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FS/Multipart: Do not rename append files to another tmp file as the append files are already in tmp location. (#2612)

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This commit is contained in:
Krishna Srinivas 2016-09-03 00:47:32 +05:30 committed by Harshavardhana
parent c4a7b950a0
commit 92e49eab5a
1 changed files with 13 additions and 20 deletions
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33
cmd/fs-v1-multipart.go
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@ -303,6 +303,13 @@ func getFSAppendDataPath(uploadID string) string {
// Append parts to fsAppendDataFile.
func appendParts(disk StorageAPI, bucket, object, uploadID, opsID string) {
cleanupAppendPaths := func() {
// In case of any error, cleanup the append data and json files
// from the tmp so that we do not have any inconsistent append
// data/json files.
disk.DeleteFile(bucket, getFSAppendDataPath(uploadID))
disk.DeleteFile(bucket, getFSAppendMetaPath(uploadID))
}
uploadIDPath := path.Join(mpartMetaPrefix, bucket, object, uploadID)
// fs-append.json path
fsAppendMetaPath := getFSAppendMetaPath(uploadID)
@ -324,6 +331,7 @@ func appendParts(disk StorageAPI, bucket, object, uploadID, opsID string) {
fsAppendMeta, err := readFSMetadata(disk, minioMetaBucket, fsAppendMetaPath)
if err != nil {
if errorCause(err) != errFileNotFound {
cleanupAppendPaths()
return
}
fsAppendMeta = fsMeta
@ -342,21 +350,6 @@ func appendParts(disk StorageAPI, bucket, object, uploadID, opsID string) {
// Proceed to append "part"
fsAppendDataPath := getFSAppendDataPath(uploadID)
tmpDataPath := path.Join(tmpMetaPrefix, getUUID())
if part.Number != 1 {
// Move it to tmp location before appending so that we don't leave inconsitent data
// if server crashes during append operation.
err = disk.RenameFile(minioMetaBucket, fsAppendDataPath, minioMetaBucket, tmpDataPath)
if err != nil {
return
}
// Delete fs-append.json so that we don't leave a stale file if server crashes
// when the part is being appended to the tmp file.
err = disk.DeleteFile(minioMetaBucket, fsAppendMetaPath)
if err != nil {
return
}
}
// Path to the part that needs to be appended.
partPath = path.Join(mpartMetaPrefix, bucket, object, uploadID, part.Name)
offset := int64(0)
@ -370,7 +363,8 @@ func appendParts(disk StorageAPI, bucket, object, uploadID, opsID string) {
var n int64
n, err = disk.ReadFile(minioMetaBucket, partPath, offset, buf[:curLeft])
if n > 0 {
if err = disk.AppendFile(minioMetaBucket, tmpDataPath, buf[:n]); err != nil {
if err = disk.AppendFile(minioMetaBucket, fsAppendDataPath, buf[:n]); err != nil {
cleanupAppendPaths()
return
}
}
@ -378,17 +372,16 @@ func appendParts(disk StorageAPI, bucket, object, uploadID, opsID string) {
if err == io.EOF || err == io.ErrUnexpectedEOF {
break
}
cleanupAppendPaths()
return
}
offset += n
totalLeft -= n
}
// All good, the part has been appended to the tmp file, rename it back.
if err = disk.RenameFile(minioMetaBucket, tmpDataPath, minioMetaBucket, fsAppendDataPath); err != nil {
return
}
fsAppendMeta.AddObjectPart(part.Number, part.Name, part.ETag, part.Size)
// Overwrite previous fs-append.json
if err = writeFSMetadata(disk, minioMetaBucket, fsAppendMetaPath, fsAppendMeta); err != nil {
cleanupAppendPaths()
return
}
// If there are more parts that need to be appended to fsAppendDataFile