tsm1

package
v0.13.1-0...-ee4267b Latest Latest
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 Go to latest Published: Jun 2, 2016 License: MIT Imports: 30 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	CompactionTempExtension = "tmp"
	TSMFileExtension        = "tsm"
)
View Source 
const (
	// BlockFloat64 designates a block encodes float64 values
	BlockFloat64 = byte(0)

	// BlockInteger designates a block encodes int64 values
	BlockInteger = byte(1)

	// BlockBoolean designates a block encodes boolean values
	BlockBoolean = byte(2)

	// BlockString designates a block encodes string values
	BlockString = byte(3)
)
View Source 
const (
	// DefaultSegmentSize of 10MB is the size at which segment files will be rolled over
	DefaultSegmentSize = 10 * 1024 * 1024

	// FileExtension is the file extension we expect for wal segments
	WALFileExtension = "wal"

	WALFilePrefix = "_"
)
View Source 
const (
	// MagicNumber is written as the first 4 bytes of a data file to
	// identify the file as a tsm1 formatted file
	MagicNumber uint32 = 0x16D116D1

	Version byte = 1
)

Variables

View Source 
var (
	ErrCacheMemoryExceeded    = fmt.Errorf("cache maximum memory size exceeded")
	ErrCacheInvalidCheckpoint = fmt.Errorf("invalid checkpoint")
	ErrSnapshotInProgress     = fmt.Errorf("snapshot in progress")
)
View Source 
var (
	MaxTime = time.Unix(0, math.MaxInt64)
	MinTime = time.Unix(0, 0)
)
View Source 
var (
	ErrWALClosed  = fmt.Errorf("WAL closed")
	ErrWALCorrupt = fmt.Errorf("corrupted WAL entry")
)
View Source 
var (
	ErrNoValues             = fmt.Errorf("no values written")
	ErrTSMClosed            = fmt.Errorf("tsm file closed")
	ErrMaxKeyLengthExceeded = fmt.Errorf("max key length exceeded")
	ErrMaxBlocksExceeded    = fmt.Errorf("max blocks exceeded")
)

Functions

func BlockCount 

func BlockCount(block []byte) int

func BlockType 

func BlockType(block []byte) (byte, error)

BlockType returns the type of value encoded in a block or an error if the block type is unknown.

func CountTimestamps 

func CountTimestamps(b []byte) int

func NewEngine 

func NewEngine(path string, walPath string, opt tsdb.EngineOptions) tsdb.Engine

NewEngine returns a new instance of Engine.

func NewIndirectIndex 

func NewIndirectIndex() *indirectIndex

func NewMultiFieldCursor 

func NewMultiFieldCursor(fields []string, cursors []tsdb.Cursor, ascending bool) tsdb.Cursor

NewMultiFieldCursor returns an instance of Cursor that joins the results of cursors.

func ParseTSMFileName 

func ParseTSMFileName(name string) (int, int, error)

ParseTSMFileName parses the generation and sequence from a TSM file name.

func SeriesFieldKey 

func SeriesFieldKey(seriesKey, field string) string

SeriesFieldKey combine a series key and field name for a unique string to be hashed to a numeric ID

func ZigZagDecode 

func ZigZagDecode(v uint64) int64

ZigZagDecode converts a previously zigzag encoded uint64 back to a int64

func ZigZagEncode 

func ZigZagEncode(x int64) uint64

ZigZagEncode converts a int64 to a uint64 by zig zagging negative and positive values across even and odd numbers. Eg. [0,-1,1,-2] becomes [0, 1, 2, 3]

Types

type BitReader 

type BitReader struct {
	// contains filtered or unexported fields
}

BitReader reads bits from an io.Reader.

func NewBitReader 

func NewBitReader(data []byte) *BitReader

NewBitReader returns a new instance of BitReader that reads from data.

func (*BitReader) CanReadBitFast 

func (r *BitReader) CanReadBitFast() bool

CanReadBitFast returns true if calling ReadBitFast() is allowed. Fast bit reads are allowed when at least 2 values are in the buffer. This is because it is not required to refilled the buffer and the caller can inline the calls.

func (*BitReader) ReadBit 

func (r *BitReader) ReadBit() (bool, error)

ReadBit returns the next bit from the underlying data.

func (*BitReader) ReadBitFast 

func (r *BitReader) ReadBitFast() bool

ReadBitFast is an optimized bit read. IMPORTANT: Only allowed if CanReadFastBit() is true!

func (*BitReader) ReadBits 

func (r *BitReader) ReadBits(nbits uint) (uint64, error)

ReadBits reads nbits from the underlying data.

func (*BitReader) Reset 

func (r *BitReader) Reset(data []byte)

Reset sets the underlying reader on b and reinitializes.

type BlockIterator 

type BlockIterator struct {
	// contains filtered or unexported fields
}

BlockIterator allows iterating over each block in a TSM file in order. It provides raw access to the block bytes without decoding them.

func (*BlockIterator) Next 

func (b *BlockIterator) Next() bool

func (*BlockIterator) PeekNext 

func (b *BlockIterator) PeekNext() string

func (*BlockIterator) Read 

func (b *BlockIterator) Read() (string, int64, int64, uint32, []byte, error)

type BooleanDecoder 

type BooleanDecoder struct {
	// contains filtered or unexported fields
}

BooleanDecoder decodes a series of booleans from an in-memory buffer.

func (*BooleanDecoder) Error 

func (e *BooleanDecoder) Error() error

func (*BooleanDecoder) Next 

func (e *BooleanDecoder) Next() bool

func (*BooleanDecoder) Read 

func (e *BooleanDecoder) Read() bool

func (*BooleanDecoder) SetBytes 

func (e *BooleanDecoder) SetBytes(b []byte)

SetBytes initializes the decoder with a new set of bytes to read from. This must be called before calling any other methods.

type BooleanEncoder 

type BooleanEncoder struct {
	// contains filtered or unexported fields
}

BooleanEncoder encodes a series of booleans to an in-memory buffer.

func NewBooleanEncoder 

func NewBooleanEncoder() BooleanEncoder

NewBooleanEncoder returns a new instance of BooleanEncoder.

func (*BooleanEncoder) Bytes 

func (e *BooleanEncoder) Bytes() ([]byte, error)

func (*BooleanEncoder) Write 

func (e *BooleanEncoder) Write(b bool)

type BooleanValue 

type BooleanValue struct {
	// contains filtered or unexported fields
}

func DecodeBooleanBlock 

func DecodeBooleanBlock(block []byte, tdec *TimeDecoder, vdec *BooleanDecoder, a *[]BooleanValue) ([]BooleanValue, error)

func (*BooleanValue) Size 

func (b *BooleanValue) Size() int

func (*BooleanValue) String 

func (f *BooleanValue) String() string

func (*BooleanValue) UnixNano 

func (b *BooleanValue) UnixNano() int64

func (*BooleanValue) Value 

func (b *BooleanValue) Value() interface{}

type BooleanValues 

type BooleanValues []BooleanValue

BooleanValues represents a slice of Boolean values.

