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tsm.go
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tsm.go
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package main
import (
"encoding/binary"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"text/tabwriter"
"time"
"github.com/golang/snappy"
"github.com/influxdb/influxdb/tsdb"
"github.com/influxdb/influxdb/tsdb/engine/tsm1"
)
// these consts are for the old tsm format. They can be removed once we remove
// the inspection for the original tsm1 files.
const (
//IDsFileExtension is the extension for the file that keeps the compressed map
// of keys to uint64 IDs.
IDsFileExtension = "ids"
// FieldsFileExtension is the extension for the file that stores compressed field
// encoding data for this db
FieldsFileExtension = "fields"
// SeriesFileExtension is the extension for the file that stores the compressed
// series metadata for series in this db
SeriesFileExtension = "series"
)
type tsdmDumpOpts struct {
dumpIndex bool
dumpBlocks bool
filterKey string
path string
}
type tsmIndex struct {
series int
offset int64
minTime time.Time
maxTime time.Time
blocks []*block
}
type block struct {
id uint64
offset int64
}
type blockStats struct {
min, max int
counts [][]int
}
func (b *blockStats) inc(typ int, enc byte) {
for len(b.counts) <= typ {
b.counts = append(b.counts, []int{})
}
for len(b.counts[typ]) <= int(enc) {
b.counts[typ] = append(b.counts[typ], 0)
}
b.counts[typ][enc]++
}
func (b *blockStats) size(sz int) {
if b.min == 0 || sz < b.min {
b.min = sz
}
if b.min == 0 || sz > b.max {
b.max = sz
}
}
var (
fieldType = []string{
"timestamp", "float", "int", "bool", "string",
}
blockTypes = []string{
"float64", "int64", "bool", "string",
}
timeEnc = []string{
"none", "s8b", "rle",
}
floatEnc = []string{
"none", "gor",
}
intEnc = []string{
"none", "s8b", "rle",
}
boolEnc = []string{
"none", "bp",
}
stringEnc = []string{
"none", "snpy",
}
encDescs = [][]string{
timeEnc, floatEnc, intEnc, boolEnc, stringEnc,
}
)
func readFields(path string) (map[string]*tsdb.MeasurementFields, error) {
fields := make(map[string]*tsdb.MeasurementFields)
f, err := os.OpenFile(filepath.Join(path, FieldsFileExtension), os.O_RDONLY, 0666)
if os.IsNotExist(err) {
return fields, nil
} else if err != nil {
return nil, err
}
b, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
data, err := snappy.Decode(nil, b)
if err != nil {
return nil, err
}
if err := json.Unmarshal(data, &fields); err != nil {
return nil, err
}
return fields, nil
}
func readSeries(path string) (map[string]*tsdb.Series, error) {
series := make(map[string]*tsdb.Series)
f, err := os.OpenFile(filepath.Join(path, SeriesFileExtension), os.O_RDONLY, 0666)
if os.IsNotExist(err) {
return series, nil
} else if err != nil {
return nil, err
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
data, err := snappy.Decode(nil, b)
if err != nil {
return nil, err
}
if err := json.Unmarshal(data, &series); err != nil {
return nil, err
}
return series, nil
}
func readIds(path string) (map[string]uint64, error) {
f, err := os.OpenFile(filepath.Join(path, IDsFileExtension), os.O_RDONLY, 0666)
if os.IsNotExist(err) {
return nil, nil
} else if err != nil {
return nil, err
}
b, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
b, err = snappy.Decode(nil, b)
if err != nil {
return nil, err
}
ids := make(map[string]uint64)
if b != nil {
if err := json.Unmarshal(b, &ids); err != nil {
return nil, err
}
}
return ids, err
}
func readIndex(f *os.File) (*tsmIndex, error) {
// Get the file size
stat, err := f.Stat()
if err != nil {
return nil, err
}
// Seek to the series count
f.Seek(-4, os.SEEK_END)
b := make([]byte, 8)
_, err = f.Read(b[:4])
if err != nil {
return nil, err
}
seriesCount := binary.BigEndian.Uint32(b)
// Get the min time
f.Seek(-20, os.SEEK_END)
f.Read(b)
minTime := time.Unix(0, int64(btou64(b)))
// Get max time
f.Seek(-12, os.SEEK_END)
f.Read(b)
maxTime := time.Unix(0, int64(btou64(b)))
// Figure out where the index starts
indexStart := stat.Size() - int64(seriesCount*12+20)
// Seek to the start of the index
f.Seek(indexStart, os.SEEK_SET)
count := int(seriesCount)
index := &tsmIndex{
offset: indexStart,
minTime: minTime,
maxTime: maxTime,
series: count,
}
if indexStart < 0 {
return nil, fmt.Errorf("index corrupt: offset=%d", indexStart)
}
// Read the index entries
for i := 0; i < count; i++ {
f.Read(b)
id := binary.BigEndian.Uint64(b)
f.Read(b[:4])
pos := binary.BigEndian.Uint32(b[:4])
index.blocks = append(index.blocks, &block{id: id, offset: int64(pos)})
}
return index, nil
}
func cmdDumpTsm1(opts *tsdmDumpOpts) {
var errors []error
f, err := os.Open(opts.path)
if err != nil {
println(err.Error())
os.Exit(1)
}
// Get the file size
stat, err := f.Stat()
if err != nil {
println(err.Error())
os.Exit(1)
}
b := make([]byte, 8)
f.Read(b[:4])
// Verify magic number
if binary.BigEndian.Uint32(b[:4]) != 0x16D116D1 {
println("Not a tsm1 file.")
