updated tsdb to 0.6.0 (#5292)

* updated tsdb to 0.6.0

as part of the update also added the new storage.tsdb.allow-overlapping-blocks flag and mark it as experimental.

cmd/prometheus/main.go

@@ -198,6 +198,9 @@ func main() {
 	a.Flag("storage.tsdb.no-lockfile", "Do not create lockfile in data directory.").
 		Default("false").BoolVar(&cfg.tsdb.NoLockfile)
 
+	a.Flag("storage.tsdb.allow-overlapping-blocks", "[EXPERIMENTAL] Allow overlapping blocks which in-turn enables vertical compaction and vertical query merge.").
+		Default("false").BoolVar(&cfg.tsdb.AllowOverlappingBlocks)
+
 	a.Flag("storage.remote.flush-deadline", "How long to wait flushing sample on shutdown or config reload.").
 		Default("1m").PlaceHolder("<duration>").SetValue(&cfg.RemoteFlushDeadline)
 
@@ -652,6 +655,7 @@ func main() {
 					"NoLockfile", cfg.tsdb.NoLockfile,
 					"RetentionDuration", cfg.tsdb.RetentionDuration,
 					"WALSegmentSize", cfg.tsdb.WALSegmentSize,
+					"AllowOverlappingBlocks", cfg.tsdb.AllowOverlappingBlocks,
 				)
 
 				startTimeMargin := int64(2 * time.Duration(cfg.tsdb.MinBlockDuration).Seconds() * 1000)

go.mod

@@ -90,7 +90,7 @@ require (
 	github.com/prometheus/client_golang v0.9.1
 	github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910
 	github.com/prometheus/common v0.0.0-20181119215939-b36ad289a3ea
-	github.com/prometheus/tsdb v0.4.1-0.20190219143357-77d5a7d47a52
+	github.com/prometheus/tsdb v0.6.0
 	github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a // indirect
 	github.com/rlmcpherson/s3gof3r v0.5.0 // indirect
 	github.com/rubyist/circuitbreaker v2.2.1+incompatible // indirect

go.sum

@@ -231,8 +231,8 @@ github.com/prometheus/common v0.0.0-20181119215939-b36ad289a3ea/go.mod h1:daVV7q
 github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d h1:GoAlyOgbOEIFdaDqxJVlbOQ1DtGmZWs/Qau0hIlk+WQ=
 github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
-github.com/prometheus/tsdb v0.4.1-0.20190219143357-77d5a7d47a52 h1:ULXRH8vXOu1QwA7l7N+zAKS/jfvs7HLCNH77FEdKTTQ=
-github.com/prometheus/tsdb v0.4.1-0.20190219143357-77d5a7d47a52/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
+github.com/prometheus/tsdb v0.6.0 h1:BKo0qP+rz4y79nqwrs6mB080S6qQAlYXEMR3y/luNik=
+github.com/prometheus/tsdb v0.6.0/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a h1:9ZKAASQSHhDYGoxY8uLVpewe1GDZ2vu2Tr/vTdVAkFQ=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
 github.com/rlmcpherson/s3gof3r v0.5.0 h1:1izOJpTiohSibfOHuNyEA/yQnAirh05enzEdmhez43k=

storage/tsdb/tsdb.go

@@ -126,6 +126,10 @@ type Options struct {
 
 	// Disable creation and consideration of lockfile.
 	NoLockfile bool
+
+	// When true it disables the overlapping blocks check.
+	// This in-turn enables vertical compaction and vertical query merge.
+	AllowOverlappingBlocks bool
 }
 
 var (
@@ -190,6 +194,7 @@ func Open(path string, l log.Logger, r prometheus.Registerer, opts *Options) (*t
 		MaxBytes:               int64(opts.MaxBytes),
 		BlockRanges:            rngs,
 		NoLockfile:             opts.NoLockfile,
+		AllowOverlappingBlocks: opts.AllowOverlappingBlocks,
 	})
 	if err != nil {
 		return nil, err

vendor/github.com/prometheus/tsdb/CHANGELOG.md

@@ -1,11 +1,22 @@
 ## master / unreleased
- - [ENHANCEMENT] Time-ovelapping blocks are now allowed. [#370](https://github.com/prometheus/tsdb/pull/370)
+
+## 0.6.0
+  - [CHANGE] `AllowOverlappingBlock` is now `AllowOverlappingBlocks`.
+
+## 0.5.0
+ - [FEATURE] Time-ovelapping blocks are now allowed. [#370](https://github.com/prometheus/tsdb/pull/370)
+   - Disabled by default and can be enabled via `AllowOverlappingBlock` option.
    - Added `MergeChunks` function in `chunkenc/xor.go` to merge 2 time-overlapping chunks.
    - Added `MergeOverlappingChunks` function in `chunks/chunks.go` to merge multiple time-overlapping Chunk Metas.
    - Added `MinTime` and `MaxTime` method for `BlockReader`.
- - [CHANGE]  `NewLeveledCompactor` takes a context so that a compaction is canceled when closing the db.
+ - [FEATURE] New `dump` command to tsdb tool to dump all samples.
+ - [FEATURE] New `encoding` package for common binary encoding/decoding helpers. 
+    - Added to remove some code duplication.
  - [ENHANCEMENT] When closing the db any running compaction will be cancelled so it doesn't block.
- - [CHANGE] `prometheus_tsdb_storage_blocks_bytes_total` is now `prometheus_tsdb_storage_blocks_bytes`
+   - `NewLeveledCompactor` takes a context.
+ - [CHANGE] `prometheus_tsdb_storage_blocks_bytes_total` is now `prometheus_tsdb_storage_blocks_bytes`.
+ - [BUGFIX] Improved Postings Merge performance. Fixes a regression from the the previous release.
+ - [BUGFIX] LiveReader can get into an infinite loop on corrupt WALs.
 
 ## 0.4.0
  - [CHANGE] New `WALSegmentSize` option to override the `DefaultOptions.WALSegmentSize`. Added to allow using smaller wal files. For example using tmpfs on a RPI to minimise the SD card wear out from the constant WAL writes. As part of this change the `DefaultOptions.WALSegmentSize` constant was also exposed.

vendor/github.com/prometheus/tsdb/compact.go

@@ -51,8 +51,8 @@ func ExponentialBlockRanges(minSize int64, steps, stepSize int) []int64 {
 // Compactor provides compaction against an underlying storage
 // of time series data.
 type Compactor interface {
-	// Plan returns a set of non-overlapping directories that can
-	// be compacted concurrently.
+	// Plan returns a set of directories that can be compacted concurrently.
+	// The directories can be overlapping.
 	// Results returned when compactions are in progress are undefined.
 	Plan(dir string) ([]string, error)
 

vendor/github.com/prometheus/tsdb/db.go

@@ -49,6 +49,7 @@ var DefaultOptions = &Options{
 	RetentionDuration:      15 * 24 * 60 * 60 * 1000, // 15 days in milliseconds
 	BlockRanges:            ExponentialBlockRanges(int64(2*time.Hour)/1e6, 3, 5),
 	NoLockfile:             false,
+	AllowOverlappingBlocks: false,
 }
 
 // Options of the DB storage.
@@ -71,6 +72,10 @@ type Options struct {
 
 	// NoLockfile disables creation and consideration of a lock file.
 	NoLockfile bool
+
+	// Overlapping blocks are allowed if AllowOverlappingBlocks is true.
+	// This in-turn enables vertical compaction and vertical query merge.
+	AllowOverlappingBlocks bool
 }
 
 // Appender allows appending a batch of data. It must be completed with a
@@ -548,6 +553,11 @@ func (db *DB) reload() (err error) {
 	sort.Slice(loadable, func(i, j int) bool {
 		return loadable[i].Meta().MinTime < loadable[j].Meta().MinTime
 	})
+	if !db.opts.AllowOverlappingBlocks {
+		if err := validateBlockSequence(loadable); err != nil {
+			return errors.Wrap(err, "invalid block sequence")
+		}
+	}
 
 	// Swap new blocks first for subsequently created readers to be seen.
 	db.mtx.Lock()
@@ -699,6 +709,25 @@ func (db *DB) deleteBlocks(blocks map[ulid.ULID]*Block) error {
 	return nil
 }
 
+// validateBlockSequence returns error if given block meta files indicate that some blocks overlaps within sequence.
+func validateBlockSequence(bs []*Block) error {
+	if len(bs) <= 1 {
+		return nil
+	}
+
+	var metas []BlockMeta
+	for _, b := range bs {
+		metas = append(metas, b.meta)
+	}
+
+	overlaps := OverlappingBlocks(metas)
+	if len(overlaps) > 0 {
+		return errors.Errorf("block time ranges overlap: %s", overlaps)
+	}
+
+	return nil
+}
+
 // TimeRange specifies minTime and maxTime range.
 type TimeRange struct {
 	Min, Max int64