func (BooleanValues) Deduplicate 

func (a BooleanValues) Deduplicate() BooleanValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (BooleanValues) Exclude 

func (a BooleanValues) Exclude(min, max int64) BooleanValues

Exclude returns the subset of values not in [min, max]

func (BooleanValues) Include 

func (a BooleanValues) Include(min, max int64) BooleanValues

Include returns the subset values between min and max inclusive.

func (BooleanValues) Len 

func (a BooleanValues) Len() int

Sort methods

func (BooleanValues) Less 

func (a BooleanValues) Less(i, j int) bool

func (BooleanValues) MaxTime 

func (a BooleanValues) MaxTime() int64

func (BooleanValues) Merge 

func (a BooleanValues) Merge(b BooleanValues) BooleanValues

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (BooleanValues) MinTime 

func (a BooleanValues) MinTime() int64

func (BooleanValues) Size 

func (a BooleanValues) Size() int

func (BooleanValues) Swap 

func (a BooleanValues) Swap(i, j int)

type Cache 

type Cache struct {
	// contains filtered or unexported fields
}

Cache maintains an in-memory store of Values for a set of keys.

func NewCache 

func NewCache(maxSize uint64, path string) *Cache

NewCache returns an instance of a cache which will use a maximum of maxSize bytes of memory. Only used for engine caches, never for snapshots

func (*Cache) ClearSnapshot 

func (c *Cache) ClearSnapshot(success bool)

ClearSnapshot will remove the snapshot cache from the list of flushing caches and adjust the size

func (*Cache) Deduplicate 

func (c *Cache) Deduplicate()

Deduplicate sorts the snapshot before returning it. The compactor and any queries coming in while it writes will need the values sorted

func (*Cache) Delete 

func (c *Cache) Delete(keys []string)

Delete will remove the keys from the cache

func (*Cache) DeleteRange 

func (c *Cache) DeleteRange(keys []string, min, max int64)

DeleteRange will remove the values for all keys containing points between min and max from the cache.

func (*Cache) Keys 

func (c *Cache) Keys() []string

Keys returns a sorted slice of all keys under management by the cache.

func (*Cache) MaxSize 

func (c *Cache) MaxSize() uint64

MaxSize returns the maximum number of bytes the cache may consume.

func (*Cache) RLock 

func (c *Cache) RLock()

func (*Cache) RUnlock 

func (c *Cache) RUnlock()

func (*Cache) SetMaxSize 

func (c *Cache) SetMaxSize(size uint64)

func (*Cache) Size 

func (c *Cache) Size() uint64

Size returns the number of point-calcuated bytes the cache currently uses.

func (*Cache) Snapshot 

func (c *Cache) Snapshot() (*Cache, error)

Snapshot will take a snapshot of the current cache, add it to the slice of caches that are being flushed, and reset the current cache with new values

func (*Cache) Store 

func (c *Cache) Store() map[string]*entry

Store returns the underlying cache store. This is not goroutine safe! Protect access by using the Lock and Unlock functions on Cache.

func (*Cache) UpdateAge 

func (c *Cache) UpdateAge()

Updates the age statistic

func (*Cache) UpdateCompactTime 

func (c *Cache) UpdateCompactTime(d time.Duration)

Updates WAL compaction time statistic

func (*Cache) Values 

func (c *Cache) Values(key string) Values

Values returns a copy of all values, deduped and sorted, for the given key.

func (*Cache) Write 

func (c *Cache) Write(key string, values []Value) error

Write writes the set of values for the key to the cache. This function is goroutine-safe. It returns an error if the cache has exceeded its max size.

func (*Cache) WriteMulti 

func (c *Cache) WriteMulti(values map[string][]Value) error

WriteMulti writes the map of keys and associated values to the cache. This function is goroutine-safe. It returns an error if the cache has exceeded its max size.

type CacheLoader 

type CacheLoader struct {
	Logger *log.Logger
	// contains filtered or unexported fields
}

CacheLoader processes a set of WAL segment files, and loads a cache with the data contained within those files. Processing of the supplied files take place in the order they exist in the files slice.

func NewCacheLoader 

func NewCacheLoader(files []string) *CacheLoader

NewCacheLoader returns a new instance of a CacheLoader.

func (*CacheLoader) Load 

func (cl *CacheLoader) Load(cache *Cache) error

Load returns a cache loaded with the data contained within the segment files. If, during reading of a segment file, corruption is encountered, that segment file is truncated up to and including the last valid byte, and processing continues with the next segment file.

func (*CacheLoader) SetLogOutput 

func (cl *CacheLoader) SetLogOutput(w io.Writer)

SetLogOutput sets the logger used for all messages. It must not be called after the Open method has been called.

type CompactionGroup 

type CompactionGroup []string

type CompactionPlanner 

type CompactionPlanner interface {
	Plan(lastWrite time.Time) []CompactionGroup
	PlanLevel(level int) []CompactionGroup
}

CompactionPlanner determines what TSM files and WAL segments to include in a given compaction run.

type Compactor 

type Compactor struct {
	Dir  string
	Size int

	FileStore interface {
		NextGeneration() int
	}
	// contains filtered or unexported fields
}

Compactor merges multiple TSM files into new files or writes a Cache into 1 or more TSM files

func (*Compactor) Close 

func (c *Compactor) Close()

func (*Compactor) CompactFast 

func (c *Compactor) CompactFast(tsmFiles []string) ([]string, error)

Compact will write multiple smaller TSM files into 1 or more larger files

func (*Compactor) CompactFull 

func (c *Compactor) CompactFull(tsmFiles []string) ([]string, error)

Compact will write multiple smaller TSM files into 1 or more larger files

func (*Compactor) Open 

func (c *Compactor) Open()

func (*Compactor) WriteSnapshot 

func (c *Compactor) WriteSnapshot(cache *Cache) ([]string, error)

WriteSnapshot will write a Cache snapshot to a new TSM files.

type DefaultPlanner 

type DefaultPlanner struct {
	FileStore interface {
		Stats() []FileStat
		LastModified() time.Time
		BlockCount(path string, idx int) int
	}

	// CompactFullWriteColdDuration specifies the length of time after
	// which if no writes have been committed to the WAL, the engine will
	// do a full compaction of the TSM files in this shard. This duration
	// should always be greater than the CacheFlushWriteColdDuraion
	CompactFullWriteColdDuration time.Duration
	// contains filtered or unexported fields
}

DefaultPlanner implements CompactionPlanner using a strategy to roll up multiple generations of TSM files into larger files in stages. It attempts to minimize the number of TSM files on disk while rolling up a bounder number of files.