os.Exit(1)
}
ids, err := readIds(filepath.Dir(opts.path))
if err != nil {
println("Failed to read series:", err.Error())
os.Exit(1)
}
invIds := map[uint64]string{}
for k, v := range ids {
invIds[v] = k
}
index, err := readIndex(f)
if err != nil {
println("Failed to readIndex:", err.Error())
// Create a stubbed out index so we can still try and read the block data directly
// w/o panicing ourselves.
index = &tsmIndex{
minTime: time.Unix(0, 0),
maxTime: time.Unix(0, 0),
offset: stat.Size(),
}
}
blockStats := &blockStats{}
println("Summary:")
fmt.Printf(" File: %s\n", opts.path)
fmt.Printf(" Time Range: %s - %s\n",
index.minTime.UTC().Format(time.RFC3339Nano),
index.maxTime.UTC().Format(time.RFC3339Nano),
)
fmt.Printf(" Duration: %s ", index.maxTime.Sub(index.minTime))
fmt.Printf(" Series: %d ", index.series)
fmt.Printf(" File Size: %d\n", stat.Size())
println()
tw := tabwriter.NewWriter(os.Stdout, 8, 8, 1, '\t', 0)
fmt.Fprintln(tw, " "+strings.Join([]string{"Pos", "ID", "Ofs", "Key", "Field"}, "\t"))
for i, block := range index.blocks {
key := invIds[block.id]
split := strings.Split(key, "#!~#")
// We dont' know know if we have fields so use an informative default
var measurement, field string = "UNKNOWN", "UNKNOWN"
// We read some IDs from the ids file
if len(invIds) > 0 {
// Change the default to error until we know we have a valid key
measurement = "ERR"
field = "ERR"
// Possible corruption? Try to read as much as we can and point to the problem.
if key == "" {
errors = append(errors, fmt.Errorf("index pos %d, field id: %d, missing key for id", i, block.id))
} else if len(split) < 2 {
errors = append(errors, fmt.Errorf("index pos %d, field id: %d, key corrupt: got '%v'", i, block.id, key))
} else {
measurement = split[0]
field = split[1]
}
}
if opts.filterKey != "" && !strings.Contains(key, opts.filterKey) {
continue
}
fmt.Fprintln(tw, " "+strings.Join([]string{
strconv.FormatInt(int64(i), 10),
strconv.FormatUint(block.id, 10),
strconv.FormatInt(int64(block.offset), 10),
measurement,
field,
}, "\t"))
}
if opts.dumpIndex {
println("Index:")
tw.Flush()
println()
}
tw = tabwriter.NewWriter(os.Stdout, 8, 8, 1, '\t', 0)
fmt.Fprintln(tw, " "+strings.Join([]string{"Blk", "Ofs", "Len", "ID", "Type", "Min Time", "Points", "Enc [T/V]", "Len [T/V]"}, "\t"))
// Staring at 4 because the magic number is 4 bytes
i := int64(4)
var blockCount, pointCount, blockSize int64
indexSize := stat.Size() - index.offset
// Start at the beginning and read every block
for i < index.offset {
f.Seek(int64(i), 0)
f.Read(b)
id := btou64(b)
f.Read(b[:4])
length := binary.BigEndian.Uint32(b[:4])
buf := make([]byte, length)
f.Read(buf)
blockSize += int64(len(buf)) + 12
startTime := time.Unix(0, int64(btou64(buf[:8])))
blockType := buf[8]
encoded := buf[9:]
cnt := tsm1.BlockCount(buf)
pointCount += int64(cnt)
// Length of the timestamp block
tsLen, j := binary.Uvarint(encoded)
// Unpack the timestamp bytes
ts := encoded[int(j) : int(j)+int(tsLen)]
// Unpack the value bytes
values := encoded[int(j)+int(tsLen):]
tsEncoding := timeEnc[int(ts[0]>>4)]
