tsm1

package
v0.10.0-rc2 Latest Latest
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 Go to latest Published: Feb 2, 2016 License: MIT Imports: 26 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)

	// BlockInt64 designates a block encodes int64 values
	BlockInt64 = byte(1)

	// BlockBool designates a block encodes bool values
	BlockBool = 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 (
	MaxTime = time.Unix(0, math.MaxInt64)
	MinTime = time.Unix(0, 0)
)
View Source 
var (
	ErrNoValues  = fmt.Errorf("no values written")
	ErrTSMClosed = fmt.Errorf("tsm file closed")
)
View Source 
var ErrCacheInvalidCheckpoint = fmt.Errorf("invalid checkpoint")
View Source 
var ErrCacheMemoryExceeded = fmt.Errorf("cache maximum memory size exceeded")
View Source 
var ErrWALClosed = fmt.Errorf("WAL closed")

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 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 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, time.Time, time.Time, []byte, error)

type BoolDecoder 

type BoolDecoder interface {
	Next() bool
	Read() bool
	Error() error
}

BoolDecoder decodes a series of bools from an in-memory buffer.

func NewBoolDecoder 

func NewBoolDecoder(b []byte) BoolDecoder

NewBoolDecoder returns a new instance of BoolDecoder.

type BoolEncoder 

type BoolEncoder interface {
	Write(b bool)
	Bytes() ([]byte, error)
}

BoolEncoder encodes a series of bools to an in-memory buffer.

func NewBoolEncoder 

func NewBoolEncoder() BoolEncoder

NewBoolEncoder returns a new instance of BoolEncoder.

type BoolValue 

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

func DecodeBoolBlock 

func DecodeBoolBlock(block []byte, a []BoolValue) ([]BoolValue, error)

func (*BoolValue) Size 

func (b *BoolValue) Size() int

func (*BoolValue) String 

func (f *BoolValue) String() string

func (*BoolValue) Time 

func (b *BoolValue) Time() time.Time

func (*BoolValue) UnixNano 

func (b *BoolValue) UnixNano() int64

func (*BoolValue) Value 

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

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) *Cache

NewCache returns an instance of a cache which will use a maximum of maxSize bytes of memory.

func (*Cache) ClearSnapshot 

func (c *Cache) ClearSnapshot(snapshot *Cache)

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) Keys 

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

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

func (*Cache) Lock 

func (c *Cache) Lock()

func (*Cache) MaxSize 

func (c *Cache) MaxSize() uint64

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

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

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) Unlock 

func (c *Cache) Unlock()

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.

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
	Cancel chan struct{}
	Size   int

	FileStore interface {
		NextGeneration() int
	}
}

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

func (*Compactor) Clone 

func (c *Compactor) Clone() *Compactor

Clone will return a new compactor that can be used even if the engine is closed

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) 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 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) Time 

func (e *EmptyValue) Time() time.Time

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) Begin 

func (e *Engine) Begin(writable bool) (tsdb.Tx, error)

Begin starts a new transaction on the engine.

func (*Engine) Close 

func (e *Engine) Close() error

Close closes the engine.

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 deletes the series from the engine.

func (*Engine) Format 

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

Format returns the format type of this engine

func (*Engine) KeyCursor 

func (e *Engine) KeyCursor(key string) *KeyCursor

func (*Engine) LoadMetadataIndex 

func (e *Engine) LoadMetadataIndex(_ *tsdb.Shard, index *tsdb.DatabaseIndex, measurementFields map[string]*tsdb.MeasurementFields) error

LoadMetadataIndex loads the shard metadata into memory.

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) PerformMaintenance 

func (e *Engine) PerformMaintenance()

PerformMaintenance is for periodic maintenance of the store. A no-op for b1

func (*Engine) SeriesCount 

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

SeriesCount returns the number of series buckets on the shard.

func (*Engine) SetLogOutput 

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

SetLogOutput is a no-op.

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, measurementFieldsToSave map[string]*tsdb.MeasurementFields, seriesToCreate []*tsdb.SeriesCreate) 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     time.Time
	MinTime, MaxTime time.Time
	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 time.Time) 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) 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) KeyCursor 

func (f *FileStore) KeyCursor(key string) *KeyCursor

func (*FileStore) Keys 

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

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 time.Time) ([]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) Stats 

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

func (*FileStore) Type 

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

type FloatDecoder 

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

FloatDecoder decodes a byte slice into multipe float64 values

func NewFloatDecoder 

func NewFloatDecoder(b []byte) (*FloatDecoder, error)

func (*FloatDecoder) Error 

func (it *FloatDecoder) Error() error

func (*FloatDecoder) Next 

func (it *FloatDecoder) Next() bool

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, a []FloatValue) ([]FloatValue, error)

func (*FloatValue) Size 

func (f *FloatValue) Size() int

func (*FloatValue) String 

func (f *FloatValue) String() string

func (*FloatValue) Time 

func (f *FloatValue) Time() time.Time

func (*FloatValue) UnixNano 

func (f *FloatValue) UnixNano() int64

func (*FloatValue) Value 

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

type IndexEntry 

type IndexEntry struct {

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

	// 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) Contains 

func (e *IndexEntry) Contains(t time.Time) 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 time.Time) bool

