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XL: Implement strided erasure distribution. (#1772)

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Strided erasure distribution uses a new randomized
block distribution for each Put operation. This
information is captured inside `xl.json` for subsequent
Get operations.
This commit is contained in:
Harshavardhana
2016-05-26 19:55:48 -07:00
committed by Harshavardhana
parent 6dc8323684
commit d65101a8c8
7 changed files with 36 additions and 18 deletions
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5
xl-v1-multipart.go
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@@ -136,11 +136,14 @@ func (xl xlObjects) putObjectPartCommon(bucket string, object string, uploadID s
if err != nil {
return "", toObjectErr(err, bucket, object)
}
// Increment version only if we have online disks less than configured storage disks.
if diskCount(onlineDisks) < len(xl.storageDisks) {
higherVersion++
}
erasure := newErasure(onlineDisks) // Initialize a new erasure with online disks
// Initialize a new erasure with online disks and new distribution.
erasure := newErasure(onlineDisks, xlMeta.Erasure.Distribution)
partSuffix := fmt.Sprintf("object%d", partID)
tmpPartPath := path.Join(tmpMetaPrefix, bucket, object, uploadID, partSuffix)