vEncoding := encDescs[int(blockType+1)][values[0]>>4]
typeDesc := blockTypes[blockType]
blockStats.inc(0, ts[0]>>4)
blockStats.inc(int(blockType+1), values[0]>>4)
blockStats.size(len(buf))
if opts.filterKey != "" && !strings.Contains(invIds[id], opts.filterKey) {
i += (12 + int64(length))
blockCount++
continue
}
fmt.Fprintln(tw, " "+strings.Join([]string{
strconv.FormatInt(blockCount, 10),
strconv.FormatInt(i, 10),
strconv.FormatInt(int64(len(buf)), 10),
strconv.FormatUint(id, 10),
typeDesc,
startTime.UTC().Format(time.RFC3339Nano),
strconv.FormatInt(int64(cnt), 10),
fmt.Sprintf("%s/%s", tsEncoding, vEncoding),
fmt.Sprintf("%d/%d", len(ts), len(values)),
}, "\t"))
i += (12 + int64(length))
blockCount++
}
if opts.dumpBlocks {
println("Blocks:")
tw.Flush()
println()
}
fmt.Printf("Statistics\n")
fmt.Printf(" Blocks:\n")
fmt.Printf(" Total: %d Size: %d Min: %d Max: %d Avg: %d\n",
blockCount, blockSize, blockStats.min, blockStats.max, blockSize/blockCount)
fmt.Printf(" Index:\n")
fmt.Printf(" Total: %d Size: %d\n", len(index.blocks), indexSize)
fmt.Printf(" Points:\n")
fmt.Printf(" Total: %d", pointCount)
println()
println(" Encoding:")
for i, counts := range blockStats.counts {
if len(counts) == 0 {
continue
}
fmt.Printf(" %s: ", strings.Title(fieldType[i]))
for j, v := range counts {
fmt.Printf("\t%s: %d (%d%%) ", encDescs[i][j], v, int(float64(v)/float64(blockCount)*100))
}
println()
}
fmt.Printf(" Compression:\n")
fmt.Printf(" Per block: %0.2f bytes/point\n", float64(blockSize)/float64(pointCount))
fmt.Printf(" Total: %0.2f bytes/point\n", float64(stat.Size())/float64(pointCount))
if len(errors) > 0 {
println()
fmt.Printf("Errors (%d):\n", len(errors))
for _, err := range errors {
fmt.Printf(" * %v\n", err)
}
println()
}
}
func cmdDumpTsm1dev(opts *tsdmDumpOpts) {
var errors []error
f, err := os.Open(opts.path)
if err != nil {
println(err.Error())
os.Exit(1)
}
// Get the file size
stat, err := f.Stat()
if err != nil {
println(err.Error())
os.Exit(1)
}
b := make([]byte, 8)
r, err := tsm1.NewTSMReaderWithOptions(tsm1.TSMReaderOptions{
MMAPFile: f,
})
if err != nil {
println("Error opening TSM files: ", err.Error())
}
defer r.Close()
minTime, maxTime := r.TimeRange()
keys := r.Keys()
blockStats := &blockStats{}
println("Summary:")
fmt.Printf(" File: %s\n", opts.path)
fmt.Printf(" Time Range: %s - %s\n",
minTime.UTC().Format(time.RFC3339Nano),
maxTime.UTC().Format(time.RFC3339Nano),
)
fmt.Printf(" Duration: %s ", maxTime.Sub(minTime))
fmt.Printf(" Series: %d ", len(keys))
fmt.Printf(" File Size: %d\n", stat.Size())
println()
tw := tabwriter.NewWriter(os.Stdout, 8, 8, 1, '\t', 0)
fmt.Fprintln(tw, " "+strings.Join([]string{"Pos", "Min Time", "Max Time", "Ofs", "Size", "Key", "Field"}, "\t"))
var pos int
for _, key := range keys {
for _, e := range r.Entries(key) {
pos++
split := strings.Split(key, "#!~#")
// We dont' know know if we have fields so use an informative default
var measurement, field string = "UNKNOWN", "UNKNOWN"
// Possible corruption? Try to read as much as we can and point to the problem.