vendor/github.com/prometheus/tsdb/encoding/encoding.go

@@ -0,0 +1,244 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"encoding/binary"
+	"hash"
+	"hash/crc32"
+	"unsafe"
+
+	"github.com/pkg/errors"
+)
+
+var (
+	ErrInvalidSize     = errors.New("invalid size")
+	ErrInvalidChecksum = errors.New("invalid checksum")
+)
+
+// enbuf is a helper type to populate a byte slice with various types.
+type Encbuf struct {
+	B []byte
+	C [binary.MaxVarintLen64]byte
+}
+
+func (e *Encbuf) Reset()      { e.B = e.B[:0] }
+func (e *Encbuf) Get() []byte { return e.B }
+func (e *Encbuf) Len() int    { return len(e.B) }
+
+func (e *Encbuf) PutString(s string) { e.B = append(e.B, s...) }
+func (e *Encbuf) PutByte(c byte)     { e.B = append(e.B, c) }
+
+func (e *Encbuf) PutBE32int(x int)      { e.PutBE32(uint32(x)) }
+func (e *Encbuf) PutUvarint32(x uint32) { e.PutUvarint64(uint64(x)) }
+func (e *Encbuf) PutBE64int64(x int64)  { e.PutBE64(uint64(x)) }
+func (e *Encbuf) PutUvarint(x int)      { e.PutUvarint64(uint64(x)) }
+
+func (e *Encbuf) PutBE32(x uint32) {
+	binary.BigEndian.PutUint32(e.C[:], x)
+	e.B = append(e.B, e.C[:4]...)
+}
+
+func (e *Encbuf) PutBE64(x uint64) {
+	binary.BigEndian.PutUint64(e.C[:], x)
+	e.B = append(e.B, e.C[:8]...)
+}
+
+func (e *Encbuf) PutUvarint64(x uint64) {
+	n := binary.PutUvarint(e.C[:], x)
+	e.B = append(e.B, e.C[:n]...)
+}
+
+func (e *Encbuf) PutVarint64(x int64) {
+	n := binary.PutVarint(e.C[:], x)
+	e.B = append(e.B, e.C[:n]...)
+}
+
+// putVarintStr writes a string to the buffer prefixed by its varint length (in bytes!).
+func (e *Encbuf) PutUvarintStr(s string) {
+	b := *(*[]byte)(unsafe.Pointer(&s))
+	e.PutUvarint(len(b))
+	e.PutString(s)
+}
+
+// putHash appends a hash over the buffers current contents to the buffer.
+func (e *Encbuf) PutHash(h hash.Hash) {
+	h.Reset()
+	_, err := h.Write(e.B)
+	if err != nil {
+		panic(err) // The CRC32 implementation does not error
+	}
+	e.B = h.Sum(e.B)
+}
+
+// decbuf provides safe methods to extract data from a byte slice. It does all
+// necessary bounds checking and advancing of the byte slice.
+// Several datums can be extracted without checking for errors. However, before using
+// any datum, the err() method must be checked.
+type Decbuf struct {
+	B []byte
+	E error
+}
+
+// NewDecbufAt returns a new decoding buffer. It expects the first 4 bytes
+// after offset to hold the big endian encoded content length, followed by the contents and the expected
+// checksum.
+func NewDecbufAt(bs ByteSlice, off int, castagnoliTable *crc32.Table) Decbuf {
+	if bs.Len() < off+4 {
+		return Decbuf{E: ErrInvalidSize}
+	}
+	b := bs.Range(off, off+4)
+	l := int(binary.BigEndian.Uint32(b))
+
+	if bs.Len() < off+4+l+4 {
+		return Decbuf{E: ErrInvalidSize}
+	}
+
+	// Load bytes holding the contents plus a CRC32 checksum.
+	b = bs.Range(off+4, off+4+l+4)
+	dec := Decbuf{B: b[:len(b)-4]}
+
+	if exp := binary.BigEndian.Uint32(b[len(b)-4:]); dec.Crc32(castagnoliTable) != exp {
+		return Decbuf{E: ErrInvalidChecksum}
+	}
+	return dec
+}
+
+// NewDecbufUvarintAt returns a new decoding buffer. It expects the first bytes
+// after offset to hold the uvarint-encoded buffers length, followed by the contents and the expected
+// checksum.
+func NewDecbufUvarintAt(bs ByteSlice, off int, castagnoliTable *crc32.Table) Decbuf {
+	// We never have to access this method at the far end of the byte slice. Thus just checking
+	// against the MaxVarintLen32 is sufficient.
+	if bs.Len() < off+binary.MaxVarintLen32 {
+		return Decbuf{E: ErrInvalidSize}
+	}
+	b := bs.Range(off, off+binary.MaxVarintLen32)
+
+	l, n := binary.Uvarint(b)
+	if n <= 0 || n > binary.MaxVarintLen32 {
+		return Decbuf{E: errors.Errorf("invalid uvarint %d", n)}
+	}
+
+	if bs.Len() < off+n+int(l)+4 {
+		return Decbuf{E: ErrInvalidSize}
+	}
+
+	// Load bytes holding the contents plus a CRC32 checksum.
+	b = bs.Range(off+n, off+n+int(l)+4)
+	dec := Decbuf{B: b[:len(b)-4]}
+
+	if dec.Crc32(castagnoliTable) != binary.BigEndian.Uint32(b[len(b)-4:]) {
+		return Decbuf{E: ErrInvalidChecksum}
+	}
+	return dec
+}
+
+func (d *Decbuf) Uvarint() int     { return int(d.Uvarint64()) }
+func (d *Decbuf) Be32int() int     { return int(d.Be32()) }
+func (d *Decbuf) Be64int64() int64 { return int64(d.Be64()) }
+
+// Crc32 returns a CRC32 checksum over the remaining bytes.
+func (d *Decbuf) Crc32(castagnoliTable *crc32.Table) uint32 {
+	return crc32.Checksum(d.B, castagnoliTable)
+}
+
+func (d *Decbuf) UvarintStr() string {
+	l := d.Uvarint64()
+	if d.E != nil {
+		return ""
+	}
+	if len(d.B) < int(l) {
+		d.E = ErrInvalidSize
+		return ""
+	}
+	s := string(d.B[:l])
+	d.B = d.B[l:]
+	return s
+}
+
+func (d *Decbuf) Varint64() int64 {
+	if d.E != nil {
+		return 0
+	}
+	x, n := binary.Varint(d.B)
+	if n < 1 {
+		d.E = ErrInvalidSize
+		return 0
+	}
+	d.B = d.B[n:]
+	return x
+}
+
+func (d *Decbuf) Uvarint64() uint64 {
+	if d.E != nil {
+		return 0
+	}
+	x, n := binary.Uvarint(d.B)
+	if n < 1 {
+		d.E = ErrInvalidSize
+		return 0
+	}
+	d.B = d.B[n:]
+	return x
+}
+
+func (d *Decbuf) Be64() uint64 {
+	if d.E != nil {
+		return 0
+	}
+	if len(d.B) < 8 {
+		d.E = ErrInvalidSize
+		return 0
+	}
+	x := binary.BigEndian.Uint64(d.B)
+	d.B = d.B[8:]
+	return x
+}
+
+func (d *Decbuf) Be32() uint32 {
+	if d.E != nil {
+		return 0
+	}
+	if len(d.B) < 4 {
+		d.E = ErrInvalidSize
+		return 0
+	}
+	x := binary.BigEndian.Uint32(d.B)
+	d.B = d.B[4:]
+	return x
+}
+
+func (d *Decbuf) Byte() byte {
+	if d.E != nil {
+		return 0
+	}
+	if len(d.B) < 1 {
+		d.E = ErrInvalidSize
+		return 0
+	}
+	x := d.B[0]
+	d.B = d.B[1:]
+	return x
+}
+
+func (d *Decbuf) Err() error  { return d.E }
+func (d *Decbuf) Len() int    { return len(d.B) }
+func (d *Decbuf) Get() []byte { return d.B }
+
+// ByteSlice abstracts a byte slice.
+type ByteSlice interface {
+	Len() int
+	Range(start, end int) []byte
+}

vendor/github.com/prometheus/tsdb/encoding_helpers.go

@@ -1,160 +0,0 @@
-// Copyright 2018 The Prometheus Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package tsdb
-
-import (
-	"encoding/binary"
-	"unsafe"
-
-	"github.com/pkg/errors"
-)
-
-var errInvalidSize = errors.New("invalid size")
-
-// encbuf is a helper type to populate a byte slice with various types.
-type encbuf struct {
-	b []byte
-	c [binary.MaxVarintLen64]byte
-}
-
-func (e *encbuf) reset()      { e.b = e.b[:0] }
-func (e *encbuf) get() []byte { return e.b }
-
-func (e *encbuf) putString(s string) { e.b = append(e.b, s...) }
-func (e *encbuf) putByte(c byte)     { e.b = append(e.b, c) }
-
-func (e *encbuf) putBE64int64(x int64) { e.putBE64(uint64(x)) }
-func (e *encbuf) putUvarint(x int)     { e.putUvarint64(uint64(x)) }
-
-func (e *encbuf) putBE32(x uint32) {
-	binary.BigEndian.PutUint32(e.c[:], x)
-	e.b = append(e.b, e.c[:4]...)
-}
-
-func (e *encbuf) putBE64(x uint64) {
-	binary.BigEndian.PutUint64(e.c[:], x)
-	e.b = append(e.b, e.c[:8]...)
-}
-
-func (e *encbuf) putUvarint64(x uint64) {
-	n := binary.PutUvarint(e.c[:], x)
-	e.b = append(e.b, e.c[:n]...)
-}
-
-func (e *encbuf) putVarint64(x int64) {
-	n := binary.PutVarint(e.c[:], x)
-	e.b = append(e.b, e.c[:n]...)
-}
-
-// putVarintStr writes a string to the buffer prefixed by its varint length (in bytes!).
-func (e *encbuf) putUvarintStr(s string) {
-	b := *(*[]byte)(unsafe.Pointer(&s))
-	e.putUvarint(len(b))
-	e.putString(s)
-}
-
-// decbuf provides safe methods to extract data from a byte slice. It does all
-// necessary bounds checking and advancing of the byte slice.
-// Several datums can be extracted without checking for errors. However, before using
-// any datum, the err() method must be checked.
-type decbuf struct {
-	b []byte
-	e error
-}
-
-func (d *decbuf) uvarint() int     { return int(d.uvarint64()) }
-func (d *decbuf) be64int64() int64 { return int64(d.be64()) }
-
-func (d *decbuf) uvarintStr() string {
-	l := d.uvarint64()
-	if d.e != nil {
-		return ""
-	}
-	if len(d.b) < int(l) {
-		d.e = errInvalidSize
-		return ""
-	}
-	s := string(d.b[:l])
-	d.b = d.b[l:]
-	return s
-}
-
-func (d *decbuf) varint64() int64 {
-	if d.e != nil {
-		return 0
-	}
-	x, n := binary.Varint(d.b)
-	if n < 1 {
-		d.e = errInvalidSize
-		return 0
-	}
-	d.b = d.b[n:]
-	return x
-}
-
-func (d *decbuf) uvarint64() uint64 {
-	if d.e != nil {
-		return 0
-	}
-	x, n := binary.Uvarint(d.b)
-	if n < 1 {
-		d.e = errInvalidSize
-		return 0
-	}
-	d.b = d.b[n:]
-	return x
-}
-
-func (d *decbuf) be64() uint64 {
-	if d.e != nil {
-		return 0
-	}
-	if len(d.b) < 4 {
-		d.e = errInvalidSize
-		return 0
-	}
-	x := binary.BigEndian.Uint64(d.b)
-	d.b = d.b[8:]
-	return x
-}
-
-func (d *decbuf) be32() uint32 {
-	if d.e != nil {
-		return 0
-	}
-	if len(d.b) < 4 {
-		d.e = errInvalidSize
-		return 0
-	}
-	x := binary.BigEndian.Uint32(d.b)
-	d.b = d.b[4:]
-	return x
-}
-
-func (d *decbuf) byte() byte {
-	if d.e != nil {
-		return 0
-	}
-	if len(d.b) < 1 {
-		d.e = errInvalidSize
-		return 0
-	}
-	x := d.b[0]
-	d.b = d.b[1:]
-	return x
-}
-
-func (d *decbuf) err() error  { return d.e }
-func (d *decbuf) len() int    { return len(d.b) }
-func (d *decbuf) get() []byte { return d.b }

