forked from minio/minio
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mrf.go
246 lines (207 loc) · 5.61 KB
/
mrf.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
// 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"
"time"
"github.com/minio/madmin-go"
"github.com/nitrictech/minio/internal/logger"
)
const (
mrfInfoResetInterval = 10 * time.Second
mrfOpsQueueSize = 10000
)
// partialOperation is a successful upload/delete of an object
// but not written in all disks (having quorum)
type partialOperation struct {
bucket string
object string
versionID string
size int64
setIndex int
poolIndex int
}
type setInfo struct {
index, pool int
}
// mrfState sncapsulates all the information
// related to the global background MRF.
type mrfState struct {
ready int32 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
_ int32 // For 64 bits alignment
ctx context.Context
objectAPI ObjectLayer
mu sync.Mutex
opCh chan partialOperation
pendingOps map[partialOperation]setInfo
setReconnectEvent chan setInfo
itemsHealed uint64
bytesHealed uint64
pendingItems uint64
pendingBytes uint64
triggeredAt time.Time
}
// Initialize healing MRF subsystem
func (m *mrfState) init(ctx context.Context, objAPI ObjectLayer) {
m.mu.Lock()
defer m.mu.Unlock()
m.ctx = ctx
m.objectAPI = objAPI
m.opCh = make(chan partialOperation, mrfOpsQueueSize)
m.pendingOps = make(map[partialOperation]setInfo)
m.setReconnectEvent = make(chan setInfo)
go globalMRFState.maintainMRFList()
go globalMRFState.healRoutine()
atomic.StoreInt32(&m.ready, 1)
}
func (m *mrfState) initialized() bool {
return atomic.LoadInt32(&m.ready) != 0
}
// Add a partial S3 operation (put/delete) when one or more disks are offline.
func (m *mrfState) addPartialOp(op partialOperation) {
if !m.initialized() {
return
}
select {
case m.opCh <- op:
default:
}
}
// Receive the new set (disk) reconnection event
func (m *mrfState) newSetReconnected(pool, set int) {
if !m.initialized() {
return
}
idler := time.NewTimer(100 * time.Millisecond)
defer idler.Stop()
select {
case m.setReconnectEvent <- setInfo{index: set, pool: pool}:
case <-idler.C:
}
}
// Get current MRF stats of the last MRF activity
func (m *mrfState) getCurrentMRFRoundInfo() madmin.MRFStatus {
m.mu.Lock()
triggeredAt := m.triggeredAt
itemsHealed := m.itemsHealed
bytesHealed := m.bytesHealed
pendingItems := m.pendingItems
pendingBytes := m.pendingBytes
m.mu.Unlock()
if pendingItems == 0 {
return madmin.MRFStatus{}
}
return madmin.MRFStatus{
Started: triggeredAt,
ItemsHealed: itemsHealed,
BytesHealed: bytesHealed,
TotalItems: itemsHealed + pendingItems,
TotalBytes: bytesHealed + pendingBytes,
}
}
// maintainMRFList gathers the list of successful partial uploads
// from all underlying er.sets and puts them in a global map which
// should not have more than 10000 entries.
func (m *mrfState) maintainMRFList() {
for fOp := range m.opCh {
m.mu.Lock()
if len(m.pendingOps) > mrfOpsQueueSize {
m.mu.Unlock()
continue
}
m.pendingOps[fOp] = setInfo{index: fOp.setIndex, pool: fOp.poolIndex}
m.pendingItems++
if fOp.size > 0 {
m.pendingBytes += uint64(fOp.size)
}
m.mu.Unlock()
}
}
// Reset current MRF stats
func (m *mrfState) resetMRFInfoIfNoPendingOps() {
m.mu.Lock()
defer m.mu.Unlock()
if m.pendingItems > 0 {
return
}
m.itemsHealed = 0
m.bytesHealed = 0
m.pendingItems = 0
m.pendingBytes = 0
m.triggeredAt = time.Time{}
}
// healRoutine listens to new disks reconnection events and
// issues healing requests for queued objects belonging to the
// corresponding erasure set
func (m *mrfState) healRoutine() {
idler := time.NewTimer(mrfInfoResetInterval)
defer idler.Stop()
mrfHealingOpts := madmin.HealOpts{
ScanMode: madmin.HealNormalScan,
Remove: healDeleteDangling,
}
for {
select {
case <-m.ctx.Done():
return
case <-idler.C:
m.resetMRFInfoIfNoPendingOps()
idler.Reset(mrfInfoResetInterval)
case setInfo := <-m.setReconnectEvent:
// Get the list of objects related the er.set
// to which the connected disk belongs.
var mrfOperations []partialOperation
m.mu.Lock()
for k, v := range m.pendingOps {
if v == setInfo {
mrfOperations = append(mrfOperations, k)
}
}
m.mu.Unlock()
if len(mrfOperations) == 0 {
continue
}
m.mu.Lock()
m.triggeredAt = time.Now().UTC()
m.mu.Unlock()
// Heal objects
for _, u := range mrfOperations {
_, err := m.objectAPI.HealObject(m.ctx, u.bucket, u.object, u.versionID, mrfHealingOpts)
m.mu.Lock()
if err == nil {
m.itemsHealed++
m.bytesHealed += uint64(u.size)
}
m.pendingItems--
m.pendingBytes -= uint64(u.size)
delete(m.pendingOps, u)
m.mu.Unlock()
if !isErrObjectNotFound(err) && !isErrVersionNotFound(err) {
// Log healing error if any
logger.LogIf(m.ctx, err)
}
}
waitForLowHTTPReq()
}
}
}
// Initialize healing MRF
func initHealMRF(ctx context.Context, obj ObjectLayer) {
globalMRFState.init(ctx, obj)
}