func (*DefaultPlanner) Plan 

func (c *DefaultPlanner) Plan(lastWrite time.Time) []CompactionGroup

Plan returns a set of TSM files to rewrite for level 4 or higher. The planning returns multiple groups if possible to allow compactions to run concurrently.

func (*DefaultPlanner) PlanLevel 

func (c *DefaultPlanner) PlanLevel(level int) []CompactionGroup

PlanLevel returns a set of TSM files to rewrite for a specific level

type DeleteRangeWALEntry 

type DeleteRangeWALEntry struct {
	Keys     []string
	Min, Max int64
}

DeleteRangeWALEntry represents the deletion of multiple series.

func (*DeleteRangeWALEntry) Encode 

func (w *DeleteRangeWALEntry) Encode(b []byte) ([]byte, error)

func (*DeleteRangeWALEntry) MarshalBinary 

func (w *DeleteRangeWALEntry) MarshalBinary() ([]byte, error)

func (*DeleteRangeWALEntry) Type 

func (w *DeleteRangeWALEntry) Type() WalEntryType

func (*DeleteRangeWALEntry) UnmarshalBinary 

func (w *DeleteRangeWALEntry) UnmarshalBinary(b []byte) error

type DeleteWALEntry 

type DeleteWALEntry struct {
	Keys []string
}

DeleteWALEntry represents the deletion of multiple series.

func (*DeleteWALEntry) Encode 

func (w *DeleteWALEntry) Encode(dst []byte) ([]byte, error)

func (*DeleteWALEntry) MarshalBinary 

func (w *DeleteWALEntry) MarshalBinary() ([]byte, error)

func (*DeleteWALEntry) Type 

func (w *DeleteWALEntry) Type() WalEntryType

func (*DeleteWALEntry) UnmarshalBinary 

func (w *DeleteWALEntry) UnmarshalBinary(b []byte) error

type EmptyValue 

type EmptyValue struct {
}

func (*EmptyValue) Size 

func (e *EmptyValue) Size() int

func (*EmptyValue) String 

func (e *EmptyValue) String() string

func (*EmptyValue) UnixNano 

func (e *EmptyValue) UnixNano() int64

func (*EmptyValue) Value 

func (e *EmptyValue) Value() interface{}

type Engine 

type Engine struct {
	WAL            *WAL
	Cache          *Cache
	Compactor      *Compactor
	CompactionPlan CompactionPlanner
	FileStore      *FileStore

	MaxPointsPerBlock int

	// CacheFlushMemorySizeThreshold specifies the minimum size threshodl for
	// the cache when the engine should write a snapshot to a TSM file
	CacheFlushMemorySizeThreshold uint64

	// CacheFlushWriteColdDuration specifies the length of time after which if
	// no writes have been committed to the WAL, the engine will write
	// a snapshot of the cache to a TSM file
	CacheFlushWriteColdDuration time.Duration
	// contains filtered or unexported fields
}

Engine represents a storage engine with compressed blocks.

func (*Engine) Backup 

func (e *Engine) Backup(w io.Writer, basePath string, since time.Time) error

Backup will write a tar archive of any TSM files modified since the passed in time to the passed in writer. The basePath will be prepended to the names of the files in the archive. It will force a snapshot of the WAL first then perform the backup with a read lock against the file store. This means that new TSM files will not be able to be created in this shard while the backup is running. For shards that are still acively getting writes, this could cause the WAL to backup, increasing memory usage and evenutally rejecting writes.

func (*Engine) Close 

func (e *Engine) Close() error

Close closes the engine. Subsequent calls to Close are a nop.

func (*Engine) ContainsSeries 

func (e *Engine) ContainsSeries(keys []string) (map[string]bool, error)

ContainsSeries returns a map of keys indicating whether the key exists and has values or not.

func (*Engine) CreateIterator 

func (e *Engine) CreateIterator(opt influxql.IteratorOptions) (influxql.Iterator, error)

func (*Engine) CreateSnapshot 

func (e *Engine) CreateSnapshot() (string, error)

CreateSnapshot will create a temp directory that holds temporary hardlinks to the underylyng shard files

func (*Engine) DeleteMeasurement 

func (e *Engine) DeleteMeasurement(name string, seriesKeys []string) error

DeleteMeasurement deletes a measurement and all related series.

func (*Engine) DeleteSeries 

func (e *Engine) DeleteSeries(seriesKeys []string) error

DeleteSeries removes all series keys from the engine.

func (*Engine) DeleteSeriesRange 

func (e *Engine) DeleteSeriesRange(seriesKeys []string, min, max int64) error

DeleteSeriesRange removes the values between min and max (inclusive) from all series.

func (*Engine) Format 

func (e *Engine) Format() tsdb.EngineFormat

Format returns the format type of this engine

func (*Engine) Index 

func (e *Engine) Index() *tsdb.DatabaseIndex

Index returns the database index.

func (*Engine) KeyCursor 

func (e *Engine) KeyCursor(key string, t int64, ascending bool) *KeyCursor

func (*Engine) LoadMetadataIndex 

func (e *Engine) LoadMetadataIndex(shardID uint64, index *tsdb.DatabaseIndex) error

LoadMetadataIndex loads the shard metadata into memory.

func (*Engine) MeasurementFields 

func (e *Engine) MeasurementFields(measurement string) *tsdb.MeasurementFields

MeasurementFields returns the measurement fields for a measurement.

func (*Engine) Open 

func (e *Engine) Open() error

Open opens and initializes the engine.

func (*Engine) Path 

func (e *Engine) Path() string

Path returns the path the engine was opened with.

func (*Engine) Restore 

func (e *Engine) Restore(r io.Reader, basePath string) error

Restore will read a tar archive generated by Backup(). Only files that match basePath will be copied into the directory. This obtains a write lock so no operations can be performed while restoring.

func (*Engine) SeriesCount 

func (e *Engine) SeriesCount() (n int, err error)

SeriesCount returns the number of series buckets on the shard.

func (*Engine) SetCompactionsEnabled 

func (e *Engine) SetCompactionsEnabled(enabled bool)

SetCompactionsEnabled enables compactions on the engine. When disabled all running compactions are aborted and new compactions stop running.

func (*Engine) SetEnabled 

func (e *Engine) SetEnabled(enabled bool)

func (*Engine) SetLogOutput 

func (e *Engine) SetLogOutput(w io.Writer)

SetLogOutput sets the logger used for all messages. It must not be called after the Open method has been called.

func (*Engine) ShouldCompactCache 

func (e *Engine) ShouldCompactCache(lastWriteTime time.Time) bool

ShouldCompactCache returns true if the Cache is over its flush threshold or if the passed in lastWriteTime is older than the write cold threshold

func (*Engine) WritePoints 

func (e *Engine) WritePoints(points []models.Point) error

WritePoints writes metadata and point data into the engine. Returns an error if new points are added to an existing key.