measurement = split[0]
field = split[1]
if opts.filterKey != "" && !strings.Contains(key, opts.filterKey) {
continue
}
fmt.Fprintln(tw, " "+strings.Join([]string{
strconv.FormatInt(int64(pos), 10),
e.MinTime.UTC().Format(time.RFC3339Nano),
e.MaxTime.UTC().Format(time.RFC3339Nano),
strconv.FormatInt(int64(e.Offset), 10),
strconv.FormatInt(int64(e.Size), 10),
measurement,
field,
}, "\t"))
}
}
if opts.dumpIndex {
println("Index:")
tw.Flush()
println()
}
tw = tabwriter.NewWriter(os.Stdout, 8, 8, 1, '\t', 0)
fmt.Fprintln(tw, " "+strings.Join([]string{"Blk", "Chk", "Ofs", "Len", "Type", "Min Time", "Points", "Enc [T/V]", "Len [T/V]"}, "\t"))
// Starting at 5 because the magic number is 4 bytes + 1 byte version
i := int64(5)
var blockCount, pointCount, blockSize int64
indexSize := r.IndexSize()
// Start at the beginning and read every block
for _, key := range keys {
for _, e := range r.Entries(key) {
f.Seek(int64(e.Offset), 0)
f.Read(b[:4])
chksum := btou32(b[:4])
buf := make([]byte, e.Size-4)
f.Read(buf)
blockSize += int64(e.Size)
blockType := buf[0]
encoded := buf[1:]
var v []tsm1.Value
v, err := tsm1.DecodeBlock(buf, v)
if err != nil {
fmt.Printf("error: %v\n", err.Error())
os.Exit(1)
}
startTime := v[0].Time()
pointCount += int64(len(v))
// Length of the timestamp block
tsLen, j := binary.Uvarint(encoded)
// Unpack the timestamp bytes
ts := encoded[int(j) : int(j)+int(tsLen)]
// Unpack the value bytes
values := encoded[int(j)+int(tsLen):]
tsEncoding := timeEnc[int(ts[0]>>4)]
vEncoding := encDescs[int(blockType+1)][values[0]>>4]
typeDesc := blockTypes[blockType]
blockStats.inc(0, ts[0]>>4)
blockStats.inc(int(blockType+1), values[0]>>4)
blockStats.size(len(buf))
if opts.filterKey != "" && !strings.Contains(key, opts.filterKey) {
i += blockSize
blockCount++
continue
}
fmt.Fprintln(tw, " "+strings.Join([]string{
strconv.FormatInt(blockCount, 10),
strconv.FormatUint(uint64(chksum), 10),
strconv.FormatInt(i, 10),
strconv.FormatInt(int64(len(buf)), 10),
typeDesc,
startTime.UTC().Format(time.RFC3339Nano),
strconv.FormatInt(int64(len(v)), 10),
fmt.Sprintf("%s/%s", tsEncoding, vEncoding),
fmt.Sprintf("%d/%d", len(ts), len(values)),
}, "\t"))
i += blockSize
blockCount++
}
}
if opts.dumpBlocks {
println("Blocks:")
tw.Flush()
println()
}
var blockSizeAvg int64
if blockCount > 0 {
blockSizeAvg = blockSize / blockCount
}
fmt.Printf("Statistics\n")
fmt.Printf(" Blocks:\n")
fmt.Printf(" Total: %d Size: %d Min: %d Max: %d Avg: %d\n",
blockCount, blockSize, blockStats.min, blockStats.max, blockSizeAvg)
fmt.Printf(" Index:\n")
fmt.Printf(" Total: %d Size: %d\n", blockCount, indexSize)
fmt.Printf(" Points:\n")
fmt.Printf(" Total: %d", pointCount)
println()
println(" Encoding:")
for i, counts := range blockStats.counts {
if len(counts) == 0 {
continue
}
fmt.Printf(" %s: ", strings.Title(fieldType[i]))
for j, v := range counts {
fmt.Printf("\t%s: %d (%d%%) ", encDescs[i][j], v, int(float64(v)/float64(blockCount)*100))
}
println()
}
fmt.Printf(" Compression:\n")
fmt.Printf(" Per block: %0.2f bytes/point\n", float64(blockSize)/float64(pointCount))
fmt.Printf(" Total: %0.2f bytes/point\n", float64(stat.Size())/float64(pointCount))
if len(errors) > 0 {
println()
fmt.Printf("Errors (%d):\n", len(errors))
for _, err := range errors {
fmt.Printf(" * %v\n", err)
}
println()
}
}