. Should only be used with managed DB. | |
c175173 | // DecrRef decrements the refcount and possibly deletes the table | |
c175174 | // ParseFileID reads the file id out of a filename. | |
c175175 | // PrintHistogram builds and displays the key-value size histogram.
// When keyPrefix is set, only the keys that have prefix "keyPrefix" are
// considered for creating the histogram | |
c175176 | // newSizeHistogram returns a new instance of keyValueSizeHistogram with
// properly initialized fields. | |
c175177 | // buildHistogram builds the key-value size histogram.
// When keyPrefix is set, only the keys that have prefix "keyPrefix" are
// considered for creating the histogram | |
c175178 | // printHistogram prints the histogram data in a human-readable format. | |
c175179 | // Init initializes a WaterMark struct. MUST be called before using it. | |
c175180 | // Begin sets the last index to the given value. | |
c175181 | // BeginMany works like Begin but accepts multiple indices. | |
c175182 | // Done sets a single index as done. | |
c175183 | // DoneMany works like Done but accepts multiple indices. | |
c175184 | // SetDoneUntil sets the maximum index that has the property that all indices
// less than or equal to it are done. | |
c175185 | // WaitForMark waits until the given index is marked as done. | |
c175186 | // Encode encodes the header. | |
c175187 | // Decode decodes the header. | |
c175188 | // NewTableBuilder makes a new TableBuilder. | |
c175189 | // keyDiff returns a suffix of newKey that is different from b.baseKey. | |
c175190 | // Add adds a key-value pair to the block.
// If doNotRestart is true, we will not restart even if b.counter >= restartInterval. | |
c175191 | // blockIndex generates the block index for the table.
// It is mainly a list of all the block base offsets. | |
c175192 | // Finish finishes the table by appending the index. | |
c175193 | // Errorf logs an ERROR log message to the logger specified in opts or to the
// global logger if no logger is specified in opts. | |
c175194 | // Infof logs an INFO message to the logger specified in opts. | |
c175195 | // DecrRef decrements the refcount, deallocating the Skiplist when done using it | |
c175196 | // NewSkiplist makes a new empty skiplist, with a given arena size | |
c175197 | // Put inserts the key-value pair. | |
c175198 | // Get gets the value associated with the key. It returns a valid value if it finds equal or earlier
// version of the same key. | |
c175199 | // Key returns the key at the current position. |
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