func (*Engine) WriteSnapshot 

func (e *Engine) WriteSnapshot() error

WriteSnapshot will snapshot the cache and write a new TSM file with its contents, releasing the snapshot when done.

func (*Engine) WriteTo 

func (e *Engine) WriteTo(w io.Writer) (n int64, err error)

type FileStat 

type FileStat struct {
	Path             string
	HasTombstone     bool
	Size             uint32
	LastModified     int64
	MinTime, MaxTime int64
	MinKey, MaxKey   string
}

func (FileStat) ContainsKey 

func (f FileStat) ContainsKey(key string) bool

func (FileStat) OverlapsKeyRange 

func (f FileStat) OverlapsKeyRange(min, max string) bool

func (FileStat) OverlapsTimeRange 

func (f FileStat) OverlapsTimeRange(min, max int64) bool

type FileStore 

type FileStore struct {
	Logger *log.Logger
	// contains filtered or unexported fields
}

func NewFileStore 

func NewFileStore(dir string) *FileStore

func (*FileStore) Add 

func (f *FileStore) Add(files ...TSMFile)

func (*FileStore) BlockCount 

func (f *FileStore) BlockCount(path string, idx int) int

BlockCount returns number of values stored in the block at location idx in the file at path. If path does not match any file in the store, 0 is returned. If idx is out of range for the number of blocks in the file, 0 is returned.

func (*FileStore) Close 

func (f *FileStore) Close() error

func (*FileStore) Count 

func (f *FileStore) Count() int

Returns the number of TSM files currently loaded

func (*FileStore) CreateSnapshot 

func (f *FileStore) CreateSnapshot() (string, error)

CreateSnapshot will create hardlinks for all tsm and tombstone files in the path provided

func (*FileStore) CurrentGeneration 

func (f *FileStore) CurrentGeneration() int

CurrentGeneration returns the current generation of the TSM files

func (*FileStore) Delete 

func (f *FileStore) Delete(keys []string) error

func (*FileStore) DeleteRange 

func (f *FileStore) DeleteRange(keys []string, min, max int64) error

DeleteRange removes the values for keys between min and max.

func (*FileStore) Files 

func (f *FileStore) Files() []TSMFile

Files returns TSM files currently loaded.

func (*FileStore) KeyCursor 

func (f *FileStore) KeyCursor(key string, t int64, ascending bool) *KeyCursor

func (*FileStore) Keys 

func (f *FileStore) Keys() map[string]byte

Keys returns all keys and types for all files

func (*FileStore) LastModified 

func (f *FileStore) LastModified() time.Time

LastModified returns the last time the file store was updated with new TSM files or a delete

func (*FileStore) NextGeneration 

func (f *FileStore) NextGeneration() int

NextGeneration returns the max file ID + 1

func (*FileStore) Open 

func (f *FileStore) Open() error

func (*FileStore) Read 

func (f *FileStore) Read(key string, t int64) ([]Value, error)

func (*FileStore) Remove 

func (f *FileStore) Remove(paths ...string)

Remove removes the files with matching paths from the set of active files. It does not remove the paths from disk.

func (*FileStore) Replace 

func (f *FileStore) Replace(oldFiles, newFiles []string) error

func (*FileStore) SetLogOutput 

func (f *FileStore) SetLogOutput(w io.Writer)

SetLogOutput sets the logger used for all messages. It must not be called after the Open method has been called.

func (*FileStore) Stats 

func (f *FileStore) Stats() []FileStat

func (*FileStore) Type 

func (f *FileStore) Type(key string) (byte, error)

func (*FileStore) WalkKeys 

func (f *FileStore) WalkKeys(fn func(key string, typ byte) error) error

WalkKeys calls fn for every key in every TSM file known to the FileStore. If the key exists in multiple files, it will be invoked for each file.

type FloatDecoder 

type FloatDecoder struct {
	// contains filtered or unexported fields
}

FloatDecoder decodes a byte slice into multipe float64 values

func (*FloatDecoder) Error 

func (it *FloatDecoder) Error() error

func (*FloatDecoder) Next 

func (it *FloatDecoder) Next() bool

func (*FloatDecoder) SetBytes 

func (it *FloatDecoder) SetBytes(b []byte) error

SetBytes initializes the decoder with b. Must call before calling Next().

func (*FloatDecoder) Values 

func (it *FloatDecoder) Values() float64

type FloatEncoder 

type FloatEncoder struct {
	// contains filtered or unexported fields
}

FloatEncoder encodes multiple float64s into a byte slice

func NewFloatEncoder 

func NewFloatEncoder() *FloatEncoder

func (*FloatEncoder) Bytes 

func (s *FloatEncoder) Bytes() ([]byte, error)

func (*FloatEncoder) Finish 

func (s *FloatEncoder) Finish()

func (*FloatEncoder) Push 

func (s *FloatEncoder) Push(v float64)

type FloatValue 

type FloatValue struct {
	// contains filtered or unexported fields
}

func DecodeFloatBlock 

func DecodeFloatBlock(block []byte, tdec *TimeDecoder, vdec *FloatDecoder, a *[]FloatValue) ([]FloatValue, error)

func (*FloatValue) Size 

func (f *FloatValue) Size() int

func (*FloatValue) String 

func (f *FloatValue) String() string

func (*FloatValue) UnixNano 

func (f *FloatValue) UnixNano() int64

func (*FloatValue) Value 

func (f *FloatValue) Value() interface{}

type FloatValues 

type FloatValues []FloatValue

FloatValues represents a slice of Float values.

func (FloatValues) Deduplicate 

func (a FloatValues) Deduplicate() FloatValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (FloatValues) Exclude 

func (a FloatValues) Exclude(min, max int64) FloatValues

Exclude returns the subset of values not in [min, max]

func (FloatValues) Include 

func (a FloatValues) Include(min, max int64) FloatValues

Include returns the subset values between min and max inclusive.

func (FloatValues) Len 

func (a FloatValues) Len() int

Sort methods

func (FloatValues) Less 

func (a FloatValues) Less(i, j int) bool

func (FloatValues) MaxTime 

func (a FloatValues) MaxTime() int64

func (FloatValues) Merge 

func (a FloatValues) Merge(b FloatValues) FloatValues

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (FloatValues) MinTime 

func (a FloatValues) MinTime() int64

func (FloatValues) Size 

func (a FloatValues) Size() int

func (FloatValues) Swap 

func (a FloatValues) Swap(i, j int)

type IndexEntry 

type IndexEntry struct {

	// The min and max time of all points stored in the block.
	MinTime, MaxTime int64

	// The absolute position in the file where this block is located.
	Offset int64

	// The size in bytes of the block in the file.
	Size uint32
}

IndexEntry is the index information for a given block in a TSM file.

