Repository navigation
Expand file tree
/
Copy pathdata-usage-cache.go
More file actions
641 lines (584 loc) · 16.7 KB
/
Copy pathdata-usage-cache.go
File metadata and controls
641 lines (584 loc) · 16.7 KB
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
/*
* MinIO Cloud Storage, (C) 2020 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"path"
"path/filepath"
"strings"
"time"
"github.com/cespare/xxhash/v2"
"github.com/klauspost/compress/zstd"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/bucket/lifecycle"
"github.com/minio/minio/pkg/hash"
"github.com/tinylib/msgp/msgp"
)
//go:generate msgp -file $GOFILE -unexported
// dataUsageHash is the hash type used.
type dataUsageHash string
// sizeHistogram is a size histogram.
type sizeHistogram [dataUsageBucketLen]uint64
//msgp:tuple dataUsageEntry
type dataUsageEntry struct {
// These fields do no include any children.
Size int64
Objects uint64
ObjSizes sizeHistogram
Children dataUsageHashMap
}
// dataUsageCache contains a cache of data usage entries.
type dataUsageCache struct {
Info dataUsageCacheInfo
Cache map[string]dataUsageEntry
}
//msgp:ignore dataUsageEntryInfo
type dataUsageEntryInfo struct {
Name string
Parent string
Entry dataUsageEntry
}
type dataUsageCacheInfo struct {
// Name of the bucket. Also root element.
Name string
LastUpdate time.Time
NextCycle uint32
BloomFilter []byte `msg:"BloomFilter,omitempty"`
lifeCycle *lifecycle.Lifecycle `msg:"-"`
}
// merge other data usage entry into this, excluding children.
func (e *dataUsageEntry) merge(other dataUsageEntry) {
e.Objects += other.Objects
e.Size += other.Size
for i, v := range other.ObjSizes[:] {
e.ObjSizes[i] += v
}
}
// mod returns true if the hash mod cycles == cycle.
// If cycles is 0 false is always returned.
// If cycles is 1 true is always returned (as expected).
func (h dataUsageHash) mod(cycle uint32, cycles uint32) bool {
if cycles <= 1 {
return cycles == 1
}
return uint32(xxhash.Sum64String(string(h)))%cycles == cycle%cycles
}
// addChildString will add a child based on its name.
// If it already exists it will not be added again.
func (e *dataUsageEntry) addChildString(name string) {
e.addChild(hashPath(name))
}
// addChild will add a child based on its hash.
// If it already exists it will not be added again.
func (e *dataUsageEntry) addChild(hash dataUsageHash) {
if _, ok := e.Children[hash.Key()]; ok {
return
}
if e.Children == nil {
e.Children = make(dataUsageHashMap, 1)
}
e.Children[hash.Key()] = struct{}{}
}
// find a path in the cache.
// Returns nil if not found.
func (d *dataUsageCache) find(path string) *dataUsageEntry {
due, ok := d.Cache[hashPath(path).Key()]
if !ok {
return nil
}
return &due
}
// findChildrenCopy returns a copy of the children of the supplied hash.
func (d *dataUsageCache) findChildrenCopy(h dataUsageHash) dataUsageHashMap {
ch := d.Cache[h.String()].Children
res := make(dataUsageHashMap, len(ch))
for k := range ch {
res[k] = struct{}{}
}
return res
}
// Returns nil if not found.
func (d *dataUsageCache) subCache(path string) dataUsageCache {
dst := dataUsageCache{Info: dataUsageCacheInfo{
Name: path,
LastUpdate: d.Info.LastUpdate,
BloomFilter: d.Info.BloomFilter,
}}
dst.copyWithChildren(d, dataUsageHash(hashPath(path).Key()), nil)
return dst
}
func (d *dataUsageCache) deleteRecursive(h dataUsageHash) {
if existing, ok := d.Cache[h.String()]; ok {
// Delete first if there should be a loop.
delete(d.Cache, h.Key())
for child := range existing.Children {
d.deleteRecursive(dataUsageHash(child))
}
}
}
// replaceRootChild will replace the child of root in d with the root of 'other'.
