gsh-digital-services/seaweedFS
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more solid weed mount (#4089)

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* compare chunks by timestamp

* fix slab clearing error

* fix test compilation

* move oldest chunk to sealed, instead of by fullness

* lock on fh.entryViewCache

* remove verbose logs

* revert slat clearing

* less logs

* less logs

* track write and read by timestamp

* remove useless logic

* add entry lock on file handle release

* use mem chunk only, swap file chunk has problems

* comment out code that maybe used later

* add debug mode to compare data read and write

* more efficient readResolvedChunks with linked list

* small optimization

* fix test compilation

* minor fix on writer

* add SeparateGarbageChunks

* group chunks into sections

* turn off debug mode

* fix tests

* fix tests

* tmp enable swap file chunk

* Revert "tmp enable swap file chunk"

This reverts commit 985137ec472924e4815f258189f6ca9f2168a0a7.

* simple refactoring

* simple refactoring

* do not re-use swap file chunk. Sealed chunks should not be re-used.

* comment out debugging facilities

* either mem chunk or swap file chunk is fine now

* remove orderedMutex  as *semaphore.Weighted

not found impactful

* optimize size calculation for changing large files

* optimize performance to avoid going through the long list of chunks

* still problems with swap file chunk

* rename

* tiny optimization

* swap file chunk save only successfully read data

* fix

* enable both mem and swap file chunk

* resolve chunks with range

* rename

* fix chunk interval list

* also change file handle chunk group when adding chunks

* pick in-active chunk with time-decayed counter

* fix compilation

* avoid nil with empty fh.entry

* refactoring

* rename

* rename

* refactor visible intervals to *list.List

* refactor chunkViews to *list.List

* add IntervalList for generic interval list

* change visible interval to use IntervalList in generics

* cahnge chunkViews to *IntervalList[*ChunkView]

* use NewFileChunkSection to create

* rename variables

* refactor

* fix renaming leftover

* renaming

* renaming

* add insert interval

* interval list adds lock

* incrementally add chunks to readers

Fixes:
1. set start and stop offset for the value object
2. clone the value object
3. use pointer instead of copy-by-value when passing to interval.Value
4. use insert interval since adding chunk could be out of order

* fix tests compilation

* fix tests compilation
This commit is contained in:
Chris Lu
2023-01-02 23:20:45 -08:00
committed by GitHub
parent 367353b936
commit d4566d4aaa
45 changed files with 1834 additions and 805 deletions
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90
weed/filer/stream.go
View File