func (*IndexEntry) AppendTo 

func (e *IndexEntry) AppendTo(b []byte) []byte

AppendTo will write a binary-encoded version of IndexEntry to b, allocating and returning a new slice, if necessary

func (*IndexEntry) Contains 

func (e *IndexEntry) Contains(t int64) bool

Returns true if this IndexEntry may contain values for the given time. The min and max times are inclusive.

func (*IndexEntry) OverlapsTimeRange 

func (e *IndexEntry) OverlapsTimeRange(min, max int64) bool

func (*IndexEntry) String 

func (e *IndexEntry) String() string

func (*IndexEntry) UnmarshalBinary 

func (e *IndexEntry) UnmarshalBinary(b []byte) error

UnmarshalBinary decodes an IndexEntry from a byte slice

type IndexWriter 

type IndexWriter interface {
	// Add records a new block entry for a key in the index.
	Add(key string, blockType byte, minTime, maxTime int64, offset int64, size uint32)

	// Entries returns all index entries for a key.
	Entries(key string) []IndexEntry

	// Keys returns the unique set of keys in the index.
	Keys() []string

	// KeyCount returns the count of unique keys in the index.
	KeyCount() int

	// Size returns the size of a the current index in bytes
	Size() uint32

	// MarshalBinary returns a byte slice encoded version of the index.
	MarshalBinary() ([]byte, error)

	// WriteTo writes the index contents to a writer
	WriteTo(w io.Writer) (int64, error)
}

IndexWriter writes a TSMIndex

func NewIndexWriter 

func NewIndexWriter() IndexWriter

type IntegerDecoder 

type IntegerDecoder struct {
	// contains filtered or unexported fields
}

IntegerDecoder decodes a byte slice into int64s.

func (*IntegerDecoder) Error 

func (d *IntegerDecoder) Error() error

func (*IntegerDecoder) Next 

func (d *IntegerDecoder) Next() bool

func (*IntegerDecoder) Read 

func (d *IntegerDecoder) Read() int64

func (*IntegerDecoder) SetBytes 

func (d *IntegerDecoder) SetBytes(b []byte)

type IntegerEncoder 

type IntegerEncoder struct {
	// contains filtered or unexported fields
}

IntegerEncoder encoders int64 into byte slices

func NewIntegerEncoder 

func NewIntegerEncoder() IntegerEncoder

func (*IntegerEncoder) Bytes 

func (e *IntegerEncoder) Bytes() ([]byte, error)

func (*IntegerEncoder) Write 

func (e *IntegerEncoder) Write(v int64)

type IntegerValue 

type IntegerValue struct {
	// contains filtered or unexported fields
}

func DecodeIntegerBlock 

func DecodeIntegerBlock(block []byte, tdec *TimeDecoder, vdec *IntegerDecoder, a *[]IntegerValue) ([]IntegerValue, error)

func (*IntegerValue) Size 

func (v *IntegerValue) Size() int

func (*IntegerValue) String 

func (f *IntegerValue) String() string

func (*IntegerValue) UnixNano 

func (v *IntegerValue) UnixNano() int64

func (*IntegerValue) Value 

func (v *IntegerValue) Value() interface{}

type IntegerValues 

type IntegerValues []IntegerValue

IntegerValues represents a slice of Integer values.

func (IntegerValues) Deduplicate 

func (a IntegerValues) Deduplicate() IntegerValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (IntegerValues) Exclude 

func (a IntegerValues) Exclude(min, max int64) IntegerValues

Exclude returns the subset of values not in [min, max]

func (IntegerValues) Include 

func (a IntegerValues) Include(min, max int64) IntegerValues

Include returns the subset values between min and max inclusive.

func (IntegerValues) Len 

func (a IntegerValues) Len() int

Sort methods

func (IntegerValues) Less 

func (a IntegerValues) Less(i, j int) bool

func (IntegerValues) MaxTime 

func (a IntegerValues) MaxTime() int64

func (IntegerValues) Merge 

func (a IntegerValues) Merge(b IntegerValues) IntegerValues

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (IntegerValues) MinTime 

func (a IntegerValues) MinTime() int64

func (IntegerValues) Size 

func (a IntegerValues) Size() int

func (IntegerValues) Swap 

func (a IntegerValues) Swap(i, j int)

type KeyCursor 

type KeyCursor struct {
	// contains filtered or unexported fields
}

func (*KeyCursor) Close 

func (c *KeyCursor) Close()

Close removes all references on the cursor.

func (*KeyCursor) Next 

func (c *KeyCursor) Next()

Next moves the cursor to the next position. Data should be read by the ReadBlock functions.

func (*KeyCursor) ReadBooleanBlock 

func (c *KeyCursor) ReadBooleanBlock(tdec *TimeDecoder, vdec *BooleanDecoder, buf *[]BooleanValue) ([]BooleanValue, error)

ReadBooleanBlock reads the next block as a set of boolean values.

func (*KeyCursor) ReadFloatBlock 

func (c *KeyCursor) ReadFloatBlock(tdec *TimeDecoder, vdec *FloatDecoder, buf *[]FloatValue) ([]FloatValue, error)

ReadFloatBlock reads the next block as a set of float values.

func (*KeyCursor) ReadIntegerBlock 

func (c *KeyCursor) ReadIntegerBlock(tdec *TimeDecoder, vdec *IntegerDecoder, buf *[]IntegerValue) ([]IntegerValue, error)

ReadIntegerBlock reads the next block as a set of integer values.

func (*KeyCursor) ReadStringBlock 

func (c *KeyCursor) ReadStringBlock(tdec *TimeDecoder, vdec *StringDecoder, buf *[]StringValue) ([]StringValue, error)

ReadStringBlock reads the next block as a set of string values.

type KeyIterator 

type KeyIterator interface {
	Next() bool
	Read() (string, int64, int64, []byte, error)
	Close() error
}

KeyIterator allows iteration over set of keys and values in sorted order.

func NewCacheKeyIterator 

func NewCacheKeyIterator(cache *Cache, size int) KeyIterator

func NewTSMKeyIterator 

func NewTSMKeyIterator(size int, fast bool, readers ...*TSMReader) (KeyIterator, error)

type SegmentInfo 

type SegmentInfo struct {
	// contains filtered or unexported fields
}

SegmentInfo represents metadata about a segment.

type StringDecoder 

type StringDecoder struct {
	// contains filtered or unexported fields
}

func (*StringDecoder) Error 

func (e *StringDecoder) Error() error

func (*StringDecoder) Next 

func (e *StringDecoder) Next() bool

func (*StringDecoder) Read 

func (e *StringDecoder) Read() string

func (*StringDecoder) SetBytes 

func (e *StringDecoder) SetBytes(b []byte) error

SetBytes initializes the decoder with bytes to read from. This must be called before calling any other method.

