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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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7
cmd/notification.go
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@@ -466,7 +466,6 @@ func (sys *NotificationSys) ServerInfo(ctx context.Context) []ServerInfo {
// GetLocks - makes GetLocks RPC call on all peers.
func (sys *NotificationSys) GetLocks(ctx context.Context) []*PeerLocks {
locksResp := make([]*PeerLocks, len(sys.peerClients))
g := errgroup.WithNErrs(len(sys.peerClients))
for index, client := range sys.peerClients {
@@ -703,7 +702,7 @@ func (sys *NotificationSys) initListeners(ctx context.Context, objAPI ObjectLaye
// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
// and configFile, take a transaction lock to avoid data race between readConfig()
// and saveConfig().
objLock := globalNSMutex.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
objLock := objAPI.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
if err := objLock.GetRLock(globalOperationTimeout); err != nil {
return err
}
@@ -1344,7 +1343,7 @@ func SaveListener(objAPI ObjectLayer, bucketName string, eventNames []event.Name
// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
// and configFile, take a transaction lock to avoid data race between readConfig()
// and saveConfig().
objLock := globalNSMutex.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
objLock := objAPI.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
if err := objLock.GetLock(globalOperationTimeout); err != nil {
return err
}
@@ -1395,7 +1394,7 @@ func RemoveListener(objAPI ObjectLayer, bucketName string, targetID event.Target
// As object layer's GetObject() and PutObject() take respective lock on minioMetaBucket
// and configFile, take a transaction lock to avoid data race between readConfig()
// and saveConfig().
objLock := globalNSMutex.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
objLock := objAPI.NewNSLock(ctx, minioMetaBucket, transactionConfigFile)
if err := objLock.GetLock(globalOperationTimeout); err != nil {
return err
}