vendor/github.com/prometheus/tsdb/head.go

@@ -28,6 +28,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/tsdb/chunkenc"
 	"github.com/prometheus/tsdb/chunks"
+	"github.com/prometheus/tsdb/encoding"
 	"github.com/prometheus/tsdb/index"
 	"github.com/prometheus/tsdb/labels"
 	"github.com/prometheus/tsdb/wal"
@@ -1117,7 +1118,7 @@ func (h *headIndexReader) Symbols() (map[string]struct{}, error) {
 // LabelValues returns the possible label values
 func (h *headIndexReader) LabelValues(names ...string) (index.StringTuples, error) {
 	if len(names) != 1 {
-		return nil, errInvalidSize
+		return nil, encoding.ErrInvalidSize
 	}
 
 	h.head.symMtx.RLock()

vendor/github.com/prometheus/tsdb/index/encoding_helpers.go

@@ -1,218 +0,0 @@
-// Copyright 2018 The Prometheus Authors
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package index
-
-import (
-	"encoding/binary"
-	"hash"
-	"hash/crc32"
-	"unsafe"
-
-	"github.com/pkg/errors"
-)
-
-// enbuf is a helper type to populate a byte slice with various types.
-type encbuf struct {
-	b []byte
-	c [binary.MaxVarintLen64]byte
-}
-
-func (e *encbuf) reset()      { e.b = e.b[:0] }
-func (e *encbuf) get() []byte { return e.b }
-func (e *encbuf) len() int    { return len(e.b) }
-
-func (e *encbuf) putString(s string) { e.b = append(e.b, s...) }
-func (e *encbuf) putByte(c byte)     { e.b = append(e.b, c) }
-
-func (e *encbuf) putBE32int(x int)      { e.putBE32(uint32(x)) }
-func (e *encbuf) putUvarint32(x uint32) { e.putUvarint64(uint64(x)) }
-func (e *encbuf) putUvarint(x int)      { e.putUvarint64(uint64(x)) }
-
-func (e *encbuf) putBE32(x uint32) {
-	binary.BigEndian.PutUint32(e.c[:], x)
-	e.b = append(e.b, e.c[:4]...)
-}
-
-func (e *encbuf) putBE64(x uint64) {
-	binary.BigEndian.PutUint64(e.c[:], x)
-	e.b = append(e.b, e.c[:8]...)
-}
-
-func (e *encbuf) putUvarint64(x uint64) {
-	n := binary.PutUvarint(e.c[:], x)
-	e.b = append(e.b, e.c[:n]...)
-}
-
-func (e *encbuf) putVarint64(x int64) {
-	n := binary.PutVarint(e.c[:], x)
-	e.b = append(e.b, e.c[:n]...)
-}
-
-// putVarintStr writes a string to the buffer prefixed by its varint length (in bytes!).
-func (e *encbuf) putUvarintStr(s string) {
-	b := *(*[]byte)(unsafe.Pointer(&s))
-	e.putUvarint(len(b))
-	e.putString(s)
-}
-
-// putHash appends a hash over the buffers current contents to the buffer.
-func (e *encbuf) putHash(h hash.Hash) {
-	h.Reset()
-	_, err := h.Write(e.b)
-	if err != nil {
-		panic(err) // The CRC32 implementation does not error
-	}
-	e.b = h.Sum(e.b)
-}
-
-// decbuf provides safe methods to extract data from a byte slice. It does all
-// necessary bounds checking and advancing of the byte slice.
-// Several datums can be extracted without checking for errors. However, before using
-// any datum, the err() method must be checked.
-type decbuf struct {
-	b []byte
-	e error
-}
-
-// newDecbufAt returns a new decoding buffer. It expects the first 4 bytes
-// after offset to hold the big endian encoded content length, followed by the contents and the expected
-// checksum.
-func newDecbufAt(bs ByteSlice, off int) decbuf {
-	if bs.Len() < off+4 {
-		return decbuf{e: errInvalidSize}
-	}
-	b := bs.Range(off, off+4)
-	l := int(binary.BigEndian.Uint32(b))
-
-	if bs.Len() < off+4+l+4 {
-		return decbuf{e: errInvalidSize}
-	}
-
-	// Load bytes holding the contents plus a CRC32 checksum.
-	b = bs.Range(off+4, off+4+l+4)
-	dec := decbuf{b: b[:len(b)-4]}
-
-	if exp := binary.BigEndian.Uint32(b[len(b)-4:]); dec.crc32() != exp {
-		return decbuf{e: errInvalidChecksum}
-	}
-	return dec
-}
-
-// decbufUvarintAt returns a new decoding buffer. It expects the first bytes
-// after offset to hold the uvarint-encoded buffers length, followed by the contents and the expected
-// checksum.
-func newDecbufUvarintAt(bs ByteSlice, off int) decbuf {
-	// We never have to access this method at the far end of the byte slice. Thus just checking
-	// against the MaxVarintLen32 is sufficient.
-	if bs.Len() < off+binary.MaxVarintLen32 {
-		return decbuf{e: errInvalidSize}
-	}
-	b := bs.Range(off, off+binary.MaxVarintLen32)
-
-	l, n := binary.Uvarint(b)
-	if n <= 0 || n > binary.MaxVarintLen32 {
-		return decbuf{e: errors.Errorf("invalid uvarint %d", n)}
-	}
-
-	if bs.Len() < off+n+int(l)+4 {
-		return decbuf{e: errInvalidSize}
-	}
-
-	// Load bytes holding the contents plus a CRC32 checksum.
-	b = bs.Range(off+n, off+n+int(l)+4)
-	dec := decbuf{b: b[:len(b)-4]}
-
-	if dec.crc32() != binary.BigEndian.Uint32(b[len(b)-4:]) {
-		return decbuf{e: errInvalidChecksum}
-	}
-	return dec
-}
-
-func (d *decbuf) uvarint() int { return int(d.uvarint64()) }
-func (d *decbuf) be32int() int { return int(d.be32()) }
-
-// crc32 returns a CRC32 checksum over the remaining bytes.
-func (d *decbuf) crc32() uint32 {
-	return crc32.Checksum(d.b, castagnoliTable)
-}
-
-func (d *decbuf) uvarintStr() string {
-	l := d.uvarint64()
-	if d.e != nil {
-		return ""
-	}
-	if len(d.b) < int(l) {
-		d.e = errInvalidSize
-		return ""
-	}
-	s := string(d.b[:l])
-	d.b = d.b[l:]
-	return s
-}
-
-func (d *decbuf) varint64() int64 {
-	if d.e != nil {
-		return 0
-	}
-	x, n := binary.Varint(d.b)
-	if n < 1 {
-		d.e = errInvalidSize
-		return 0
-	}
-	d.b = d.b[n:]
-	return x
-}
-
-func (d *decbuf) uvarint64() uint64 {
-	if d.e != nil {
-		return 0
-	}
-	x, n := binary.Uvarint(d.b)
-	if n < 1 {
-		d.e = errInvalidSize
-		return 0
-	}
-	d.b = d.b[n:]
-	return x
-}
-
-func (d *decbuf) be64() uint64 {
-	if d.e != nil {
-		return 0
-	}
-	if len(d.b) < 8 {
-		d.e = errInvalidSize
-		return 0
-	}
-	x := binary.BigEndian.Uint64(d.b)
-	d.b = d.b[8:]
-	return x
-}
-
-func (d *decbuf) be32() uint32 {
-	if d.e != nil {
-		return 0
-	}
-	if len(d.b) < 4 {
-		d.e = errInvalidSize
-		return 0
-	}
-	x := binary.BigEndian.Uint32(d.b)
-	d.b = d.b[4:]
-	return x
-}
-
-func (d *decbuf) err() error  { return d.e }
-func (d *decbuf) len() int    { return len(d.b) }
-func (d *decbuf) get() []byte { return d.b }

vendor/github.com/prometheus/tsdb/index/index.go

@@ -16,7 +16,6 @@ package index
 import (
 	"bufio"
 	"encoding/binary"
-	"fmt"
 	"hash"
 	"hash/crc32"
 	"io"
@@ -29,6 +28,7 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/prometheus/tsdb/chunks"
+	"github.com/prometheus/tsdb/encoding"
 	"github.com/prometheus/tsdb/fileutil"
 	"github.com/prometheus/tsdb/labels"
 )
@@ -119,8 +119,8 @@ type Writer struct {
 	stage indexWriterStage
 
 	// Reusable memory.
-	buf1    encbuf
-	buf2    encbuf
+	buf1    encoding.Encbuf
+	buf2    encoding.Encbuf
 	uint32s []uint32
 
 	symbols       map[string]uint32 // symbol offsets
@@ -149,28 +149,28 @@ type TOC struct {
 // NewTOCFromByteSlice return parsed TOC from given index byte slice.
 func NewTOCFromByteSlice(bs ByteSlice) (*TOC, error) {
 	if bs.Len() < indexTOCLen {
-		return nil, errInvalidSize
+		return nil, encoding.ErrInvalidSize
 	}
 	b := bs.Range(bs.Len()-indexTOCLen, bs.Len())
 
 	expCRC := binary.BigEndian.Uint32(b[len(b)-4:])
-	d := decbuf{b: b[:len(b)-4]}
+	d := encoding.Decbuf{B: b[:len(b)-4]}
 