type StringEncoder 

type StringEncoder struct {
	// contains filtered or unexported fields
}

func NewStringEncoder 

func NewStringEncoder() StringEncoder

func (*StringEncoder) Bytes 

func (e *StringEncoder) Bytes() ([]byte, error)

func (*StringEncoder) Write 

func (e *StringEncoder) Write(s string)

type StringValue 

type StringValue struct {
	// contains filtered or unexported fields
}

func DecodeStringBlock 

func DecodeStringBlock(block []byte, tdec *TimeDecoder, vdec *StringDecoder, a *[]StringValue) ([]StringValue, error)

func (*StringValue) Size 

func (v *StringValue) Size() int

func (*StringValue) String 

func (f *StringValue) String() string

func (*StringValue) UnixNano 

func (v *StringValue) UnixNano() int64

func (*StringValue) Value 

func (v *StringValue) Value() interface{}

type StringValues 

type StringValues []StringValue

StringValues represents a slice of String values.

func (StringValues) Deduplicate 

func (a StringValues) Deduplicate() StringValues

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (StringValues) Exclude 

func (a StringValues) Exclude(min, max int64) StringValues

Exclude returns the subset of values not in [min, max]

func (StringValues) Include 

func (a StringValues) Include(min, max int64) StringValues

Include returns the subset values between min and max inclusive.

func (StringValues) Len 

func (a StringValues) Len() int

Sort methods

func (StringValues) Less 

func (a StringValues) Less(i, j int) bool

func (StringValues) MaxTime 

func (a StringValues) MaxTime() int64

func (StringValues) Merge 

func (a StringValues) Merge(b StringValues) StringValues

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (StringValues) MinTime 

func (a StringValues) MinTime() int64

func (StringValues) Size 

func (a StringValues) Size() int

func (StringValues) Swap 

func (a StringValues) Swap(i, j int)

type TSMFile 

type TSMFile interface {
	// Path returns the underlying file path for the TSMFile.  If the file
	// has not be written or loaded from disk, the zero value is returned.
	Path() string

	// Read returns all the values in the block where time t resides
	Read(key string, t int64) ([]Value, error)

	// ReadAt returns all the values in the block identified by entry.
	ReadAt(entry *IndexEntry, values []Value) ([]Value, error)
	ReadFloatBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *FloatDecoder, values *[]FloatValue) ([]FloatValue, error)
	ReadIntegerBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *IntegerDecoder, values *[]IntegerValue) ([]IntegerValue, error)
	ReadStringBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *StringDecoder, values *[]StringValue) ([]StringValue, error)
	ReadBooleanBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *BooleanDecoder, values *[]BooleanValue) ([]BooleanValue, error)

	// Entries returns the index entries for all blocks for the given key.
	Entries(key string) []IndexEntry
	ReadEntries(key string, entries *[]IndexEntry)

	// Returns true if the TSMFile may contain a value with the specified
	// key and time
	ContainsValue(key string, t int64) bool

	// Contains returns true if the file contains any values for the given
	// key.
	Contains(key string) bool

	// TimeRange returns the min and max time across all keys in the file.
	TimeRange() (int64, int64)

	// TombstoneRange returns ranges of time that are deleted for the given key.
	TombstoneRange(key string) []TimeRange

	// KeyRange returns the min and max keys in the file.
	KeyRange() (string, string)

	// KeyCount returns the number of distict keys in the file.
	KeyCount() int

	// KeyAt returns the key located at index position idx
	KeyAt(idx int) (string, byte)

	// Type returns the block type of the values stored for the key.  Returns one of
	// BlockFloat64, BlockInt64, BlockBoolean, BlockString.  If key does not exist,
	// an error is returned.
	Type(key string) (byte, error)

	// Delete removes the keys from the set of keys available in this file.
	Delete(keys []string) error

	// DeleteRange removes the values for keys between min and max.
	DeleteRange(keys []string, min, max int64) error

	// HasTombstones returns true if file contains values that have been deleted.
	HasTombstones() bool

	// TombstoneFiles returns the tombstone filestats if there are any tombstones
	// written for this file.
	TombstoneFiles() []FileStat

	// Close the underlying file resources
	Close() error

	// Size returns the size of the file on disk in bytes.
	Size() uint32

	// Remove deletes the file from the filesystem
	Remove() error

	// Stats returns summary information about the TSM file.
	Stats() FileStat

	// BlockIterator returns an iterator pointing to the first block in the file and
	// allows sequential iteration to each every block.
	BlockIterator() *BlockIterator
}

type TSMIndex 

type TSMIndex interface {

	// Delete removes the given keys from the index.
	Delete(keys []string)

	// DeleteRange removes the given keys with data between minTime and maxTime from the index.
	DeleteRange(keys []string, minTime, maxTime int64)

	// Contains return true if the given key exists in the index.
	Contains(key string) bool

	// ContainsValue returns true if key and time might exists in this file.  This function could
	// return true even though the actual point does not exists.  For example, the key may
	// exists in this file, but not have point exactly at time t.
	ContainsValue(key string, timestamp int64) bool

	// Entries returns all index entries for a key.
	Entries(key string) []IndexEntry

	// ReadEntries reads the index entries for key into entries.
	ReadEntries(key string, entries *[]IndexEntry)

	// Entry returns the index entry for the specified key and timestamp.  If no entry
	// matches the key and timestamp, nil is returned.
	Entry(key string, timestamp int64) *IndexEntry

	// Key returns the key in the index at the given postion.
	Key(index int) (string, []IndexEntry)

	// KeyAt returns the key in the index at the given postion.
	KeyAt(index int) (string, byte)

	// KeyCount returns the count of unique keys in the index.
	KeyCount() int

	// Size returns the size of a the current index in bytes
	Size() uint32

	// TimeRange returns the min and max time across all keys in the file.
	TimeRange() (int64, int64)

	// TombstoneRange returns ranges of time that are deleted for the given key.
	TombstoneRange(key string) []TimeRange

	// KeyRange returns the min and max keys in the file.
	KeyRange() (string, string)

	// Type returns the block type of the values stored for the key.  Returns one of
	// BlockFloat64, BlockInt64, BlockBool, BlockString.  If key does not exist,
	// an error is returned.
	Type(key string) (byte, error)

	// UnmarshalBinary populates an index from an encoded byte slice
	// representation of an index.
	UnmarshalBinary(b []byte) error
}

TSMIndex represent the index section of a TSM file. The index records all blocks, their locations, sizes, min and max times.

