minio/cmd/bucket-replication-stats.go

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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"context"
"sync"
"sync/atomic"
"github.com/minio/minio/pkg/bucket/replication"
)
func (b *BucketReplicationStats) hasReplicationUsage() bool {
return b.PendingSize > 0 ||
b.FailedSize > 0 ||
b.ReplicatedSize > 0 ||
b.ReplicaSize > 0 ||
b.PendingCount > 0 ||
b.FailedCount > 0
}
// ReplicationStats holds the global in-memory replication stats
type ReplicationStats struct {
sync.RWMutex
Cache map[string]*BucketReplicationStats
UsageCache map[string]*BucketReplicationStats // initial usage
}
// Delete deletes in-memory replication statistics for a bucket.
func (r *ReplicationStats) Delete(bucket string) {
if r == nil {
return
}
r.Lock()
defer r.Unlock()
delete(r.Cache, bucket)
delete(r.UsageCache, bucket)
}
// Update updates in-memory replication statistics with new values.
func (r *ReplicationStats) Update(bucket string, n int64, status, prevStatus replication.StatusType, opType replication.Type) {
if r == nil {
return
}
r.RLock()
b, ok := r.Cache[bucket]
if !ok {
b = &BucketReplicationStats{}
}
r.RUnlock()
switch status {
case replication.Pending:
if opType == replication.ObjectReplicationType {
atomic.AddUint64(&b.PendingSize, uint64(n))
}
atomic.AddUint64(&b.PendingCount, 1)
case replication.Completed:
switch prevStatus { // adjust counters based on previous state
case replication.Pending:
atomic.AddUint64(&b.PendingCount, ^uint64(0))
case replication.Failed:
atomic.AddUint64(&b.FailedCount, ^uint64(0))
}
if opType == replication.ObjectReplicationType {
atomic.AddUint64(&b.ReplicatedSize, uint64(n))
switch prevStatus {
case replication.Pending:
atomic.AddUint64(&b.PendingSize, ^uint64(n-1))
case replication.Failed:
atomic.AddUint64(&b.FailedSize, ^uint64(n-1))
}
}
case replication.Failed:
// count failures only once - not on every retry
switch prevStatus { // adjust counters based on previous state
case replication.Pending:
atomic.AddUint64(&b.PendingCount, ^uint64(0))
}
if opType == replication.ObjectReplicationType {
if prevStatus == replication.Pending {
atomic.AddUint64(&b.FailedSize, uint64(n))
atomic.AddUint64(&b.FailedCount, 1)
atomic.AddUint64(&b.PendingSize, ^uint64(n-1))
}
}
case replication.Replica:
if opType == replication.ObjectReplicationType {
atomic.AddUint64(&b.ReplicaSize, uint64(n))
}
}
r.Lock()
r.Cache[bucket] = b
r.Unlock()
}
// GetInitialUsage get replication metrics available at the time of cluster initialization
func (r *ReplicationStats) GetInitialUsage(bucket string) BucketReplicationStats {
if r == nil {
return BucketReplicationStats{}
}
r.RLock()
defer r.RUnlock()
st, ok := r.UsageCache[bucket]
if !ok {
return BucketReplicationStats{}
}
return BucketReplicationStats{
PendingSize: atomic.LoadUint64(&st.PendingSize),
FailedSize: atomic.LoadUint64(&st.FailedSize),
ReplicatedSize: atomic.LoadUint64(&st.ReplicatedSize),
ReplicaSize: atomic.LoadUint64(&st.ReplicaSize),
PendingCount: atomic.LoadUint64(&st.PendingCount),
FailedCount: atomic.LoadUint64(&st.FailedCount),
}
}
// Get replication metrics for a bucket from this node since this node came up.
func (r *ReplicationStats) Get(bucket string) BucketReplicationStats {
if r == nil {
return BucketReplicationStats{}
}
r.RLock()
defer r.RUnlock()
st, ok := r.Cache[bucket]
if !ok {
return BucketReplicationStats{}
}
return BucketReplicationStats{
PendingSize: atomic.LoadUint64(&st.PendingSize),
FailedSize: atomic.LoadUint64(&st.FailedSize),
ReplicatedSize: atomic.LoadUint64(&st.ReplicatedSize),
ReplicaSize: atomic.LoadUint64(&st.ReplicaSize),
PendingCount: atomic.LoadUint64(&st.PendingCount),
FailedCount: atomic.LoadUint64(&st.FailedCount),
}
}
// NewReplicationStats initialize in-memory replication statistics
func NewReplicationStats(ctx context.Context, objectAPI ObjectLayer) *ReplicationStats {
st := &ReplicationStats{
Cache: make(map[string]*BucketReplicationStats),
UsageCache: make(map[string]*BucketReplicationStats),
}
dataUsageInfo, err := loadDataUsageFromBackend(ctx, objectAPI)
if err != nil {
return st
}
// data usage has not captured any data yet.
if dataUsageInfo.LastUpdate.IsZero() {
return st
}
for bucket, usage := range dataUsageInfo.BucketsUsage {
b := &BucketReplicationStats{
PendingSize: usage.ReplicationPendingSize,
FailedSize: usage.ReplicationFailedSize,
ReplicatedSize: usage.ReplicatedSize,
ReplicaSize: usage.ReplicaSize,
PendingCount: usage.ReplicationPendingCount,
FailedCount: usage.ReplicationFailedCount,
}
if b.hasReplicationUsage() {
st.UsageCache[bucket] = b
}
}
return st
}