-	if d.crc32() != expCRC {
-		return nil, errors.Wrap(errInvalidChecksum, "read TOC")
+	if d.Crc32(castagnoliTable) != expCRC {
+		return nil, errors.Wrap(encoding.ErrInvalidChecksum, "read TOC")
 	}
 
-	if err := d.err(); err != nil {
+	if err := d.Err(); err != nil {
 		return nil, err
 	}
 
 	return &TOC{
-		Symbols:           d.be64(),
-		Series:            d.be64(),
-		LabelIndices:      d.be64(),
-		LabelIndicesTable: d.be64(),
-		Postings:          d.be64(),
-		PostingsTable:     d.be64(),
+		Symbols:           d.Be64(),
+		Series:            d.Be64(),
+		LabelIndices:      d.Be64(),
+		LabelIndicesTable: d.Be64(),
+		Postings:          d.Be64(),
+		PostingsTable:     d.Be64(),
 	}, nil
 }
 
@@ -203,8 +203,8 @@ func NewWriter(fn string) (*Writer, error) {
 		stage: idxStageNone,
 
 		// Reusable memory.
-		buf1:    encbuf{b: make([]byte, 0, 1<<22)},
-		buf2:    encbuf{b: make([]byte, 0, 1<<22)},
+		buf1:    encoding.Encbuf{B: make([]byte, 0, 1<<22)},
+		buf2:    encoding.Encbuf{B: make([]byte, 0, 1<<22)},
 		uint32s: make([]uint32, 0, 1<<15),
 
 		// Caches.
@@ -288,11 +288,11 @@ func (w *Writer) ensureStage(s indexWriterStage) error {
 }
 
 func (w *Writer) writeMeta() error {
-	w.buf1.reset()
-	w.buf1.putBE32(MagicIndex)
-	w.buf1.putByte(FormatV2)
+	w.buf1.Reset()
+	w.buf1.PutBE32(MagicIndex)
+	w.buf1.PutByte(FormatV2)
 
-	return w.write(w.buf1.get())
+	return w.write(w.buf1.Get())
 }
 
 // AddSeries adds the series one at a time along with its chunks.
@@ -318,8 +318,8 @@ func (w *Writer) AddSeries(ref uint64, lset labels.Labels, chunks ...chunks.Meta
 	}
 	w.seriesOffsets[ref] = w.pos / 16
 
-	w.buf2.reset()
-	w.buf2.putUvarint(len(lset))
+	w.buf2.Reset()
+	w.buf2.PutUvarint(len(lset))
 
 	for _, l := range lset {
 		// here we have an index for the symbol file if v2, otherwise it's an offset
@@ -327,41 +327,41 @@ func (w *Writer) AddSeries(ref uint64, lset labels.Labels, chunks ...chunks.Meta
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", l.Name)
 		}
-		w.buf2.putUvarint32(index)
+		w.buf2.PutUvarint32(index)
 
 		index, ok = w.symbols[l.Value]
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", l.Value)
 		}
-		w.buf2.putUvarint32(index)
+		w.buf2.PutUvarint32(index)
 	}
 
-	w.buf2.putUvarint(len(chunks))
+	w.buf2.PutUvarint(len(chunks))
 
 	if len(chunks) > 0 {
 		c := chunks[0]
-		w.buf2.putVarint64(c.MinTime)
-		w.buf2.putUvarint64(uint64(c.MaxTime - c.MinTime))
-		w.buf2.putUvarint64(c.Ref)
+		w.buf2.PutVarint64(c.MinTime)
+		w.buf2.PutUvarint64(uint64(c.MaxTime - c.MinTime))
+		w.buf2.PutUvarint64(c.Ref)
 		t0 := c.MaxTime
 		ref0 := int64(c.Ref)
 
 		for _, c := range chunks[1:] {
-			w.buf2.putUvarint64(uint64(c.MinTime - t0))
-			w.buf2.putUvarint64(uint64(c.MaxTime - c.MinTime))
+			w.buf2.PutUvarint64(uint64(c.MinTime - t0))
+			w.buf2.PutUvarint64(uint64(c.MaxTime - c.MinTime))
 			t0 = c.MaxTime
 
-			w.buf2.putVarint64(int64(c.Ref) - ref0)
+			w.buf2.PutVarint64(int64(c.Ref) - ref0)
 			ref0 = int64(c.Ref)
 		}
 	}
 
-	w.buf1.reset()
-	w.buf1.putUvarint(w.buf2.len())
+	w.buf1.Reset()
+	w.buf1.PutUvarint(w.buf2.Len())
 
-	w.buf2.putHash(w.crc32)
+	w.buf2.PutHash(w.crc32)
 
-	if err := w.write(w.buf1.get(), w.buf2.get()); err != nil {
+	if err := w.write(w.buf1.Get(), w.buf2.Get()); err != nil {
 		return errors.Wrap(err, "write series data")
 	}
 
@@ -382,22 +382,22 @@ func (w *Writer) AddSymbols(sym map[string]struct{}) error {
 	}
 	sort.Strings(symbols)
 
-	w.buf1.reset()
-	w.buf2.reset()
+	w.buf1.Reset()
+	w.buf2.Reset()
 
-	w.buf2.putBE32int(len(symbols))
+	w.buf2.PutBE32int(len(symbols))
 
 	w.symbols = make(map[string]uint32, len(symbols))
 
 	for index, s := range symbols {
 		w.symbols[s] = uint32(index)
-		w.buf2.putUvarintStr(s)
+		w.buf2.PutUvarintStr(s)
 	}
 
-	w.buf1.putBE32int(w.buf2.len())
-	w.buf2.putHash(w.crc32)
+	w.buf1.PutBE32int(w.buf2.Len())
+	w.buf2.PutHash(w.crc32)
 
-	err := w.write(w.buf1.get(), w.buf2.get())
+	err := w.write(w.buf1.Get(), w.buf2.Get())
 	return errors.Wrap(err, "write symbols")
 }
 
@@ -425,9 +425,9 @@ func (w *Writer) WriteLabelIndex(names []string, values []string) error {
 		offset: w.pos,
 	})
 
-	w.buf2.reset()
-	w.buf2.putBE32int(len(names))
-	w.buf2.putBE32int(valt.Len())
+	w.buf2.Reset()
+	w.buf2.PutBE32int(len(names))
+	w.buf2.PutBE32int(valt.Len())
 
 	// here we have an index for the symbol file if v2, otherwise it's an offset
 	for _, v := range valt.entries {
@@ -435,53 +435,53 @@ func (w *Writer) WriteLabelIndex(names []string, values []string) error {
 		if !ok {
 			return errors.Errorf("symbol entry for %q does not exist", v)
 		}
-		w.buf2.putBE32(index)
+		w.buf2.PutBE32(index)
 	}
 
-	w.buf1.reset()
-	w.buf1.putBE32int(w.buf2.len())
+	w.buf1.Reset()
+	w.buf1.PutBE32int(w.buf2.Len())
 
-	w.buf2.putHash(w.crc32)
+	w.buf2.PutHash(w.crc32)
 
-	err = w.write(w.buf1.get(), w.buf2.get())
+	err = w.write(w.buf1.Get(), w.buf2.Get())
 	return errors.Wrap(err, "write label index")
 }
 
 // writeOffsetTable writes a sequence of readable hash entries.
 func (w *Writer) writeOffsetTable(entries []hashEntry) error {
-	w.buf2.reset()
-	w.buf2.putBE32int(len(entries))
+	w.buf2.Reset()
+	w.buf2.PutBE32int(len(entries))
 
 	for _, e := range entries {
-		w.buf2.putUvarint(len(e.keys))
+		w.buf2.PutUvarint(len(e.keys))
 		for _, k := range e.keys {
-			w.buf2.putUvarintStr(k)
+			w.buf2.PutUvarintStr(k)
 		}
-		w.buf2.putUvarint64(e.offset)
+		w.buf2.PutUvarint64(e.offset)
 	}
 
-	w.buf1.reset()
-	w.buf1.putBE32int(w.buf2.len())
-	w.buf2.putHash(w.crc32)
+	w.buf1.Reset()
+	w.buf1.PutBE32int(w.buf2.Len())
+	w.buf2.PutHash(w.crc32)
 
-	return w.write(w.buf1.get(), w.buf2.get())
+	return w.write(w.buf1.Get(), w.buf2.Get())
 }
 
 const indexTOCLen = 6*8 + 4
 
 func (w *Writer) writeTOC() error {
-	w.buf1.reset()
+	w.buf1.Reset()
 
-	w.buf1.putBE64(w.toc.Symbols)
-	w.buf1.putBE64(w.toc.Series)
-	w.buf1.putBE64(w.toc.LabelIndices)
-	w.buf1.putBE64(w.toc.LabelIndicesTable)
-	w.buf1.putBE64(w.toc.Postings)
-	w.buf1.putBE64(w.toc.PostingsTable)
+	w.buf1.PutBE64(w.toc.Symbols)
+	w.buf1.PutBE64(w.toc.Series)
+	w.buf1.PutBE64(w.toc.LabelIndices)
+	w.buf1.PutBE64(w.toc.LabelIndicesTable)
+	w.buf1.PutBE64(w.toc.Postings)
+	w.buf1.PutBE64(w.toc.PostingsTable)
 
-	w.buf1.putHash(w.crc32)
+	w.buf1.PutHash(w.crc32)
 
-	return w.write(w.buf1.get())
+	return w.write(w.buf1.Get())
 }
 
 func (w *Writer) WritePostings(name, value string, it Postings) error {
@@ -519,20 +519,20 @@ func (w *Writer) WritePostings(name, value string, it Postings) error {
 	}
 	sort.Sort(uint32slice(refs))
 