type TSMReader 

type TSMReader struct {
	// contains filtered or unexported fields
}

func NewTSMReader 

func NewTSMReader(f *os.File) (*TSMReader, error)

func (*TSMReader) BlockIterator 

func (t *TSMReader) BlockIterator() *BlockIterator

func (*TSMReader) Close 

func (t *TSMReader) Close() error

func (*TSMReader) Contains 

func (t *TSMReader) Contains(key string) bool

func (*TSMReader) ContainsValue 

func (t *TSMReader) ContainsValue(key string, ts int64) bool

ContainsValue returns true if key and time might exists in this file. This function could return true even though the actual point does not exists. For example, the key may exists in this file, but not have point exactly at time t.

func (*TSMReader) Delete 

func (t *TSMReader) Delete(keys []string) error

func (*TSMReader) DeleteRange 

func (t *TSMReader) DeleteRange(keys []string, minTime, maxTime int64) error

DeleteRange removes the given points for keys between minTime and maxTime

func (*TSMReader) Entries 

func (t *TSMReader) Entries(key string) []IndexEntry

func (*TSMReader) HasTombstones 

func (t *TSMReader) HasTombstones() bool

HasTombstones return true if there are any tombstone entries recorded.

func (*TSMReader) IndexSize 

func (t *TSMReader) IndexSize() uint32

func (*TSMReader) Key 

func (t *TSMReader) Key(index int) (string, []IndexEntry)

func (*TSMReader) KeyAt 

func (t *TSMReader) KeyAt(idx int) (string, byte)

KeyAt returns the key and key type at position idx in the index.

func (*TSMReader) KeyCount 

func (t *TSMReader) KeyCount() int

func (*TSMReader) KeyRange 

func (t *TSMReader) KeyRange() (string, string)

KeyRange returns the min and max key across all keys in the file.

func (*TSMReader) LastModified 

func (t *TSMReader) LastModified() int64

func (*TSMReader) Path 

func (t *TSMReader) Path() string

func (*TSMReader) Read 

func (t *TSMReader) Read(key string, timestamp int64) ([]Value, error)

func (*TSMReader) ReadAll 

func (t *TSMReader) ReadAll(key string) ([]Value, error)

ReadAll returns all values for a key in all blocks.

func (*TSMReader) ReadAt 

func (t *TSMReader) ReadAt(entry *IndexEntry, vals []Value) ([]Value, error)

func (*TSMReader) ReadBooleanBlockAt 

func (t *TSMReader) ReadBooleanBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *BooleanDecoder, vals *[]BooleanValue) ([]BooleanValue, error)

func (*TSMReader) ReadEntries 

func (t *TSMReader) ReadEntries(key string, entries *[]IndexEntry)

func (*TSMReader) ReadFloatBlockAt 

func (t *TSMReader) ReadFloatBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *FloatDecoder, vals *[]FloatValue) ([]FloatValue, error)

func (*TSMReader) ReadIntegerBlockAt 

func (t *TSMReader) ReadIntegerBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *IntegerDecoder, vals *[]IntegerValue) ([]IntegerValue, error)

func (*TSMReader) ReadStringBlockAt 

func (t *TSMReader) ReadStringBlockAt(entry *IndexEntry, tdec *TimeDecoder, vdec *StringDecoder, vals *[]StringValue) ([]StringValue, error)

func (*TSMReader) Remove 

func (t *TSMReader) Remove() error

Remove removes any underlying files stored on disk for this reader.

func (*TSMReader) Size 

func (t *TSMReader) Size() uint32

func (*TSMReader) Stats 

func (t *TSMReader) Stats() FileStat

func (*TSMReader) TimeRange 

func (t *TSMReader) TimeRange() (int64, int64)

TimeRange returns the min and max time across all keys in the file.

func (*TSMReader) TombstoneFiles 

func (t *TSMReader) TombstoneFiles() []FileStat

TombstoneFiles returns any tombstone files associated with this TSM file.

func (*TSMReader) TombstoneRange 

func (t *TSMReader) TombstoneRange(key string) []TimeRange

TombstoneRange returns ranges of time that are deleted for the given key.

func (*TSMReader) Type 

func (t *TSMReader) Type(key string) (byte, error)

type TSMWriter 

type TSMWriter interface {
	// Write writes a new block for key containing and values.  Writes append
	// blocks in the order that the Write function is called.  The caller is
	// responsible for ensuring keys and blocks or sorted appropriately.
	// Values are encoded as a full block.  The caller is responsible for
	// ensuring a fixed number of values are encoded in each block as wells as
	// ensuring the Values are sorted. The first and last timestamp values are
	// used as the minimum and maximum values for the index entry.
	Write(key string, values Values) error

	// WriteBlock writes a new block for key containing the bytes in block.  WriteBlock appends
	// blocks in the order that the WriteBlock function is called.  The caller is
	// responsible for ensuring keys and blocks are sorted appropriately, and that the
	// block and index information is correct for the block.  The minTime and maxTime
	// timestamp values are used as the minimum and maximum values for the index entry.
	WriteBlock(key string, minTime, maxTime int64, block []byte) error

	// WriteIndex finishes the TSM write streams and writes the index.
	WriteIndex() error

	// Closes any underlying file resources.
	Close() error

	// Size returns the current size in bytes of the file
	Size() uint32
}

TSMWriter writes TSM formatted key and values.

func NewTSMWriter 

func NewTSMWriter(w io.Writer) (TSMWriter, error)

type TimeDecoder 

type TimeDecoder struct {
	// contains filtered or unexported fields
}

func (*TimeDecoder) Error 

func (d *TimeDecoder) Error() error

func (*TimeDecoder) Init 

func (d *TimeDecoder) Init(b []byte)

func (*TimeDecoder) Next 

func (d *TimeDecoder) Next() bool

func (*TimeDecoder) Read 

func (d *TimeDecoder) Read() int64

type TimeEncoder 

type TimeEncoder interface {
	Write(t int64)
	Bytes() ([]byte, error)
}

TimeEncoder encodes time.Time to byte slices.

func NewTimeEncoder 

func NewTimeEncoder() TimeEncoder

NewTimeEncoder returns a TimeEncoder

type TimeRange 

type TimeRange struct {
	Min, Max int64
}

type Tombstone 

type Tombstone struct {
	// Key is the tombstoned series key
	Key string

	// Min and Max are the min and max unix nanosecond time ranges of Key that are deleted.  If
	// the full range is deleted, both values are -1
	Min, Max int64
}

type Tombstoner 

type Tombstoner struct {

	// Path is the location of the file to record tombstone. This should be the
	// full path to a TSM file.
	Path string
	// contains filtered or unexported fields
}

func (*Tombstoner) Add 

func (t *Tombstoner) Add(keys []string) error

Add add the all keys to the tombstone

func (*Tombstoner) AddRange 

func (t *Tombstoner) AddRange(keys []string, min, max int64) error

AddRange adds all keys to the tombstone specifying only the data between min and max to be removed.

