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Allow cluster to start when only n/2 servers are up (#4066)

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Fixes #3234.

Relaxes the quorum requirement to start the object layer, and skips
quick-healing at start-up (as no write quorum is present).
This commit is contained in:
Aditya Manthramurthy
2017-04-09 12:58:27 +05:30
committed by Harshavardhana
parent 6e9ac8db59
commit 604417baf4
2 changed files with 14 additions and 3 deletions
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7
cmd/prepare-storage.go
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@@ -132,13 +132,14 @@ func prepForInitXL(firstDisk bool, sErrs []error, diskCount int) InitActions {
}
quorum := diskCount/2 + 1
readQuorum := diskCount / 2
disksOffline := errMap[errDiskNotFound]
disksFormatted := errMap[nil]
disksUnformatted := errMap[errUnformattedDisk]
disksCorrupted := errMap[errCorruptedFormat]
// No Quorum lots of offline disks, wait for quorum.
if disksOffline >= quorum {
if disksOffline > readQuorum {
return WaitForQuorum
}
@@ -168,7 +169,7 @@ func prepForInitXL(firstDisk bool, sErrs []error, diskCount int) InitActions {
}
// Already formatted and in quorum, proceed to initialization of object layer.
if disksFormatted >= quorum {
if disksFormatted >= readQuorum {
if disksFormatted+disksOffline == diskCount {
return InitObjectLayer
}
@@ -293,7 +294,7 @@ func initStorageDisks(endpoints []*url.URL) ([]StorageAPI, error) {
return storageDisks, nil
}
// Format disks before initialization object layer.
// Format disks before initialization of object layer.
func waitForFormatXLDisks(firstDisk bool, endpoints []*url.URL, storageDisks []StorageAPI) (formattedDisks []StorageAPI, err error) {
if len(endpoints) == 0 {
return nil, errInvalidArgument