-	w.buf2.reset()
-	w.buf2.putBE32int(len(refs))
+	w.buf2.Reset()
+	w.buf2.PutBE32int(len(refs))
 
 	for _, r := range refs {
-		w.buf2.putBE32(r)
+		w.buf2.PutBE32(r)
 	}
 	w.uint32s = refs
 
-	w.buf1.reset()
-	w.buf1.putBE32int(w.buf2.len())
+	w.buf1.Reset()
+	w.buf1.PutBE32int(w.buf2.Len())
 
-	w.buf2.putHash(w.crc32)
+	w.buf2.PutHash(w.crc32)
 
-	err := w.write(w.buf1.get(), w.buf2.get())
+	err := w.write(w.buf1.Get(), w.buf2.Get())
 	return errors.Wrap(err, "write postings")
 }
 
@@ -593,11 +593,6 @@ type Reader struct {
 	version int
 }
 
-var (
-	errInvalidSize     = fmt.Errorf("invalid size")
-	errInvalidChecksum = fmt.Errorf("invalid checksum")
-)
-
 // ByteSlice abstracts a byte slice.
 type ByteSlice interface {
 	Len() int
@@ -643,7 +638,7 @@ func newReader(b ByteSlice, c io.Closer) (*Reader, error) {
 
 	// Verify header.
 	if r.b.Len() < HeaderLen {
-		return nil, errors.Wrap(errInvalidSize, "index header")
+		return nil, errors.Wrap(encoding.ErrInvalidSize, "index header")
 	}
 	if m := binary.BigEndian.Uint32(r.b.Range(0, 4)); m != MagicIndex {
 		return nil, errors.Errorf("invalid magic number %x", m)
@@ -724,13 +719,13 @@ func (r *Reader) PostingsRanges() (map[labels.Label]Range, error) {
 
 	for k, e := range r.postings {
 		for v, start := range e {
-			d := newDecbufAt(r.b, int(start))
-			if d.err() != nil {
-				return nil, d.err()
+			d := encoding.NewDecbufAt(r.b, int(start), castagnoliTable)
+			if d.Err() != nil {
+				return nil, d.Err()
 			}
 			m[labels.Label{Name: k, Value: v}] = Range{
 				Start: int64(start) + 4,
-				End:   int64(start) + 4 + int64(d.len()),
+				End:   int64(start) + 4 + int64(d.Len()),
 			}
 		}
 	}
@@ -744,13 +739,13 @@ func ReadSymbols(bs ByteSlice, version int, off int) ([]string, map[uint32]strin
 	if off == 0 {
 		return nil, nil, nil
 	}
-	d := newDecbufAt(bs, off)
+	d := encoding.NewDecbufAt(bs, off, castagnoliTable)
 
 	var (
-		origLen     = d.len()
-		cnt         = d.be32int()
+		origLen     = d.Len()
+		cnt         = d.Be32int()
 		basePos     = uint32(off) + 4
-		nextPos     = basePos + uint32(origLen-d.len())
+		nextPos     = basePos + uint32(origLen-d.Len())
 		symbolSlice []string
 		symbols     = map[uint32]string{}
 	)
@@ -758,35 +753,35 @@ func ReadSymbols(bs ByteSlice, version int, off int) ([]string, map[uint32]strin
 		symbolSlice = make([]string, 0, cnt)
 	}
 
-	for d.err() == nil && d.len() > 0 && cnt > 0 {
-		s := d.uvarintStr()
+	for d.Err() == nil && d.Len() > 0 && cnt > 0 {
+		s := d.UvarintStr()
 
 		if version == FormatV2 {
 			symbolSlice = append(symbolSlice, s)
 		} else {
 			symbols[nextPos] = s
-			nextPos = basePos + uint32(origLen-d.len())
+			nextPos = basePos + uint32(origLen-d.Len())
 		}
 		cnt--
 	}
-	return symbolSlice, symbols, errors.Wrap(d.err(), "read symbols")
+	return symbolSlice, symbols, errors.Wrap(d.Err(), "read symbols")
 }
 
 // ReadOffsetTable reads an offset table and at the given position calls f for each
 // found entry. If f returns an error it stops decoding and returns the received error.
 func ReadOffsetTable(bs ByteSlice, off uint64, f func([]string, uint64) error) error {
-	d := newDecbufAt(bs, int(off))
-	cnt := d.be32()
+	d := encoding.NewDecbufAt(bs, int(off), castagnoliTable)
+	cnt := d.Be32()
 
-	for d.err() == nil && d.len() > 0 && cnt > 0 {
-		keyCount := d.uvarint()
+	for d.Err() == nil && d.Len() > 0 && cnt > 0 {
+		keyCount := d.Uvarint()
 		keys := make([]string, 0, keyCount)
 
 		for i := 0; i < keyCount; i++ {
-			keys = append(keys, d.uvarintStr())
+			keys = append(keys, d.UvarintStr())
 		}
-		o := d.uvarint64()
-		if d.err() != nil {
+		o := d.Uvarint64()
+		if d.Err() != nil {
 			break
 		}
 		if err := f(keys, o); err != nil {
@@ -794,7 +789,7 @@ func ReadOffsetTable(bs ByteSlice, off uint64, f func([]string, uint64) error) e
 		}
 		cnt--
 	}
-	return d.err()
+	return d.Err()
 }
 
 // Close the reader and its underlying resources.
@@ -843,17 +838,17 @@ func (r *Reader) LabelValues(names ...string) (StringTuples, error) {
 		//return nil, fmt.Errorf("label index doesn't exist")
 	}
 
-	d := newDecbufAt(r.b, int(off))
+	d := encoding.NewDecbufAt(r.b, int(off), castagnoliTable)
 
-	nc := d.be32int()
-	d.be32() // consume unused value entry count.
+	nc := d.Be32int()
+	d.Be32() // consume unused value entry count.
 
-	if d.err() != nil {
-		return nil, errors.Wrap(d.err(), "read label value index")
+	if d.Err() != nil {
+		return nil, errors.Wrap(d.Err(), "read label value index")
 	}
 	st := &serializedStringTuples{
 		idsCount: nc,
-		idsBytes: d.get(),
+		idsBytes: d.Get(),
 		lookup:   r.lookupSymbol,
 	}
 	return st, nil
@@ -882,11 +877,11 @@ func (r *Reader) Series(id uint64, lbls *labels.Labels, chks *[]chunks.Meta) err
 	if r.version == FormatV2 {
 		offset = id * 16
 	}
-	d := newDecbufUvarintAt(r.b, int(offset))
-	if d.err() != nil {
-		return d.err()
+	d := encoding.NewDecbufUvarintAt(r.b, int(offset), castagnoliTable)
+	if d.Err() != nil {
+		return d.Err()
 	}
-	return errors.Wrap(r.dec.Series(d.get(), lbls, chks), "read series")
+	return errors.Wrap(r.dec.Series(d.Get(), lbls, chks), "read series")
 }
 
 // Postings returns a postings list for the given label pair.
@@ -899,11 +894,11 @@ func (r *Reader) Postings(name, value string) (Postings, error) {
 	if !ok {
 		return EmptyPostings(), nil
 	}
-	d := newDecbufAt(r.b, int(off))
-	if d.err() != nil {
-		return nil, errors.Wrap(d.err(), "get postings entry")
+	d := encoding.NewDecbufAt(r.b, int(off), castagnoliTable)
+	if d.Err() != nil {
+		return nil, errors.Wrap(d.Err(), "get postings entry")
 	}
-	_, p, err := r.dec.Postings(d.get())
+	_, p, err := r.dec.Postings(d.Get())
 	if err != nil {
 		return nil, errors.Wrap(err, "decode postings")
 	}
@@ -952,7 +947,7 @@ type stringTuples struct {
 
 func NewStringTuples(entries []string, length int) (*stringTuples, error) {
 	if len(entries)%length != 0 {
-		return nil, errors.Wrap(errInvalidSize, "string tuple list")
+		return nil, errors.Wrap(encoding.ErrInvalidSize, "string tuple list")
 	}
 	return &stringTuples{entries: entries, length: length}, nil
 }
@@ -996,7 +991,7 @@ func (t *serializedStringTuples) Len() int {
 
 func (t *serializedStringTuples) At(i int) ([]string, error) {
 	if len(t.idsBytes) < (i+t.idsCount)*4 {
-		return nil, errInvalidSize
+		return nil, encoding.ErrInvalidSize
 	}
 	res := make([]string, 0, t.idsCount)
 
@@ -1023,10 +1018,10 @@ type Decoder struct {
 
 // Postings returns a postings list for b and its number of elements.
 func (dec *Decoder) Postings(b []byte) (int, Postings, error) {
-	d := decbuf{b: b}
-	n := d.be32int()
-	l := d.get()
-	return n, newBigEndianPostings(l), d.err()
+	d := encoding.Decbuf{B: b}
+	n := d.Be32int()
+	l := d.Get()
+	return n, newBigEndianPostings(l), d.Err()
 }
 
 // Series decodes a series entry from the given byte slice into lset and chks.
@@ -1034,16 +1029,16 @@ func (dec *Decoder) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) e
 	*lbls = (*lbls)[:0]
 	*chks = (*chks)[:0]
 
-	d := decbuf{b: b}
+	d := encoding.Decbuf{B: b}
 
-	k := d.uvarint()
+	k := d.Uvarint()
 
 	for i := 0; i < k; i++ {
-		lno := uint32(d.uvarint())
-		lvo := uint32(d.uvarint())
+		lno := uint32(d.Uvarint())
+		lvo := uint32(d.Uvarint())
 
-		if d.err() != nil {
-			return errors.Wrap(d.err(), "read series label offsets")
+		if d.Err() != nil {
+			return errors.Wrap(d.Err(), "read series label offsets")
 		}
 
 		ln, err := dec.LookupSymbol(lno)
@@ -1059,15 +1054,15 @@ func (dec *Decoder) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) e
 	}
 
 	// Read the chunks meta data.
-	k = d.uvarint()
+	k = d.Uvarint()
 
 	if k == 0 {
 		return nil
 	}
 
-	t0 := d.varint64()
-	maxt := int64(d.uvarint64()) + t0
-	ref0 := int64(d.uvarint64())
+	t0 := d.Varint64()
+	maxt := int64(d.Uvarint64()) + t0
+	ref0 := int64(d.Uvarint64())
 
