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

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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
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19
cmd/erasure-object.go
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@@ -58,7 +58,7 @@ func (er erasureObjects) CopyObject(ctx context.Context, srcBucket, srcObject, d
// Read metadata associated with the object from all disks.
storageDisks := er.getDisks()
metaArr, errs := readAllFileInfo(ctx, storageDisks, srcBucket, srcObject, srcOpts.VersionID)
metaArr, errs := readAllFileInfo(ctx, storageDisks, srcBucket, srcObject, srcOpts.VersionID, false)
// get Quorum for this object
readQuorum, writeQuorum, err := objectQuorumFromMeta(ctx, er, metaArr, errs)
@@ -157,7 +157,7 @@ func (er erasureObjects) GetObjectNInfo(ctx context.Context, bucket, object stri
unlockOnDefer = true
}
fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, bucket, object, opts)
fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, bucket, object, opts, true)
if err != nil {
return nil, toObjectErr(err, bucket, object)
}
@@ -298,7 +298,8 @@ func (er erasureObjects) getObjectWithFileInfo(ctx context.Context, bucket, obje
}
checksumInfo := metaArr[index].Erasure.GetChecksumInfo(partNumber)
partPath := pathJoin(object, metaArr[index].DataDir, fmt.Sprintf("part.%d", partNumber))
readers[index] = newBitrotReader(disk, bucket, partPath, tillOffset,
data := metaArr[index].Data
readers[index] = newBitrotReader(disk, data, bucket, partPath, tillOffset,
checksumInfo.Algorithm, checksumInfo.Hash, erasure.ShardSize())
// Prefer local disks
@@ -337,7 +338,7 @@ func (er erasureObjects) getObjectWithFileInfo(ctx context.Context, bucket, obje
// getObject wrapper for erasure GetObject
func (er erasureObjects) getObject(ctx context.Context, bucket, object string, startOffset, length int64, writer io.Writer, opts ObjectOptions) error {
fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, bucket, object, opts)
fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, bucket, object, opts, true)
if err != nil {
return toObjectErr(err, bucket, object)
}
@@ -364,11 +365,11 @@ func (er erasureObjects) GetObjectInfo(ctx context.Context, bucket, object strin
return er.getObjectInfo(ctx, bucket, object, opts)
}
func (er erasureObjects) getObjectFileInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (fi FileInfo, metaArr []FileInfo, onlineDisks []StorageAPI, err error) {
func (er erasureObjects) getObjectFileInfo(ctx context.Context, bucket, object string, opts ObjectOptions, readData bool) (fi FileInfo, metaArr []FileInfo, onlineDisks []StorageAPI, err error) {
disks := er.getDisks()
// Read metadata associated with the object from all disks.
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID)
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID, readData)
readQuorum, _, err := objectQuorumFromMeta(ctx, er, metaArr, errs)
if err != nil {
@@ -410,7 +411,7 @@ func (er erasureObjects) getObjectFileInfo(ctx context.Context, bucket, object s
// getObjectInfo - wrapper for reading object metadata and constructs ObjectInfo.
func (er erasureObjects) getObjectInfo(ctx context.Context, bucket, object string, opts ObjectOptions) (objInfo ObjectInfo, err error) {
fi, _, _, err := er.getObjectFileInfo(ctx, bucket, object, opts)
fi, _, _, err := er.getObjectFileInfo(ctx, bucket, object, opts, false)
if err != nil {
return objInfo, toObjectErr(err, bucket, object)
}
@@ -1073,7 +1074,7 @@ func (er erasureObjects) PutObjectTags(ctx context.Context, bucket, object strin
disks := er.getDisks()
// Read metadata associated with the object from all disks.
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID)
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID, false)
readQuorum, writeQuorum, err := objectQuorumFromMeta(ctx, er, metaArr, errs)
if err != nil {
@@ -1134,7 +1135,7 @@ func (er erasureObjects) updateObjectMeta(ctx context.Context, bucket, object st
disks := er.getDisks()
// Read metadata associated with the object from all disks.
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID)
metaArr, errs := readAllFileInfo(ctx, disks, bucket, object, opts.VersionID, false)
readQuorum, writeQuorum, err := objectQuorumFromMeta(ctx, er, metaArr, errs)
if err != nil {