func (d *dataUsageCache) replaceRootChild(other dataUsageCache) {
otherRoot := other.root()
if otherRoot == nil {
logger.LogIf(GlobalContext, errors.New("replaceRootChild: Source has no root"))
return
}
thisRoot := d.root()
if thisRoot == nil {
logger.LogIf(GlobalContext, errors.New("replaceRootChild: Root of current not found"))
return
}
thisRootHash := d.rootHash()
otherRootHash := other.rootHash()
if thisRootHash == otherRootHash {
logger.LogIf(GlobalContext, errors.New("replaceRootChild: Root of child matches root of destination"))
return
}
d.deleteRecursive(other.rootHash())
d.copyWithChildren(&other, other.rootHash(), &thisRootHash)
}
// keepBuckets will keep only the buckets specified specified by delete all others.
func (d *dataUsageCache) keepBuckets(b []BucketInfo) {
lu := make(map[dataUsageHash]struct{})
for _, v := range b {
lu[hashPath(v.Name)] = struct{}{}
}
d.keepRootChildren(lu)
}
// keepRootChildren will keep the root children specified by delete all others.
func (d *dataUsageCache) keepRootChildren(list map[dataUsageHash]struct{}) {
if d.root() == nil {
return
}
rh := d.rootHash()
for k := range d.Cache {
h := dataUsageHash(k)
if h == rh {
continue
}
if _, ok := list[h]; !ok {
delete(d.Cache, k)
d.deleteRecursive(h)
}
}
}
// dui converts the flattened version of the path to DataUsageInfo.
// As a side effect d will be flattened, use a clone if this is not ok.
func (d *dataUsageCache) dui(path string, buckets []BucketInfo) DataUsageInfo {
e := d.find(path)
if e == nil {
// No entry found, return empty.
return DataUsageInfo{}
}
flat := d.flatten(*e)
return DataUsageInfo{
LastUpdate: d.Info.LastUpdate,
ObjectsTotalCount: flat.Objects,
ObjectsTotalSize: uint64(flat.Size),
BucketsCount: uint64(len(e.Children)),
BucketsUsage: d.bucketsUsageInfo(buckets),
}
}
// replace will add or replace an entry in the cache.
// If a parent is specified it will be added to that if not already there.
// If the parent does not exist, it will be added.
func (d *dataUsageCache) replace(path, parent string, e dataUsageEntry) {
hash := hashPath(path)
if d.Cache == nil {
d.Cache = make(map[string]dataUsageEntry, 100)
}
d.Cache[hash.Key()] = e
if parent != "" {
phash := hashPath(parent)
p := d.Cache[phash.Key()]
p.addChild(hash)
d.Cache[phash.Key()] = p
}
}
// replaceHashed add or replaces an entry to the cache based on its hash.
// If a parent is specified it will be added to that if not already there.
// If the parent does not exist, it will be added.
func (d *dataUsageCache) replaceHashed(hash dataUsageHash, parent *dataUsageHash, e dataUsageEntry) {
if d.Cache == nil {
d.Cache = make(map[string]dataUsageEntry, 100)
}
d.Cache[hash.Key()] = e
if parent != nil {
p := d.Cache[parent.Key()]
p.addChild(hash)
d.Cache[parent.Key()] = p
}
}
// copyWithChildren will copy entry with hash from src if it exists along with any children.
// If a parent is specified it will be added to that if not already there.
// If the parent does not exist, it will be added.
func (d *dataUsageCache) copyWithChildren(src *dataUsageCache, hash dataUsageHash, parent *dataUsageHash) {
if d.Cache == nil {
d.Cache = make(ma
10BC8
p[string]dataUsageEntry, 100)
}
e, ok := src.Cache[hash.String()]
if !ok {
return
}
d.Cache[hash.Key()] = e
for ch := range e.Children {
if ch == hash.Key() {
logger.LogIf(GlobalContext, errors.New("dataUsageCache.copyWithChildren: Circular reference"))
return
}
d.copyWithChildren(src, dataUsageHash(ch), &hash)
}
if parent != nil {
p := d.Cache[parent.Key()]
p.addChild(hash)
d.Cache[parent.Key()] = p
}
}
// StringAll returns a detailed string representation of all entries in the cache.
func (d *dataUsageCache) StringAll() string {
s := fmt.Sprintf("info:%+v\n", d.Info)
for k, v := range d.Cache {
s += fmt.Sprintf("\t%v: %+v\n", k, v)
}
return strings.TrimSpace(s)
}
// String returns a human readable representation of the string.