 	*chks = append(*chks, chunks.Meta{
 		Ref:     uint64(ref0),
@@ -1077,14 +1072,14 @@ func (dec *Decoder) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) e
 	t0 = maxt
 
 	for i := 1; i < k; i++ {
-		mint := int64(d.uvarint64()) + t0
-		maxt := int64(d.uvarint64()) + mint
+		mint := int64(d.Uvarint64()) + t0
+		maxt := int64(d.Uvarint64()) + mint
 
-		ref0 += d.varint64()
+		ref0 += d.Varint64()
 		t0 = maxt
 
-		if d.err() != nil {
-			return errors.Wrapf(d.err(), "read meta for chunk %d", i)
+		if d.Err() != nil {
+			return errors.Wrapf(d.Err(), "read meta for chunk %d", i)
 		}
 
 		*chks = append(*chks, chunks.Meta{
@@ -1093,5 +1088,5 @@ func (dec *Decoder) Series(b []byte, lbls *labels.Labels, chks *[]chunks.Meta) e
 			MaxTime: maxt,
 		})
 	}
-	return d.err()
+	return d.Err()
 }

vendor/github.com/prometheus/tsdb/index/postings.go

@@ -14,6 +14,7 @@
 package index
 
 import (
+	"container/heap"
 	"encoding/binary"
 	"runtime"
 	"sort"
@@ -365,25 +366,132 @@ func Merge(its ...Postings) Postings {
 	if len(its) == 1 {
 		return its[0]
 	}
-	// All the uses of this function immediately expand it, so
-	// collect everything in a map. This is more efficient
-	// when there's 100ks of postings, compared to
-	// having a tree of merge objects.
-	pm := make(map[uint64]struct{}, len(its))
-	for _, it := range its {
-		for it.Next() {
-			pm[it.At()] = struct{}{}
-		}
+	return newMergedPostings(its)
+}
+
+type postingsHeap []Postings
+
+func (h postingsHeap) Len() int           { return len(h) }
+func (h postingsHeap) Less(i, j int) bool { return h[i].At() < h[j].At() }
+func (h *postingsHeap) Swap(i, j int)     { (*h)[i], (*h)[j] = (*h)[j], (*h)[i] }
+
+func (h *postingsHeap) Push(x interface{}) {
+	*h = append(*h, x.(Postings))
+}
+
+func (h *postingsHeap) Pop() interface{} {
+	old := *h
+	n := len(old)
+	x := old[n-1]
+	*h = old[0 : n-1]
+	return x
+}
+
+type mergedPostings struct {
+	h          postingsHeap
+	initilized bool
+	heaped     bool
+	cur        uint64
+	err        error
+}
+
+func newMergedPostings(p []Postings) *mergedPostings {
+	ph := make(postingsHeap, 0, len(p))
+	for _, it := range p {
+		if it.Next() {
+			ph = append(ph, it)
+		} else {
 			if it.Err() != nil {
-			return ErrPostings(it.Err())
+				return &mergedPostings{err: it.Err()}
 			}
 		}
-	pl := make([]uint64, 0, len(pm))
-	for p := range pm {
-		pl = append(pl, p)
 	}
-	sort.Slice(pl, func(i, j int) bool { return pl[i] < pl[j] })
-	return newListPostings(pl)
+	return &mergedPostings{h: ph}
+}
+
+func (it *mergedPostings) Next() bool {
+	if it.h.Len() == 0 || it.err != nil {
+		return false
+	}
+
+	if !it.heaped {
+		heap.Init(&it.h)
+		it.heaped = true
+	}
+	// The user must issue an initial Next.
+	if !it.initilized {
+		it.cur = it.h[0].At()
+		it.initilized = true
+		return true
+	}
+
+	for {
+		cur := it.h[0]
+		if !cur.Next() {
+			heap.Pop(&it.h)
+			if cur.Err() != nil {
+				it.err = cur.Err()
+				return false
+			}
+			if it.h.Len() == 0 {
+				return false
+			}
+		} else {
+			// Value of top of heap has changed, re-heapify.
+			heap.Fix(&it.h, 0)
+		}
+
+		if it.h[0].At() != it.cur {
+			it.cur = it.h[0].At()
+			return true
+		}
+	}
+}
+
+func (it *mergedPostings) Seek(id uint64) bool {
+	if it.h.Len() == 0 || it.err != nil {
+		return false
+	}
+	if !it.initilized {
+		if !it.Next() {
+			return false
+		}
+	}
+	if it.cur >= id {
+		return true
+	}
+	// Heapifying when there is lots of Seeks is inefficient,
+	// mark to be re-heapified on the Next() call.
+	it.heaped = false
+	newH := make(postingsHeap, 0, len(it.h))
+	lowest := ^uint64(0)
+	for _, i := range it.h {
+		if i.Seek(id) {
+			newH = append(newH, i)
+			if i.At() < lowest {
+				lowest = i.At()
+			}
+		} else {
+			if i.Err() != nil {
+				it.err = i.Err()
+				return false
+			}
+		}
+	}
+	it.h = newH
+	if len(it.h) == 0 {
+		return false
+	}
+	it.cur = lowest
+	return true
+}
+
+func (it mergedPostings) At() uint64 {
+	return it.cur
+}
+
+func (it mergedPostings) Err() error {
+	return it.err
 }
 
 // Without returns a new postings list that contains all elements from the full list that
@@ -498,6 +606,9 @@ func (it *listPostings) Seek(x uint64) bool {
 	if it.cur >= x {
 		return true
 	}
+	if len(it.list) == 0 {
+		return false
+	}
 
 	// Do binary search between current position and end.
 	i := sort.Search(len(it.list), func(i int) bool {

vendor/github.com/prometheus/tsdb/querier.go

@@ -354,11 +354,23 @@ func postingsForUnsetLabelMatcher(ix IndexReader, m labels.Matcher) (index.Posti
 		rit = append(rit, it)
 	}
 
+	merged := index.Merge(rit...)
+	// With many many postings, it's best to pre-calculate
+	// the merged list via next rather than have a ton of seeks
+	// in Without/Intersection.
+	if len(rit) > 100 {
+		pl, err := index.ExpandPostings(merged)
+		if err != nil {
+			return nil, err
+		}
+		merged = index.NewListPostings(pl)
+	}
+
 	allPostings, err := ix.Postings(index.AllPostingsKey())
 	if err != nil {
 		return nil, err
 	}
-	return index.Without(allPostings, index.Merge(rit...)), nil
+	return index.Without(allPostings, merged), nil
 }
 
 func mergeStrings(a, b []string) []string {

vendor/github.com/prometheus/tsdb/record.go

@@ -19,6 +19,7 @@ import (
 	"sort"
 
 	"github.com/pkg/errors"
+	"github.com/prometheus/tsdb/encoding"
 	"github.com/prometheus/tsdb/labels"
 )
 
@@ -56,19 +57,19 @@ func (d *RecordDecoder) Type(rec []byte) RecordType {
 
 // Series appends series in rec to the given slice.
 func (d *RecordDecoder) Series(rec []byte, series []RefSeries) ([]RefSeries, error) {
-	dec := decbuf{b: rec}
+	dec := encoding.Decbuf{B: rec}
 
-	if RecordType(dec.byte()) != RecordSeries {
+	if RecordType(dec.Byte()) != RecordSeries {
 		return nil, errors.New("invalid record type")
 	}
-	for len(dec.b) > 0 && dec.err() == nil {
-		ref := dec.be64()
+	for len(dec.B) > 0 && dec.Err() == nil {
+		ref := dec.Be64()
 
-		lset := make(labels.Labels, dec.uvarint())
+		lset := make(labels.Labels, dec.Uvarint())
 
 		for i := range lset {
-			lset[i].Name = dec.uvarintStr()
-			lset[i].Value = dec.uvarintStr()
+			lset[i].Name = dec.UvarintStr()
+			lset[i].Value = dec.UvarintStr()
 		}
 		sort.Sort(lset)
 
@@ -77,33 +78,33 @@ func (d *RecordDecoder) Series(rec []byte, series []RefSeries) ([]RefSeries, err
 			Labels: lset,
 		})
 	}
-	if dec.err() != nil {
-		return nil, dec.err()
+	if dec.Err() != nil {
+		return nil, dec.Err()
 	}
-	if len(dec.b) > 0 {
-		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return series, nil
 }
 
 // Samples appends samples in rec to the given slice.
 func (d *RecordDecoder) Samples(rec []byte, samples []RefSample) ([]RefSample, error) {
-	dec := decbuf{b: rec}
+	dec := encoding.Decbuf{B: rec}
 
-	if RecordType(dec.byte()) != RecordSamples {
+	if RecordType(dec.Byte()) != RecordSamples {
 		return nil, errors.New("invalid record type")
 	}
-	if dec.len() == 0 {
+	if dec.Len() == 0 {
 		return samples, nil
 	}
 	var (
-		baseRef  = dec.be64()
-		baseTime = dec.be64int64()
+		baseRef  = dec.Be64()
+		baseTime = dec.Be64int64()
 	)
-	for len(dec.b) > 0 && dec.err() == nil {
-		dref := dec.varint64()
-		dtime := dec.varint64()
-		val := dec.be64()
+	for len(dec.B) > 0 && dec.Err() == nil {
+		dref := dec.Varint64()
+		dtime := dec.Varint64()
+		val := dec.Be64()
 
 		samples = append(samples, RefSample{
 			Ref: uint64(int64(baseRef) + dref),
@@ -112,35 +113,35 @@ func (d *RecordDecoder) Samples(rec []byte, samples []RefSample) ([]RefSample, e
 		})
 	}
 
-	if dec.err() != nil {
-		return nil, errors.Wrapf(dec.err(), "decode error after %d samples", len(samples))
+	if dec.Err() != nil {
+		return nil, errors.Wrapf(dec.Err(), "decode error after %d samples", len(samples))
 	}
-	if len(dec.b) > 0 {
-		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return samples, nil
 }
 
