add back writes to swap file when too many in memory chunks are used.

weed/mount/dirty_pages_chunked.go

@@ -30,7 +30,10 @@ func newMemoryChunkPages(fh *FileHandle, chunkSize int64) *ChunkedDirtyPages {
 		fh: fh,
 	}
 
-	dirtyPages.uploadPipeline = page_writer.NewUploadPipeline(fh.wfs.concurrentWriters, chunkSize, dirtyPages.saveChunkedFileIntevalToStorage, fh.wfs.option.ConcurrentWriters)
+	swapFileDir := fh.wfs.option.getTempFilePageDir()
+
+	dirtyPages.uploadPipeline = page_writer.NewUploadPipeline(fh.wfs.concurrentWriters, chunkSize,
+		dirtyPages.saveChunkedFileIntevalToStorage, fh.wfs.option.ConcurrentWriters, swapFileDir)
 
 	return dirtyPages
 }

weed/mount/page_writer.go

@@ -23,7 +23,6 @@ func newPageWriter(fh *FileHandle, chunkSize int64) *PageWriter {
 		fh:           fh,
 		chunkSize:    chunkSize,
 		randomWriter: newMemoryChunkPages(fh, chunkSize),
-		// randomWriter: newTempFileDirtyPages(fh.f, chunkSize),
 	}
 	return pw
 }

weed/mount/page_writer/page_chunk_mem.go

@@ -3,10 +3,13 @@ package page_writer
 import (
 	"github.com/chrislusf/seaweedfs/weed/util"
 	"github.com/chrislusf/seaweedfs/weed/util/mem"
+	"sync/atomic"
 )
 
 var (
 	_ = PageChunk(&MemChunk{})
+
+	memChunkCounter int64
 )
 
 type MemChunk struct {
@@ -17,6 +20,7 @@ type MemChunk struct {
 }
 
 func NewMemChunk(logicChunkIndex LogicChunkIndex, chunkSize int64) *MemChunk {
+	atomic.AddInt64(&memChunkCounter, 1)
 	return &MemChunk{
 		logicChunkIndex: logicChunkIndex,
 		chunkSize:       chunkSize,
@@ -26,6 +30,7 @@ func NewMemChunk(logicChunkIndex LogicChunkIndex, chunkSize int64) *MemChunk {
 }
 
 func (mc *MemChunk) FreeResource() {
+	atomic.AddInt64(&memChunkCounter, -1)
 	mem.Free(mc.buf)
 }
 

weed/mount/page_writer/upload_pipeline.go

@@ -25,6 +25,7 @@ type UploadPipeline struct {
 	activeReadChunks     map[LogicChunkIndex]int
 	activeReadChunksLock sync.Mutex
 	bufferChunkLimit     int
+	swapFile             *SwapFile
 }
 
 type SealedChunk struct {
@@ -40,7 +41,7 @@ func (sc *SealedChunk) FreeReference(messageOnFree string) {
 	}
 }
 
-func NewUploadPipeline(writers *util.LimitedConcurrentExecutor, chunkSize int64, saveToStorageFn SaveToStorageFunc, bufferChunkLimit int) *UploadPipeline {
+func NewUploadPipeline(writers *util.LimitedConcurrentExecutor, chunkSize int64, saveToStorageFn SaveToStorageFunc, bufferChunkLimit int, swapFileDir string) *UploadPipeline {
 	return &UploadPipeline{
 		ChunkSize:         chunkSize,
 		writableChunks:    make(map[LogicChunkIndex]PageChunk),
@@ -50,6 +51,7 @@ func NewUploadPipeline(writers *util.LimitedConcurrentExecutor, chunkSize int64,
 		saveToStorageFn:   saveToStorageFn,
 		activeReadChunks:  make(map[LogicChunkIndex]int),
 		bufferChunkLimit:  bufferChunkLimit,
+		swapFile:          NewSwapFile(swapFileDir, chunkSize),
 	}
 }
 
@@ -59,10 +61,14 @@ func (up *UploadPipeline) SaveDataAt(p []byte, off int64) (n int) {
 
 	logicChunkIndex := LogicChunkIndex(off / up.ChunkSize)
 
