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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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cmd/admin-handlers.go
+20 -9
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@@ -476,7 +476,13 @@ func (a adminAPIHandlers) PerfInfoHandler(w http.ResponseWriter, r *http.Request
}
func newLockEntry(l lockRequesterInfo, resource, server string) *madmin.LockEntry {
entry := &madmin.LockEntry{Timestamp: l.Timestamp, Resource: resource, ServerList: []string{server}, Owner: l.Node, Source: l.Source, ID: l.UID}
entry := &madmin.LockEntry{
Timestamp: l.Timestamp,
Resource: resource,
ServerList: []string{server},
Source: l.Source,
ID: l.UID,
}
if l.Writer {
entry.Type = "Write"
} else {
@@ -491,12 +497,14 @@ func topLockEntries(peerLocks []*PeerLocks) madmin.LockEntries {
if peerLock == nil {
continue
}
for k, v := range peerLock.Locks {
for _, lockReqInfo := range v {
if val, ok := entryMap[lockReqInfo.UID]; ok {
val.ServerList = append(val.ServerList, peerLock.Addr)
} else {
entryMap[lockReqInfo.UID] = newLockEntry(lockReqInfo, k, peerLock.Addr)
for _, locks := range peerLock.Locks {
for k, v := range locks {
for _, lockReqInfo := range v {
if val, ok := entryMap[lockReqInfo.UID]; ok {
val.ServerList = append(val.ServerList, peerLock.Addr)
} else {
entryMap[lockReqInfo.UID] = newLockEntry(lockReqInfo, k, peerLock.Addr)
}
}
}
}
@@ -531,10 +539,13 @@ func (a adminAPIHandlers) TopLocksHandler(w http.ResponseWriter, r *http.Request
peerLocks := globalNotificationSys.GetLocks(ctx)
// Once we have received all the locks currently used from peers
// add the local peer locks list as well.
localLocks := globalLockServer.ll.DupLockMap()
var getRespLocks GetLocksResp
for _, llocker := range globalLockServers {
getRespLocks = append(getRespLocks, llocker.DupLockMap())
}
peerLocks = append(peerLocks, &PeerLocks{
Addr: getHostName(r),
Locks: localLocks,
Locks: getRespLocks,
})
topLocks := topLockEntries(peerLocks)