@@ -6,7 +6,6 @@ import (
"golang.org/x/exp/slices"
"io"
"math"
"sort"
"strings"
"sync"
"time"
@@ -78,7 +77,8 @@ func StreamContentWithThrottler(masterClient wdclient.HasLookupFileIdFunction, w
fileId2Url := make(map[string][]string)
for _, chunkView := range chunkViews {
for x := chunkViews.Front(); x != nil; x = x.Next {
chunkView := x.Value
var urlStrings []string
var err error
for _, backoff := range getLookupFileIdBackoffSchedule {
@@ -102,29 +102,30 @@ func StreamContentWithThrottler(masterClient wdclient.HasLookupFileIdFunction, w
downloadThrottler := util.NewWriteThrottler(downloadMaxBytesPs)
remaining := size
for _, chunkView := range chunkViews {
if offset < chunkView.LogicOffset {
gap := chunkView.LogicOffset - offset
for x := chunkViews.Front(); x != nil; x = x.Next {
chunkView := x.Value
if offset < chunkView.ViewOffset {
gap := chunkView.ViewOffset - offset
remaining -= gap
glog.V(4).Infof("zero [%d,%d)", offset, chunkView.LogicOffset)
glog.V(4).Infof("zero [%d,%d)", offset, chunkView.ViewOffset)
err := writeZero(writer, gap)
if err != nil {
return fmt.Errorf("write zero [%d,%d)", offset, chunkView.LogicOffset)
return fmt.Errorf("write zero [%d,%d)", offset, chunkView.ViewOffset)
}
offset = chunkView.LogicOffset
offset = chunkView.ViewOffset
}
urlStrings := fileId2Url[chunkView.FileId]
start := time.Now()
err := retriedStreamFetchChunkData(writer, urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size))
offset += int64(chunkView.Size)
remaining -= int64(chunkView.Size)
err := retriedStreamFetchChunkData(writer, urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk, int(chunkView.ViewSize))
offset += int64(chunkView.ViewSize)
remaining -= int64(chunkView.ViewSize)
stats.FilerRequestHistogram.WithLabelValues("chunkDownload").Observe(time.Since(start).Seconds())
if err != nil {
stats.FilerRequestCounter.WithLabelValues("chunkDownloadError").Inc()
return fmt.Errorf("read chunk: %v", err)
}
stats.FilerRequestCounter.WithLabelValues("chunkDownload").Inc()
downloadThrottler.MaybeSlowdown(int64(chunkView.Size))
downloadThrottler.MaybeSlowdown(int64(chunkView.ViewSize))
}
if remaining > 0 {
glog.V(4).Infof("zero [%d,%d)", offset, offset+remaining)
@@ -167,14 +168,15 @@ func ReadAll(buffer []byte, masterClient *wdclient.MasterClient, chunks []*filer
idx := 0
for _, chunkView := range chunkViews {
for x := chunkViews.Front(); x != nil; x = x.Next {
chunkView := x.Value
urlStrings, err := lookupFileIdFn(chunkView.FileId)
if err != nil {
glog.V(1).Infof("operation LookupFileId %s failed, err: %v", chunkView.FileId, err)
return err
}
n, err := retriedFetchChunkData(buffer[idx:idx+int(chunkView.Size)], urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset)
n, err := retriedFetchChunkData(buffer[idx:idx+int(chunkView.ViewSize)], urlStrings, chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk)
if err != nil {
return err
}
@@ -185,7 +187,7 @@ func ReadAll(buffer []byte, masterClient *wdclient.MasterClient, chunks []*filer
// ---------------- ChunkStreamReader ----------------------------------
type ChunkStreamReader struct {
chunkViews []*ChunkView
chunkView *Interval[*ChunkView]
totalSize int64
logicOffset int64
buffer []byte
@@ -201,17 +203,15 @@ var _ = io.ReaderAt(&ChunkStreamReader{})
func doNewChunkStreamReader(lookupFileIdFn wdclient.LookupFileIdFunctionType, chunks []*filer_pb.FileChunk) *ChunkStreamReader {
chunkViews := ViewFromChunks(lookupFileIdFn, chunks, 0, math.MaxInt64)
slices.SortFunc(chunkViews, func(a, b *ChunkView) bool {
return a.LogicOffset < b.LogicOffset
})
var totalSize int64
for _, chunk := range chunkViews {
totalSize += int64(chunk.Size)
for x := chunkViews.Front(); x != nil; x = x.Next {
chunk := x.Value
totalSize += int64(chunk.ViewSize)
}
return &ChunkStreamReader{
chunkViews: chunkViews,
chunkView: chunkViews.Front(),
lookupFileId: lookupFileIdFn,
totalSize: totalSize,
}
@@ -290,7 +290,7 @@ func (c *ChunkStreamReader) Seek(offset int64, whence int) (int64, error) {
}
func insideChunk(offset int64, chunk *ChunkView) bool {
return chunk.LogicOffset <= offset && offset < chunk.LogicOffset+int64(chunk.Size)
return chunk.ViewOffset <= offset && offset < chunk.ViewOffset+int64(chunk.ViewSize)
}
func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
@@ -300,48 +300,22 @@ func (c *ChunkStreamReader) prepareBufferFor(offset int64) (err error) {
}
// fmt.Printf("fetch for offset %d\n", offset)
// need to seek to a different chunk
currentChunkIndex := sort.Search(len(c.chunkViews), func(i int) bool {
return offset < c.chunkViews[i].LogicOffset
})
if currentChunkIndex == len(c.chunkViews) {
// not found
if insideChunk(offset, c.chunkViews[0]) {
// fmt.Printf("select0 chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
currentChunkIndex = 0
} else if insideChunk(offset, c.chunkViews[len(c.chunkViews)-1]) {
currentChunkIndex = len(c.chunkViews) - 1
// fmt.Printf("select last chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
} else {
return io.EOF
}
} else if currentChunkIndex > 0 {
if insideChunk(offset, c.chunkViews[currentChunkIndex]) {
// good hit
} else if insideChunk(offset, c.chunkViews[currentChunkIndex-1]) {
currentChunkIndex -= 1
// fmt.Printf("select -1 chunk %d %s\n", currentChunkIndex, c.chunkViews[currentChunkIndex].FileId)
} else {
// glog.Fatalf("unexpected1 offset %d", offset)
return fmt.Errorf("unexpected1 offset %d", offset)
}
} else {
// glog.Fatalf("unexpected2 offset %d", offset)
return fmt.Errorf("unexpected2 offset %d", offset)
c.chunkView = c.chunkView.Next
if c.chunkView == nil {
return io.EOF
}
// positioning within the new chunk
chunk := c.chunkViews[currentChunkIndex]
chunk := c.chunkView.Value
if insideChunk(offset, chunk) {
if c.isBufferEmpty() || c.bufferOffset != chunk.LogicOffset {
if c.isBufferEmpty() || c.bufferOffset != chunk.ViewOffset {
if err = c.fetchChunkToBuffer(chunk); err != nil {
return
}
}
} else {
// glog.Fatalf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
return fmt.Errorf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.LogicOffset, chunk.LogicOffset+int64(chunk.Size))
// glog.Fatalf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.ViewOffset, chunk.ViewOffset+int64(chunk.ViewSize))
return fmt.Errorf("unexpected3 offset %d in %s [%d,%d)", offset, chunk.FileId, chunk.ViewOffset, chunk.ViewOffset+int64(chunk.ViewSize))
}
return
}
@@ -355,7 +329,7 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
var buffer bytes.Buffer
var shouldRetry bool
for _, urlString := range urlStrings {
shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.Offset, int(chunkView.Size), func(data []byte) {
shouldRetry, err = util.ReadUrlAsStream(urlString+"?readDeleted=true", chunkView.CipherKey, chunkView.IsGzipped, chunkView.IsFullChunk(), chunkView.OffsetInChunk, int(chunkView.ViewSize), func(data []byte) {
buffer.Write(data)
})
if !shouldRetry {
@@ -372,10 +346,10 @@ func (c *ChunkStreamReader) fetchChunkToBuffer(chunkView *ChunkView) error {
return err
}
c.buffer = buffer.Bytes()
c.bufferOffset = chunkView.LogicOffset
c.bufferOffset = chunkView.ViewOffset
c.chunk = chunkView.FileId
// glog.V(0).Infof("fetched %s [%d,%d)", chunkView.FileId, chunkView.LogicOffset, chunkView.LogicOffset+int64(chunkView.Size))
// glog.V(0).Infof("fetched %s [%d,%d)", chunkView.FileId, chunkView.ViewOffset, chunkView.ViewOffset+int64(chunkView.ViewSize))
return nil
}