func (h dataUsageHash) String() string {
return string(h)
}
// String returns a human readable representation of the string.
func (h dataUsageHash) Key() string {
return string(h)
}
// flatten all children of the root into the root element and return it.
func (d *dataUsageCache) flatten(root dataUsageEntry) dataUsageEntry {
for id := range root.Children {
e := d.Cache[id]
if len(e.Children) > 0 {
e = d.flatten(e)
}
root.merge(e)
}
root.Children = nil
return root
}
// add a size to the histogram.
func (h *sizeHistogram) add(size int64) {
// Fetch the histogram interval corresponding
// to the passed object size.
for i, interval := range ObjectsHistogramIntervals {
if size >= interval.start && size <= interval.end {
h[i]++
break
}
}
}
// toMap returns the map to a map[string]uint64.
func (h *sizeHistogram) toMap() map[string]uint64 {
res := make(map[string]uint64, dataUsageBucketLen)
for i, count := range h {
res[ObjectsHistogramIntervals[i].name] = count
}
return res
}
// bucketsUsageInfo returns the buckets usage info as a map, with
// key as bucket name
func (d *dataUsageCache) bucketsUsageInfo(buckets []BucketInfo) map[string]BucketUsageInfo {
var dst = make(map[string]BucketUsageInfo, len(buckets))
for _, bucket := range buckets {
e := d.find(bucket.Name)
if e == nil {
continue
}
flat := d.flatten(*e)
dst[bucket.Name] = BucketUsageInfo{
Size: uint64(flat.Size),
ObjectsCount: flat.Objects,
ObjectSizesHistogram: flat.ObjSizes.toMap(),
}
}
return dst
}
// bucketUsageInfo returns the buckets usage info.
// If not found all values returned are zero values.
func (d *dataUsageCache) bucketUsageInfo(bucket string) BucketUsageInfo {
e := d.find(bucket)
if e == nil {
return BucketUsageInfo{}
}
flat := d.flatten(*e)
return BucketUsageInfo{
Size: uint64(flat.Size),
ObjectsCount: flat.Objects,
ObjectSizesHistogram: flat.ObjSizes.toMap(),
}
}
// sizeRecursive returns the path as a flattened entry.
func (d *dataUsageCache) sizeRecursive(path string) *dataUsageEntry {
root := d.find(path)
if root == nil || len(root.Children) == 0 {
return root
}
flat := d.flatten(*root)
return &flat
}
// root returns the root of the cache.
func (d *dataUsageCache) root() *dataUsageEntry {
return d.find(d.Info.Name)
}
// rootHash returns the root of the cache.
func (d *dataUsageCache) rootHash() dataUsageHash {
return hashPath(d.Info.Name)
}
// clone returns a copy of the cache with no references to the existing.
func (d *dataUsageCache) clone() dataUsageCache {
clone := dataUsageCache{
Info: d.Info,
Cache: make(map[string]dataUsageEntry, len(d.Cache)),
}
for k, v := range d.Cache {
clone.Cache[k] = v
}
return clone
}
// merge root of other into d.
// children of root will be flattened before being merged.
// Last update time will be set to the last updated.
func (d *dataUsageCache) merge(other dataUsageCache) {
existingRoot := d.root()
otherRoot := other.root()
if existingRoot == nil && otherRoot == nil {
return
}
if otherRoot == nil {
return
}
if existingRoot == nil {
*d = other.clone()
return
}
if other.Info.LastUpdate.After(d.Info.LastUpdate) {
d.Info.LastUpdate = other.Info.LastUpdate
}
existingRoot.merge(*otherRoot)
eHash := d.rootHash()
for key := range otherRoot.Children {
entry := other.Cache[key]
flat := other.flatten(entry)
existing := d.Cache[key]
// If not found, merging simply adds.
existing.merge(flat)
d.replaceHashed(dataUsageHash(key), &eHash, existing)
}
}
type objectIO interface {
GetObject(ctx context.Context, bucket, object string, startOffset int64, length int64, writer io.Writer, etag string, opts ObjectOptions) (err error)
PutObject(ctx context.Context, bucket, object string, data *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, err error)
}
// load the cache content with name from minioMetaBackgroundOpsBucket.
// Only backend errors are returned as errors.
