mirror of
https://github.com/seaweedfs/seaweedfs.git
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209 lines
6 KiB
Go
209 lines
6 KiB
Go
package filesys
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import (
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"bytes"
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"context"
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"fmt"
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"time"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/operation"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"sync"
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)
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type ContinuousDirtyPages struct {
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hasData bool
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Offset int64
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Size int64
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Data []byte
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f *File
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lock sync.Mutex
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}
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func newDirtyPages(file *File) *ContinuousDirtyPages {
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return &ContinuousDirtyPages{
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Data: make([]byte, file.wfs.option.ChunkSizeLimit),
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f: file,
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}
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}
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func (pages *ContinuousDirtyPages) InitializeToFile(file *File) *ContinuousDirtyPages {
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if len(pages.Data) != int(file.wfs.option.ChunkSizeLimit) {
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pages.Data = make([]byte, file.wfs.option.ChunkSizeLimit)
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}
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pages.f = file
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return pages
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}
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func (pages *ContinuousDirtyPages) AddPage(ctx context.Context, offset int64, data []byte) (chunks []*filer_pb.FileChunk, err error) {
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pages.lock.Lock()
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defer pages.lock.Unlock()
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var chunk *filer_pb.FileChunk
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if len(data) > len(pages.Data) {
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// this is more than what buffer can hold.
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return pages.flushAndSave(ctx, offset, data)
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}
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if offset < pages.Offset || offset >= pages.Offset+int64(len(pages.Data)) ||
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pages.Offset+int64(len(pages.Data)) < offset+int64(len(data)) {
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// if the data is out of range,
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// or buffer is full if adding new data,
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// flush current buffer and add new data
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// println("offset", offset, "size", len(data), "existing offset", pages.Offset, "size", pages.Size)
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if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
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if chunk != nil {
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glog.V(4).Infof("%s/%s add save [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
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chunks = append(chunks, chunk)
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}
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} else {
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glog.V(0).Infof("%s/%s add save [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
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return
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}
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pages.Offset = offset
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copy(pages.Data, data)
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pages.Size = int64(len(data))
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return
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}
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if offset != pages.Offset+pages.Size {
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// when this happens, debug shows the data overlapping with existing data is empty
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// the data is not just append
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if offset == pages.Offset && int(pages.Size) < len(data) {
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// glog.V(2).Infof("pages[%d,%d) pages.Data len=%v, data len=%d, pages.Size=%d", pages.Offset, pages.Offset+pages.Size, len(pages.Data), len(data), pages.Size)
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copy(pages.Data[pages.Size:], data[pages.Size:])
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} else {
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if pages.Size != 0 {
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glog.V(1).Infof("%s/%s add page: pages [%d, %d) write [%d, %d)", pages.f.dir.Path, pages.f.Name, pages.Offset, pages.Offset+pages.Size, offset, offset+int64(len(data)))
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}
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return pages.flushAndSave(ctx, offset, data)
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}
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} else {
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copy(pages.Data[offset-pages.Offset:], data)
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}
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pages.Size = max(pages.Size, offset+int64(len(data))-pages.Offset)
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return
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}
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func (pages *ContinuousDirtyPages) flushAndSave(ctx context.Context, offset int64, data []byte) (chunks []*filer_pb.FileChunk, err error) {
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var chunk *filer_pb.FileChunk
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// flush existing
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if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
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if chunk != nil {
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glog.V(4).Infof("%s/%s flush existing [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
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chunks = append(chunks, chunk)
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}
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} else {
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glog.V(0).Infof("%s/%s failed to flush1 [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
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return
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}
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pages.Size = 0
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pages.Offset = 0
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// flush the new page
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if chunk, err = pages.saveToStorage(ctx, data, offset); err == nil {
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if chunk != nil {
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glog.V(4).Infof("%s/%s flush big request [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
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chunks = append(chunks, chunk)
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}
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} else {
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glog.V(0).Infof("%s/%s failed to flush2 [%d,%d): %v", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size), err)
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return
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}
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return
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}
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func (pages *ContinuousDirtyPages) FlushToStorage(ctx context.Context) (chunk *filer_pb.FileChunk, err error) {
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pages.lock.Lock()
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defer pages.lock.Unlock()
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if pages.Size == 0 {
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return nil, nil
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}
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if chunk, err = pages.saveExistingPagesToStorage(ctx); err == nil {
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pages.Size = 0
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pages.Offset = 0
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if chunk != nil {
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glog.V(4).Infof("%s/%s flush [%d,%d)", pages.f.dir.Path, pages.f.Name, chunk.Offset, chunk.Offset+int64(chunk.Size))
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}
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}
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return
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}
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func (pages *ContinuousDirtyPages) saveExistingPagesToStorage(ctx context.Context) (*filer_pb.FileChunk, error) {
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if pages.Size == 0 {
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return nil, nil
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}
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return pages.saveToStorage(ctx, pages.Data[:pages.Size], pages.Offset)
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}
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func (pages *ContinuousDirtyPages) saveToStorage(ctx context.Context, buf []byte, offset int64) (*filer_pb.FileChunk, error) {
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var fileId, host string
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if err := pages.f.wfs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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request := &filer_pb.AssignVolumeRequest{
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Count: 1,
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Replication: pages.f.wfs.option.Replication,
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Collection: pages.f.wfs.option.Collection,
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TtlSec: pages.f.wfs.option.TtlSec,
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DataCenter: pages.f.wfs.option.DataCenter,
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}
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resp, err := client.AssignVolume(ctx, request)
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if err != nil {
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glog.V(0).Infof("assign volume failure %v: %v", request, err)
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return err
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}
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fileId, host = resp.FileId, resp.Url
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return nil
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}); err != nil {
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return nil, fmt.Errorf("filerGrpcAddress assign volume: %v", err)
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}
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fileUrl := fmt.Sprintf("http://%s/%s", host, fileId)
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bufReader := bytes.NewReader(buf)
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uploadResult, err := operation.Upload(fileUrl, pages.f.Name, bufReader, false, "application/octet-stream", nil, "")
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if err != nil {
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glog.V(0).Infof("upload data %v to %s: %v", pages.f.Name, fileUrl, err)
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return nil, fmt.Errorf("upload data: %v", err)
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}
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if uploadResult.Error != "" {
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glog.V(0).Infof("upload failure %v to %s: %v", pages.f.Name, fileUrl, err)
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return nil, fmt.Errorf("upload result: %v", uploadResult.Error)
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}
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return &filer_pb.FileChunk{
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FileId: fileId,
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Offset: offset,
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Size: uint64(len(buf)),
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Mtime: time.Now().UnixNano(),
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ETag: uploadResult.ETag,
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}, nil
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}
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func max(x, y int64) int64 {
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if x > y {
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return x
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}
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return y
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}
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