func (*Tombstoner) Delete 

func (t *Tombstoner) Delete() error

func (*Tombstoner) HasTombstones 

func (t *Tombstoner) HasTombstones() bool

HasTombstones return true if there are any tombstone entries recorded.

func (*Tombstoner) ReadAll 

func (t *Tombstoner) ReadAll() ([]Tombstone, error)

func (*Tombstoner) TombstoneFiles 

func (t *Tombstoner) TombstoneFiles() []FileStat

TombstoneFiles returns any tombstone files associated with this TSM file.

type Value 

type Value interface {
	UnixNano() int64
	Value() interface{}
	Size() int
	String() string
	// contains filtered or unexported methods
}

func DecodeBlock 

func DecodeBlock(block []byte, vals []Value) ([]Value, error)

DecodeBlock takes a byte array and will decode into values of the appropriate type based on the block.

func NewValue 

func NewValue(t int64, value interface{}) Value

type Values 

type Values []Value

Values represents a slice of values.

func (Values) Deduplicate 

func (a Values) Deduplicate() Values

Deduplicate returns a new slice with any values that have the same timestamp removed. The Value that appears last in the slice is the one that is kept.

func (Values) Encode 

func (a Values) Encode(buf []byte) ([]byte, error)

Encode converts the values to a byte slice. If there are no values, this function panics.

func (Values) Exclude 

func (a Values) Exclude(min, max int64) Values

Exclude returns the subset of values not in [min, max]

func (Values) Include 

func (a Values) Include(min, max int64) Values

Include returns the subset values between min and max inclusive.

func (Values) InfluxQLType 

func (a Values) InfluxQLType() (influxql.DataType, error)

InfluxQLType returns the influxql.DataType the values map to.

func (Values) Len 

func (a Values) Len() int

Sort methods

func (Values) Less 

func (a Values) Less(i, j int) bool

func (Values) MaxTime 

func (a Values) MaxTime() int64

func (Values) Merge 

func (a Values) Merge(b Values) Values

Merge overlays b to top of a. If two values conflict with the same timestamp, b is used. Both a and b must be sorted in ascending order.

func (Values) MinTime 

func (a Values) MinTime() int64

func (Values) Size 

func (a Values) Size() int

func (Values) Swap 

func (a Values) Swap(i, j int)

type WAL 

type WAL struct {

	// WALOutput is the writer used by the logger.
	LogOutput io.Writer

	// SegmentSize is the file size at which a segment file will be rotated
	SegmentSize int

	// LoggingEnabled specifies if detailed logs should be output
	LoggingEnabled bool
	// contains filtered or unexported fields
}

func NewWAL 

func NewWAL(path string) *WAL

func (*WAL) Close 

func (l *WAL) Close() error

Close will finish any flush that is currently in process and close file handles

func (*WAL) CloseSegment 

func (l *WAL) CloseSegment() error

CloseSegment closes the current segment if it is non-empty and opens a new one.

func (*WAL) ClosedSegments 

func (l *WAL) ClosedSegments() ([]string, error)

func (*WAL) Delete 

func (l *WAL) Delete(keys []string) (int, error)

Delete deletes the given keys, returning the segment ID for the operation.

func (*WAL) DeleteRange 

func (l *WAL) DeleteRange(keys []string, min, max int64) (int, error)

Delete deletes the given keys, returning the segment ID for the operation.

func (*WAL) LastWriteTime 

func (l *WAL) LastWriteTime() time.Time

LastWriteTime is the last time anything was written to the WAL

func (*WAL) Open 

func (l *WAL) Open() error

Open opens and initializes the Log. Will recover from previous unclosed shutdowns

func (*WAL) Path 

func (l *WAL) Path() string

Path returns the path the log was initialized with.

func (*WAL) Remove 

func (l *WAL) Remove(files []string) error

func (*WAL) SetLogOutput 

func (l *WAL) SetLogOutput(w io.Writer)

SetLogOutput sets the location that logs are written to. It must not be called after the Open method has been called.

func (*WAL) WritePoints 

func (l *WAL) WritePoints(values map[string][]Value) (int, error)

WritePoints writes the given points to the WAL. Returns the WAL segment ID to which the points were written. If an error is returned the segment ID should be ignored.

type WALEntry 

type WALEntry interface {
	Type() WalEntryType
	Encode(dst []byte) ([]byte, error)
	MarshalBinary() ([]byte, error)
	UnmarshalBinary(b []byte) error
}

WALEntry is record stored in each WAL segment. Each entry has a type and an opaque, type dependent byte slice data attribute.

type WALSegmentReader 

type WALSegmentReader struct {
	// contains filtered or unexported fields
}

WALSegmentReader reads WAL segments.

func NewWALSegmentReader 

func NewWALSegmentReader(r io.ReadCloser) *WALSegmentReader

func (*WALSegmentReader) Close 

func (r *WALSegmentReader) Close() error

func (*WALSegmentReader) Count 

func (r *WALSegmentReader) Count() int64

Count returns the total number of bytes read successfully from the segment, as of the last call to Read(). The segment is guaranteed to be valid up to and including this number of bytes.

func (*WALSegmentReader) Error 

func (r *WALSegmentReader) Error() error

func (*WALSegmentReader) Next 

func (r *WALSegmentReader) Next() bool

Next indicates if there is a value to read

func (*WALSegmentReader) Read 

func (r *WALSegmentReader) Read() (WALEntry, error)

type WALSegmentWriter 

type WALSegmentWriter struct {
	// contains filtered or unexported fields
}

WALSegmentWriter writes WAL segments.

func NewWALSegmentWriter 

func NewWALSegmentWriter(w io.WriteCloser) *WALSegmentWriter

func (*WALSegmentWriter) Write 

func (w *WALSegmentWriter) Write(entryType WalEntryType, compressed []byte) error

type WalEntryType 

type WalEntryType byte

WalEntryType is a byte written to a wal segment file that indicates what the following compressed block contains 

const (
	WriteWALEntryType       WalEntryType = 0x01
	DeleteWALEntryType      WalEntryType = 0x02
	DeleteRangeWALEntryType WalEntryType = 0x03
)

type WriteWALEntry 

type WriteWALEntry struct {
	Values map[string][]Value
}

WriteWALEntry represents a write of points.

func (*WriteWALEntry) Encode 

func (w *WriteWALEntry) Encode(dst []byte) ([]byte, error)

Encode converts the WriteWALEntry into a byte stream using dst if it is large enough. If dst is too small, the slice will be grown to fit the encoded entry.

func (*WriteWALEntry) MarshalBinary 

func (w *WriteWALEntry) MarshalBinary() ([]byte, error)

func (*WriteWALEntry) Type 

func (w *WriteWALEntry) Type() WalEntryType

func (*WriteWALEntry) UnmarshalBinary 

func (w *WriteWALEntry) UnmarshalBinary(b []byte) error

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