MyFavMirrors/minio
1
0
Fork 0
mirror of https://github.com/minio/minio.git synced 2025-11-07 12:52:58 -05:00
Code Issues Packages Projects Releases Wiki Activity

fix: readData in bulk call using messagepack byte wrappers (#11228)

Browse Source 
This PR refactors the way we use buffers for O_DIRECT and
to re-use those buffers for messagepack reader writer.

After some extensive benchmarking found that not all objects
have this benefit, and only objects smaller than 64KiB see
this benefit overall.

Benefits are seen from almost all objects from

1KiB - 32KiB

Beyond this no objects see benefit with bulk call approach
as the latency of bytes sent over the wire v/s streaming
content directly from disk negate each other with no
remarkable benefits.

All other optimizations include reuse of msgp.Reader,
msgp.Writer using sync.Pool's for all internode calls.
This commit is contained in:
Harshavardhana
2021-01-07 19:27:31 -08:00
committed by GitHub
parent a4f6705874
commit f21d650ed4
24 changed files with 231 additions and 118 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
cmd/bitrot-streaming.go
View File

@@ -91,6 +91,7 @@ func newStreamingBitrotWriter(disk StorageAPI, volume, filePath string, length i
// ReadAt() implementation which verifies the bitrot hash available as part of the stream.
type streamingBitrotReader struct {
disk StorageAPI
data []byte
rc io.Reader
volume string
filePath string
@@ -122,7 +123,11 @@ func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
// For the first ReadAt() call we need to open the stream for reading.
b.currOffset = offset
streamOffset := (offset/b.shardSize)*int64(b.h.Size()) + offset
b.rc, err = b.disk.ReadFileStream(context.TODO(), b.volume, b.filePath, streamOffset, b.tillOffset-streamOffset)
if len(b.data) == 0 {
b.rc, err = b.disk.ReadFileStream(context.TODO(), b.volume, b.filePath, streamOffset, b.tillOffset-streamOffset)
} else {
b.rc = io.NewSectionReader(bytes.NewReader(b.data), streamOffset, b.tillOffset-streamOffset)
}
if err != nil {
return 0, err
}
@@ -154,10 +159,11 @@ func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
}
// Returns streaming bitrot reader implementation.
func newStreamingBitrotReader(disk StorageAPI, volume, filePath string, tillOffset int64, algo BitrotAlgorithm, shardSize int64) *streamingBitrotReader {
func newStreamingBitrotReader(disk StorageAPI, data []byte, volume, filePath string, tillOffset int64, algo BitrotAlgorithm, shardSize int64) *streamingBitrotReader {
h := algo.New()
return &streamingBitrotReader{
disk,
data,
nil,
volume,
filePath,