 // Tombstones appends tombstones in rec to the given slice.
 func (d *RecordDecoder) Tombstones(rec []byte, tstones []Stone) ([]Stone, error) {
-	dec := decbuf{b: rec}
+	dec := encoding.Decbuf{B: rec}
 
-	if RecordType(dec.byte()) != RecordTombstones {
+	if RecordType(dec.Byte()) != RecordTombstones {
 		return nil, errors.New("invalid record type")
 	}
-	for dec.len() > 0 && dec.err() == nil {
+	for dec.Len() > 0 && dec.Err() == nil {
 		tstones = append(tstones, Stone{
-			ref: dec.be64(),
+			ref: dec.Be64(),
 			intervals: Intervals{
-				{Mint: dec.varint64(), Maxt: dec.varint64()},
+				{Mint: dec.Varint64(), Maxt: dec.Varint64()},
 			},
 		})
 	}
-	if dec.err() != nil {
-		return nil, dec.err()
+	if dec.Err() != nil {
+		return nil, dec.Err()
 	}
-	if len(dec.b) > 0 {
-		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return nil, errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return tstones, nil
 }
@@ -152,56 +153,56 @@ type RecordEncoder struct {
 
 // Series appends the encoded series to b and returns the resulting slice.
 func (e *RecordEncoder) Series(series []RefSeries, b []byte) []byte {
-	buf := encbuf{b: b}
-	buf.putByte(byte(RecordSeries))
+	buf := encoding.Encbuf{B: b}
+	buf.PutByte(byte(RecordSeries))
 
 	for _, s := range series {
-		buf.putBE64(s.Ref)
-		buf.putUvarint(len(s.Labels))
+		buf.PutBE64(s.Ref)
+		buf.PutUvarint(len(s.Labels))
 
 		for _, l := range s.Labels {
-			buf.putUvarintStr(l.Name)
-			buf.putUvarintStr(l.Value)
+			buf.PutUvarintStr(l.Name)
+			buf.PutUvarintStr(l.Value)
 		}
 	}
-	return buf.get()
+	return buf.Get()
 }
 
 // Samples appends the encoded samples to b and returns the resulting slice.
 func (e *RecordEncoder) Samples(samples []RefSample, b []byte) []byte {
-	buf := encbuf{b: b}
-	buf.putByte(byte(RecordSamples))
+	buf := encoding.Encbuf{B: b}
+	buf.PutByte(byte(RecordSamples))
 
 	if len(samples) == 0 {
-		return buf.get()
+		return buf.Get()
 	}
 
 	// Store base timestamp and base reference number of first sample.
 	// All samples encode their timestamp and ref as delta to those.
 	first := samples[0]
 
-	buf.putBE64(first.Ref)
-	buf.putBE64int64(first.T)
+	buf.PutBE64(first.Ref)
+	buf.PutBE64int64(first.T)
 
 	for _, s := range samples {
-		buf.putVarint64(int64(s.Ref) - int64(first.Ref))
-		buf.putVarint64(s.T - first.T)
-		buf.putBE64(math.Float64bits(s.V))
+		buf.PutVarint64(int64(s.Ref) - int64(first.Ref))
+		buf.PutVarint64(s.T - first.T)
+		buf.PutBE64(math.Float64bits(s.V))
 	}
-	return buf.get()
+	return buf.Get()
 }
 
 // Tombstones appends the encoded tombstones to b and returns the resulting slice.
 func (e *RecordEncoder) Tombstones(tstones []Stone, b []byte) []byte {
-	buf := encbuf{b: b}
-	buf.putByte(byte(RecordTombstones))
+	buf := encoding.Encbuf{B: b}
+	buf.PutByte(byte(RecordTombstones))
 
 	for _, s := range tstones {
 		for _, iv := range s.intervals {
-			buf.putBE64(s.ref)
-			buf.putVarint64(iv.Mint)
-			buf.putVarint64(iv.Maxt)
+			buf.PutBE64(s.ref)
+			buf.PutVarint64(iv.Mint)
+			buf.PutVarint64(iv.Maxt)
 		}
 	}
-	return buf.get()
+	return buf.Get()
 }

vendor/github.com/prometheus/tsdb/tombstones.go

@@ -23,6 +23,7 @@ import (
 	"sync"
 
 	"github.com/pkg/errors"
+	"github.com/prometheus/tsdb/encoding"
 )
 
 const tombstoneFilename = "tombstones"
@@ -64,12 +65,12 @@ func writeTombstoneFile(dir string, tr TombstoneReader) error {
 		}
 	}()
 
-	buf := encbuf{b: make([]byte, 3*binary.MaxVarintLen64)}
-	buf.reset()
+	buf := encoding.Encbuf{B: make([]byte, 3*binary.MaxVarintLen64)}
+	buf.Reset()
 	// Write the meta.
-	buf.putBE32(MagicTombstone)
-	buf.putByte(tombstoneFormatV1)
-	_, err = f.Write(buf.get())
+	buf.PutBE32(MagicTombstone)
+	buf.PutByte(tombstoneFormatV1)
+	_, err = f.Write(buf.Get())
 	if err != nil {
 		return err
 	}
@@ -78,13 +79,13 @@ func writeTombstoneFile(dir string, tr TombstoneReader) error {
 
 	if err := tr.Iter(func(ref uint64, ivs Intervals) error {
 		for _, iv := range ivs {
-			buf.reset()
+			buf.Reset()
 
-			buf.putUvarint64(ref)
-			buf.putVarint64(iv.Mint)
-			buf.putVarint64(iv.Maxt)
+			buf.PutUvarint64(ref)
+			buf.PutVarint64(iv.Mint)
+			buf.PutVarint64(iv.Maxt)
 
-			_, err = mw.Write(buf.get())
+			_, err = mw.Write(buf.Get())
 			if err != nil {
 				return err
 			}
@@ -126,24 +127,24 @@ func readTombstones(dir string) (TombstoneReader, SizeReader, error) {
 	}
 
 	if len(b) < 5 {
-		return nil, sr, errors.Wrap(errInvalidSize, "tombstones header")
+		return nil, sr, errors.Wrap(encoding.ErrInvalidSize, "tombstones header")
 	}
 
-	d := &decbuf{b: b[:len(b)-4]} // 4 for the checksum.
-	if mg := d.be32(); mg != MagicTombstone {
+	d := &encoding.Decbuf{B: b[:len(b)-4]} // 4 for the checksum.
+	if mg := d.Be32(); mg != MagicTombstone {
 		return nil, sr, fmt.Errorf("invalid magic number %x", mg)
 	}
-	if flag := d.byte(); flag != tombstoneFormatV1 {
+	if flag := d.Byte(); flag != tombstoneFormatV1 {
 		return nil, sr, fmt.Errorf("invalid tombstone format %x", flag)
 	}
 
-	if d.err() != nil {
-		return nil, sr, d.err()
+	if d.Err() != nil {
+		return nil, sr, d.Err()
 	}
 
 	// Verify checksum.
 	hash := newCRC32()
-	if _, err := hash.Write(d.get()); err != nil {
+	if _, err := hash.Write(d.Get()); err != nil {
 		return nil, sr, errors.Wrap(err, "write to hash")
 	}
 	if binary.BigEndian.Uint32(b[len(b)-4:]) != hash.Sum32() {
@@ -152,12 +153,12 @@ func readTombstones(dir string) (TombstoneReader, SizeReader, error) {
 
 	stonesMap := newMemTombstones()
 
-	for d.len() > 0 {
-		k := d.uvarint64()
-		mint := d.varint64()
-		maxt := d.varint64()
-		if d.err() != nil {
-			return nil, sr, d.err()
+	for d.Len() > 0 {
+		k := d.Uvarint64()
+		mint := d.Varint64()
+		maxt := d.Varint64()
+		if d.Err() != nil {
+			return nil, sr, d.Err()
 		}
 
 		stonesMap.addInterval(k, Interval{mint, maxt})

vendor/github.com/prometheus/tsdb/wal.go

@@ -31,6 +31,7 @@ import (
 	"github.com/go-kit/kit/log/level"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/tsdb/encoding"
 	"github.com/prometheus/tsdb/fileutil"
 	"github.com/prometheus/tsdb/labels"
 	"github.com/prometheus/tsdb/wal"
@@ -287,16 +288,16 @@ func (w *SegmentWAL) Reader() WALReader {
 	}
 }
 
-func (w *SegmentWAL) getBuffer() *encbuf {
+func (w *SegmentWAL) getBuffer() *encoding.Encbuf {
 	b := w.buffers.Get()
 	if b == nil {
-		return &encbuf{b: make([]byte, 0, 64*1024)}
+		return &encoding.Encbuf{B: make([]byte, 0, 64*1024)}
 	}
-	return b.(*encbuf)
+	return b.(*encoding.Encbuf)
 }
 
-func (w *SegmentWAL) putBuffer(b *encbuf) {
-	b.reset()
+func (w *SegmentWAL) putBuffer(b *encoding.Encbuf) {
+	b.Reset()
 	w.buffers.Put(b)
 }
 
@@ -366,7 +367,7 @@ func (w *SegmentWAL) Truncate(mint int64, keep func(uint64) bool) error {
 		buf := w.getBuffer()
 		flag = w.encodeSeries(buf, activeSeries)
 
-		_, err = w.writeTo(csf, crc32, WALEntrySeries, flag, buf.get())
+		_, err = w.writeTo(csf, crc32, WALEntrySeries, flag, buf.Get())
 		w.putBuffer(buf)
 
 		if err != nil {
@@ -427,7 +428,7 @@ func (w *SegmentWAL) LogSeries(series []RefSeries) error {
 	w.mtx.Lock()
 	defer w.mtx.Unlock()
 
-	err := w.write(WALEntrySeries, flag, buf.get())
+	err := w.write(WALEntrySeries, flag, buf.Get())
 
 	w.putBuffer(buf)
 
@@ -454,7 +455,7 @@ func (w *SegmentWAL) LogSamples(samples []RefSample) error {
 	w.mtx.Lock()
 	defer w.mtx.Unlock()
 
