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Support MinIO to be deployed on more than 32 nodes (#8492)

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This PR implements locking from a global entity into
a more localized set level entity, allowing for locks
to be held only on the resources which are writing
to a collection of disks rather than a global level.

In this process this PR also removes the top-level
limit of 32 nodes to an unlimited number of nodes. This
is a precursor change before bring in bucket expansion.
This commit is contained in:
Harshavardhana
2019-11-13 12:17:45 -08:00
committed by kannappanr
parent 069b8ee8ff
commit e9b2bf00ad
58 changed files with 2312 additions and 838 deletions
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5
cmd/global-heal.go
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@@ -83,7 +83,8 @@ func healErasureSet(ctx context.Context, setIndex int, xlObj *xlObjects) error {
// Hold a lock for healing the erasure set
zeroDuration := time.Millisecond
zeroDynamicTimeout := newDynamicTimeout(zeroDuration, zeroDuration)
erasureSetHealLock := globalNSMutex.NewNSLock(ctx, "system", fmt.Sprintf("erasure-set-heal-%d", setIndex))
erasureSetHealLock := xlObj.nsMutex.NewNSLock(ctx, xlObj.getLockers(),
"system", fmt.Sprintf("erasure-set-heal-%d", setIndex))
if err := erasureSetHealLock.GetLock(zeroDynamicTimeout); err != nil {
return err
}
@@ -126,7 +127,7 @@ func execLeaderTasks(sets *xlSets) {
ctx := context.Background()
// Hold a lock so only one server performs auto-healing
leaderLock := globalNSMutex.NewNSLock(ctx, minioMetaBucket, "leader")
leaderLock := sets.NewNSLock(ctx, minioMetaBucket, "leader")
for {
err := leaderLock.GetLock(leaderLockTimeout)
if err == nil {