func (*IndexEntry) String 

func (e *IndexEntry) String() string

func (*IndexEntry) UnmarshalBinary 

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

type Int64Decoder 

type Int64Decoder interface {
	Next() bool
	Read() int64
	Error() error
}

Int64Decoder decodes a byte slice into int64s

func NewInt64Decoder 

func NewInt64Decoder(b []byte) Int64Decoder

type Int64Encoder 

type Int64Encoder interface {
	Write(v int64)
	Bytes() ([]byte, error)
}

Int64Encoder encoders int64 into byte slices

func NewInt64Encoder 

func NewInt64Encoder() Int64Encoder

type Int64Value 

type Int64Value struct {
	// contains filtered or unexported fields
}

func DecodeInt64Block 

func DecodeInt64Block(block []byte, a []Int64Value) ([]Int64Value, error)

func (*Int64Value) Size 

func (v *Int64Value) Size() int

func (*Int64Value) String 

func (f *Int64Value) String() string

func (*Int64Value) Time 

func (v *Int64Value) Time() time.Time

func (*Int64Value) UnixNano 

func (v *Int64Value) UnixNano() int64

func (*Int64Value) Value 

func (v *Int64Value) Value() interface{}

type KeyCursor 

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

func (*KeyCursor) Close 

func (c *KeyCursor) Close()

func (*KeyCursor) Next 

func (c *KeyCursor) Next(ascending bool) ([]Value, error)

func (*KeyCursor) SeekTo 

func (c *KeyCursor) SeekTo(t time.Time, ascending bool) ([]Value, error)

type KeyIterator 

type KeyIterator interface {
	Next() bool
	Read() (string, time.Time, time.Time, []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 interface {
	Next() bool
	Read() string
	Error() error
}

func NewStringDecoder 

func NewStringDecoder(b []byte) (StringDecoder, error)

type StringEncoder 

type StringEncoder interface {
	Write(s string)
	Bytes() ([]byte, error)
}

func NewStringEncoder 

func NewStringEncoder() StringEncoder

type StringValue 

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

func DecodeStringBlock 

func DecodeStringBlock(block []byte, a []StringValue) ([]StringValue, error)

func (*StringValue) Size 

func (v *StringValue) Size() int

func (*StringValue) String 

func (f *StringValue) String() string

func (*StringValue) Time 

func (v *StringValue) Time() time.Time

func (*StringValue) UnixNano 

func (v *StringValue) UnixNano() int64

func (*StringValue) Value 

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

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 returne.
	Path() string

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

	// Read returns all the values in the block identified by entry.
	ReadAt(entry *IndexEntry, values []Value) ([]Value, error)

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

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

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

	// Keys returns all keys contained in the file.
	Keys() []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)

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

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

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

	// 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 time.Time) bool

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

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

	// 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

	// 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() (time.Time, time.Time)

	// 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)

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

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

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

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

func NewDirectIndex 

func NewDirectIndex() TSMIndex

func NewIndirectIndex 

func NewIndirectIndex() TSMIndex

type TSMReader 

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

func NewTSMReader 

func NewTSMReader(r io.ReadSeeker) (*TSMReader, error)

func NewTSMReaderWithOptions 

func NewTSMReaderWithOptions(opt TSMReaderOptions) (*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 time.Time) 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) 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

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) Keys 

func (t *TSMReader) Keys() []string

func (*TSMReader) LastModified 

func (t *TSMReader) LastModified() time.Time

func (*TSMReader) Path 

func (t *TSMReader) Path() string

func (*TSMReader) Read 

func (t *TSMReader) Read(key string, timestamp time.Time) ([]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) 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() (time.Time, time.Time)

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) Type 

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

type TSMReaderOptions 

type TSMReaderOptions struct {
	// Reader is used to create file IO based reader.
	Reader io.ReadSeeker

	// MMAPFile is used to create an MMAP based reader.
	MMAPFile *os.File
}

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 time.Time, 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 interface {
	Next() bool
	Read() time.Time
	Error() error
}

TimeDecoder decodes byte slices to time.Time values.

func NewTimeDecoder 

func NewTimeDecoder(b []byte) TimeDecoder

type TimeEncoder 

type TimeEncoder interface {
	Write(t time.Time)
	Bytes() ([]byte, error)
}

TimeEncoder encodes time.Time to byte slices.

func NewTimeEncoder 

func NewTimeEncoder() TimeEncoder

NewTimeEncoder returns a TimeEncoder

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

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() ([]string, error)

func (*Tombstoner) TombstoneFiles 

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

TombstoneFiles returns any tombstone files associated with this TSM file.

type Value 

type Value interface {
	Time() time.Time
	UnixNano() int64
	Value() interface{}
	Size() int
	String() string
}

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 time.Time, value interface{}) Value

type Values 

type Values []Value

Values represented a time ascending sorted collection of Value types. the underlying type should be the same across all values, but the interface makes the code cleaner.

func (Values) Deduplicate 

func (a Values) Deduplicate() Values

Deduplicate returns a new Values 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) 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) 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) 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) 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
)

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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