-	err := w.write(WALEntrySamples, flag, buf.get())
+	err := w.write(WALEntrySamples, flag, buf.Get())
 
 	w.putBuffer(buf)
 
@@ -480,7 +481,7 @@ func (w *SegmentWAL) LogDeletes(stones []Stone) error {
 	w.mtx.Lock()
 	defer w.mtx.Unlock()
 
-	err := w.write(WALEntryDeletes, flag, buf.get())
+	err := w.write(WALEntryDeletes, flag, buf.Get())
 
 	w.putBuffer(buf)
 
@@ -783,20 +784,20 @@ const (
 	walDeletesSimple = 1
 )
 
-func (w *SegmentWAL) encodeSeries(buf *encbuf, series []RefSeries) uint8 {
+func (w *SegmentWAL) encodeSeries(buf *encoding.Encbuf, series []RefSeries) uint8 {
 	for _, s := range series {
-		buf.putBE64(s.Ref)
-		buf.putUvarint(len(s.Labels))
+		buf.PutBE64(s.Ref)
+		buf.PutUvarint(len(s.Labels))
 
 		for _, l := range s.Labels {
-			buf.putUvarintStr(l.Name)
-			buf.putUvarintStr(l.Value)
+			buf.PutUvarintStr(l.Name)
+			buf.PutUvarintStr(l.Value)
 		}
 	}
 	return walSeriesSimple
 }
 
-func (w *SegmentWAL) encodeSamples(buf *encbuf, samples []RefSample) uint8 {
+func (w *SegmentWAL) encodeSamples(buf *encoding.Encbuf, samples []RefSample) uint8 {
 	if len(samples) == 0 {
 		return walSamplesSimple
 	}
@@ -806,23 +807,23 @@ func (w *SegmentWAL) encodeSamples(buf *encbuf, samples []RefSample) uint8 {
 	// TODO(fabxc): optimize for all samples having the same timestamp.
 	first := samples[0]
 
-	buf.putBE64(first.Ref)
-	buf.putBE64int64(first.T)
+	buf.PutBE64(first.Ref)
+	buf.PutBE64int64(first.T)
 
 	for _, s := range samples {
-		buf.putVarint64(int64(s.Ref) - int64(first.Ref))
-		buf.putVarint64(s.T - first.T)
-		buf.putBE64(math.Float64bits(s.V))
+		buf.PutVarint64(int64(s.Ref) - int64(first.Ref))
+		buf.PutVarint64(s.T - first.T)
+		buf.PutBE64(math.Float64bits(s.V))
 	}
 	return walSamplesSimple
 }
 
-func (w *SegmentWAL) encodeDeletes(buf *encbuf, stones []Stone) uint8 {
+func (w *SegmentWAL) encodeDeletes(buf *encoding.Encbuf, stones []Stone) uint8 {
 	for _, s := range stones {
 		for _, iv := range s.intervals {
-			buf.putBE64(s.ref)
-			buf.putVarint64(iv.Mint)
-			buf.putVarint64(iv.Maxt)
+			buf.PutBE64(s.ref)
+			buf.PutVarint64(iv.Mint)
+			buf.PutVarint64(iv.Maxt)
 		}
 	}
 	return walDeletesSimple
@@ -1115,16 +1116,16 @@ func (r *walReader) entry(cr io.Reader) (WALEntryType, byte, []byte, error) {
 }
 
 func (r *walReader) decodeSeries(flag byte, b []byte, res *[]RefSeries) error {
-	dec := decbuf{b: b}
+	dec := encoding.Decbuf{B: b}
 
-	for len(dec.b) > 0 && dec.err() == nil {
-		ref := dec.be64()
+	for len(dec.B) > 0 && dec.Err() == nil {
+		ref := dec.Be64()
 
-		lset := make(labels.Labels, dec.uvarint())
+		lset := make(labels.Labels, dec.Uvarint())
 
 		for i := range lset {
-			lset[i].Name = dec.uvarintStr()
-			lset[i].Value = dec.uvarintStr()
+			lset[i].Name = dec.UvarintStr()
+			lset[i].Value = dec.UvarintStr()
 		}
 		sort.Sort(lset)
 
@@ -1133,11 +1134,11 @@ func (r *walReader) decodeSeries(flag byte, b []byte, res *[]RefSeries) error {
 			Labels: lset,
 		})
 	}
-	if dec.err() != nil {
-		return dec.err()
+	if dec.Err() != nil {
+		return dec.Err()
 	}
-	if len(dec.b) > 0 {
-		return errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return nil
 }
@@ -1146,17 +1147,17 @@ func (r *walReader) decodeSamples(flag byte, b []byte, res *[]RefSample) error {
 	if len(b) == 0 {
 		return nil
 	}
-	dec := decbuf{b: b}
+	dec := encoding.Decbuf{B: b}
 
 	var (
-		baseRef  = dec.be64()
-		baseTime = dec.be64int64()
+		baseRef  = dec.Be64()
+		baseTime = dec.Be64int64()
 	)
 
-	for len(dec.b) > 0 && dec.err() == nil {
-		dref := dec.varint64()
-		dtime := dec.varint64()
-		val := dec.be64()
+	for len(dec.B) > 0 && dec.Err() == nil {
+		dref := dec.Varint64()
+		dtime := dec.Varint64()
+		val := dec.Be64()
 
 		*res = append(*res, RefSample{
 			Ref: uint64(int64(baseRef) + dref),
@@ -1165,31 +1166,31 @@ func (r *walReader) decodeSamples(flag byte, b []byte, res *[]RefSample) error {
 		})
 	}
 
-	if dec.err() != nil {
-		return errors.Wrapf(dec.err(), "decode error after %d samples", len(*res))
+	if dec.Err() != nil {
+		return errors.Wrapf(dec.Err(), "decode error after %d samples", len(*res))
 	}
-	if len(dec.b) > 0 {
-		return errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return nil
 }
 
 func (r *walReader) decodeDeletes(flag byte, b []byte, res *[]Stone) error {
-	dec := &decbuf{b: b}
+	dec := &encoding.Decbuf{B: b}
 
-	for dec.len() > 0 && dec.err() == nil {
+	for dec.Len() > 0 && dec.Err() == nil {
 		*res = append(*res, Stone{
-			ref: dec.be64(),
+			ref: dec.Be64(),
 			intervals: Intervals{
-				{Mint: dec.varint64(), Maxt: dec.varint64()},
+				{Mint: dec.Varint64(), Maxt: dec.Varint64()},
 			},
 		})
 	}
-	if dec.err() != nil {
-		return dec.err()
+	if dec.Err() != nil {
+		return dec.Err()
 	}
-	if len(dec.b) > 0 {
-		return errors.Errorf("unexpected %d bytes left in entry", len(dec.b))
+	if len(dec.B) > 0 {
+		return errors.Errorf("unexpected %d bytes left in entry", len(dec.B))
 	}
 	return nil
 }

vendor/github.com/prometheus/tsdb/wal/wal.go

@@ -228,19 +228,23 @@ func NewSize(logger log.Logger, reg prometheus.Registerer, dir string, segmentSi
 	}
 	// Fresh dir, no segments yet.
 	if j == -1 {
-		if w.segment, err = CreateSegment(w.dir, 0); err != nil {
-			return nil, err
-		}
-	} else {
-		if w.segment, err = OpenWriteSegment(logger, w.dir, j); err != nil {
-			return nil, err
-		}
-		// Correctly initialize donePages.
-		stat, err := w.segment.Stat()
+		segment, err := CreateSegment(w.dir, 0)
 		if err != nil {
 			return nil, err
 		}
-		w.donePages = int(stat.Size() / pageSize)
+
+		if err := w.setSegment(segment); err != nil {
+			return nil, err
+		}
+	} else {
+		segment, err := OpenWriteSegment(logger, w.dir, j)
+		if err != nil {
+			return nil, err
+		}
+
+		if err := w.setSegment(segment); err != nil {
+			return nil, err
+		}
 	}
 	go w.run()
 
@@ -331,7 +335,9 @@ func (w *WAL) Repair(origErr error) error {
 	if err != nil {
 		return err
 	}
-	w.segment = s
+	if err := w.setSegment(s); err != nil {
+		return err
+	}
 
 	f, err := os.Open(tmpfn)
 	if err != nil {
@@ -382,8 +388,9 @@ func (w *WAL) nextSegment() error {
 		return errors.Wrap(err, "create new segment file")
 	}
 	prev := w.segment
-	w.segment = next
-	w.donePages = 0
+	if err := w.setSegment(next); err != nil {
+		return err
+	}
 
 	// Don't block further writes by fsyncing the last segment.
 	w.actorc <- func() {
@@ -397,6 +404,19 @@ func (w *WAL) nextSegment() error {
 	return nil
 }
 
+func (w *WAL) setSegment(segment *Segment) error {
+	w.segment = segment
+
+	// Correctly initialize donePages.
+	stat, err := segment.Stat()
+	if err != nil {
+		return err
+	}
+	w.donePages = int(stat.Size() / pageSize)
+
+	return nil
+}
+
 // flushPage writes the new contents of the page to disk. If no more records will fit into
 // the page, the remaining bytes will be set to zero and a new page will be started.
 // If clear is true, this is enforced regardless of how many bytes are left in the page.

vendor/modules.txt

@@ -242,13 +242,14 @@ github.com/prometheus/procfs
 github.com/prometheus/procfs/nfs
 github.com/prometheus/procfs/xfs
 github.com/prometheus/procfs/internal/util
-# github.com/prometheus/tsdb v0.4.1-0.20190219143357-77d5a7d47a52
+# github.com/prometheus/tsdb v0.6.0
 github.com/prometheus/tsdb
 github.com/prometheus/tsdb/fileutil
 github.com/prometheus/tsdb/wal
 github.com/prometheus/tsdb/labels
 github.com/prometheus/tsdb/chunkenc
 github.com/prometheus/tsdb/chunks
+github.com/prometheus/tsdb/encoding
 github.com/prometheus/tsdb/index
 # github.com/samuel/go-zookeeper v0.0.0-20161028232340-1d7be4effb13
 github.com/samuel/go-zookeeper/zk