-	memChunk, found := up.writableChunks[logicChunkIndex]
+	pageChunk, found := up.writableChunks[logicChunkIndex]
 	if !found {
-		if len(up.writableChunks) < up.bufferChunkLimit {
-			memChunk = NewMemChunk(logicChunkIndex, up.ChunkSize)
+		if atomic.LoadInt64(&memChunkCounter) > 4*int64(up.bufferChunkLimit) {
+			// if total number of chunks is over 4 times of per file buffer count limit
+			pageChunk = up.swapFile.NewTempFileChunk(logicChunkIndex)
+		} else if len(up.writableChunks) < up.bufferChunkLimit {
+			// if current file chunks is still under the per file buffer count limit
+			pageChunk = NewMemChunk(logicChunkIndex, up.ChunkSize)
 		} else {
 			fullestChunkIndex, fullness := LogicChunkIndex(-1), int64(0)
 			for lci, mc := range up.writableChunks {
@@ -75,12 +81,12 @@ func (up *UploadPipeline) SaveDataAt(p []byte, off int64) (n int) {
 			up.moveToSealed(up.writableChunks[fullestChunkIndex], fullestChunkIndex)
 			delete(up.writableChunks, fullestChunkIndex)
 			// fmt.Printf("flush chunk %d with %d bytes written\n", logicChunkIndex, fullness)
-			memChunk = NewMemChunk(logicChunkIndex, up.ChunkSize)
+			pageChunk = NewMemChunk(logicChunkIndex, up.ChunkSize)
 		}
-		up.writableChunks[logicChunkIndex] = memChunk
+		up.writableChunks[logicChunkIndex] = pageChunk
 	}
-	n = memChunk.WriteDataAt(p, off)
-	up.maybeMoveToSealed(memChunk, logicChunkIndex)
+	n = pageChunk.WriteDataAt(p, off)
+	up.maybeMoveToSealed(pageChunk, logicChunkIndex)
 
 	return
 }
@@ -179,6 +185,7 @@ func (up *UploadPipeline) moveToSealed(memChunk PageChunk, logicChunkIndex Logic
 }
 
 func (up *UploadPipeline) Shutdown() {
+	up.swapFile.FreeResource()
 	for logicChunkIndex, sealedChunk := range up.sealedChunks {
 		sealedChunk.FreeReference(fmt.Sprintf("%s uploadpipeline shutdown chunk %d", up.filepath, logicChunkIndex))
 	}

weed/mount/page_writer/upload_pipeline_test.go

@@ -7,7 +7,7 @@ import (
 
 func TestUploadPipeline(t *testing.T) {
 
-	uploadPipeline := NewUploadPipeline(nil, 2*1024*1024, nil, 16)
+	uploadPipeline := NewUploadPipeline(nil, 2*1024*1024, nil, 16, "")
 
 	writeRange(uploadPipeline, 0, 131072)
 	writeRange(uploadPipeline, 131072, 262144)

weed/mount/weedfs.go

@@ -16,6 +16,7 @@ import (
 	"math/rand"
 	"os"
 	"path"
+	"path/filepath"
 	"time"
 
 	"github.com/hanwen/go-fuse/v2/fs"
@@ -51,6 +52,7 @@ type Option struct {
 	UidGidMapper       *meta_cache.UidGidMapper
 
 	uniqueCacheDir         string
+	uniqueCacheTempPageDir string
 }
 
 type WFS struct {
@@ -177,7 +179,12 @@ func (wfs *WFS) getCurrentFiler() pb.ServerAddress {
 func (option *Option) setupUniqueCacheDirectory() {
 	cacheUniqueId := util.Md5String([]byte(option.MountDirectory + string(option.FilerAddresses[0]) + option.FilerMountRootPath + util.Version()))[0:8]
 	option.uniqueCacheDir = path.Join(option.CacheDir, cacheUniqueId)
-	os.MkdirAll(option.uniqueCacheDir, os.FileMode(0777)&^option.Umask)
+	option.uniqueCacheTempPageDir = filepath.Join(option.uniqueCacheDir, "swap")
+	os.MkdirAll(option.uniqueCacheTempPageDir, os.FileMode(0777)&^option.Umask)
+}
+
+func (option *Option) getTempFilePageDir() string {
+	return option.uniqueCacheTempPageDir
 }
 
 func (option *Option) getUniqueCacheDir() string {