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1f8b9b4bd5
there is a possibility that slow drives can actually add latency to the overall call, leading to a large spike in latency. this can happen if there are other parallel listObjects() calls to the same drive, in-turn causing each other to sort of serialize. this potentially improves performance and makes PutObject() also non-blocking.
125 lines
3.0 KiB
Go
125 lines
3.0 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"sync"
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"time"
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"github.com/minio/madmin-go/v3"
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)
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const (
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mrfOpsQueueSize = 100000
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)
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// partialOperation is a successful upload/delete of an object
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// but not written in all disks (having quorum)
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type partialOperation struct {
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bucket string
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object string
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versionID string
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allVersions bool
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setIndex, poolIndex int
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queued time.Time
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}
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// mrfState sncapsulates all the information
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// related to the global background MRF.
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type mrfState struct {
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ctx context.Context
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pools *erasureServerPools
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mu sync.Mutex
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opCh chan partialOperation
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}
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// Initialize healing MRF subsystem
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func (m *mrfState) init(ctx context.Context, objAPI ObjectLayer) {
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m.mu.Lock()
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defer m.mu.Unlock()
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m.ctx = ctx
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m.opCh = make(chan partialOperation, mrfOpsQueueSize)
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var ok bool
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m.pools, ok = objAPI.(*erasureServerPools)
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if ok {
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go m.healRoutine()
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}
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}
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// Add a partial S3 operation (put/delete) when one or more disks are offline.
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func (m *mrfState) addPartialOp(op partialOperation) {
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if m == nil {
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return
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}
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select {
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case m.opCh <- op:
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default:
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}
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}
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var healSleeper = newDynamicSleeper(5, time.Second, false)
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// healRoutine listens to new disks reconnection events and
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// issues healing requests for queued objects belonging to the
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// corresponding erasure set
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func (m *mrfState) healRoutine() {
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for {
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select {
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case <-m.ctx.Done():
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return
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case u, ok := <-m.opCh:
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if !ok {
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return
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}
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now := time.Now()
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if now.Sub(u.queued) < time.Second {
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// let recently failed networks to reconnect
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// making MRF wait for 1s before retrying,
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// i.e 4 reconnect attempts.
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time.Sleep(1 * time.Second)
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}
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// wait on timer per heal
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wait := healSleeper.Timer(context.Background())
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if u.object == "" {
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healBucket(u.bucket, madmin.HealNormalScan)
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} else {
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if u.allVersions {
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m.pools.serverPools[u.poolIndex].sets[u.setIndex].listAndHeal(u.bucket, u.object, healObjectVersionsDisparity)
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} else {
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healObject(u.bucket, u.object, u.versionID, madmin.HealNormalScan)
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}
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}
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wait()
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}
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}
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}
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// Initialize healing MRF
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func initHealMRF(ctx context.Context, obj ObjectLayer) {
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globalMRFState.init(ctx, obj)
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}
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