// If the object is not found or unable to deserialize d is cleared and nil error is returned.
func (d *dataUsageCache) load(ctx context.Context, store objectIO, name string) error {
var buf bytes.Buffer
err := store.GetObject(ctx, dataUsageBucket, name, 0, -1, &buf, "", ObjectOptions{})
if err != nil {
switch err.(type) {
case ObjectNotFound:
case BucketNotFound:
case InsufficientReadQuorum:
default:
return toObjectErr(err, dataUsageBucket, name)
}
*d = dataUsageCache{}
return nil
}
err = d.deserialize(&buf)
if err != nil {
*d = dataUsageCache{}
logger.LogIf(ctx, err)
}
return nil
}
// save the content of the cache to minioMetaBackgroundOpsBucket with the provided name.
func (d *dataUsageCache) save(ctx context.Context, store objectIO, name string) error {
b := d.serialize()
size := int64(len(b))
r, err := hash.NewReader(bytes.NewReader(b), size, "", "", size, false)
if err != nil {
return err
}
_, err = store.PutObject(ctx,
dataUsageBucket,
name,
NewPutObjReader(r, nil, nil),
ObjectOptions{})
if isErrBucketNotFound(err) {
return nil
}
return err
}
// dataUsageCacheVer indicates the cache version.
// Bumping the cache version will drop data from previous versions
// and write new data with the new version.
const dataUsageCacheVer = 2
// serialize the contents of the cache.
func (d *dataUsageCache) serialize() []byte {
// Prepend version and compress.
dst := make([]byte, 0, d.Msgsize()+1)
dst = append(dst, dataUsageCacheVer)
buf := bytes.NewBuffer(dst)
enc, err := zstd.NewWriter(buf,
zstd.WithEncoderLevel(zstd.SpeedFastest),
zstd.WithWindowSize(1<<20),
zstd.WithEncoderConcurrency(2))
if err != nil {
logger.LogIf(GlobalContext, err)
return nil
}
mEnc := msgp.NewWriter(enc)
err = d.EncodeMsg(mEnc)
if err != nil {
logger.LogIf(GlobalContext, err)
return nil
}
mEnc.Flush()
err = enc.Close()
if err != nil {
logger.LogIf(GlobalContext, err)
return nil
}
return buf.Bytes()
}
// deserialize the supplied byte slice into the cache.
func (d *dataUsageCache) deserialize(r io.Reader) error {
var b [1]byte
n, _ := r.Read(b[:])
if n != 1 {
return io.ErrUnexpectedEOF
}
switch b[0] {
case 1:
return errors.New("cache version deprecated (will autoupdate)")
case dataUsageCacheVer:
default:
return fmt.Errorf("dataUsageCache: unknown version: %d", int(b[0]))
}
// Zstd compressed.
dec, err := zstd.NewReader(r, zstd.WithDecoderConcurrency(2))
if err != nil {
return err
}
defer dec.Close()
return d.DecodeMsg(msgp.NewReader(dec))
}
// Trim this from start+end of hashes.
var hashPathCutSet = dataUsageRoot
func init() {
if dataUsageRoot != string(filepath.Separator) {
hashPathCutSet = dataUsageRoot + string(filepath.Separator)
}
}
// hashPath calculates a hash of the provided string.
func hashPath(data string) dataUsageHash {
if data != dataUsageRoot {
data = strings.Trim(data, hashPathCutSet)
}
return dataUsageHash(path.Clean(data))
}
//msgp:ignore dataUsageHashMap
type dataUsageHashMap map[string]struct{}
// DecodeMsg implements msgp.Decodable
func (z *dataUsageHashMap) DecodeMsg(dc *msgp.Reader) (err error) {
var zb0002 uint32
zb0002, err = dc.ReadArrayHeader()
if err != nil {
err = msgp.WrapError(err)
return
}
*z = make(dataUsageHashMap, zb0002)
for i := uint32(0); i < zb0002; i++ {
{
var zb0003 string
zb0003, err = dc.ReadString()
if err != nil {
err = msgp.WrapError(err)
return
}
(*z)[zb0003] = struct{}{}
}
}
return
}
// EncodeMsg implements msgp.Encodable
func (z dataUsageHashMap) EncodeMsg(en *msgp.Writer) (err error) {
err = en.WriteArrayHeader(uint32(len(z)))
if err != nil {
err = msgp.WrapError(err)
return
}
for zb0004 := range z {
err = en.WriteString(zb0004)
if err != nil {
err = msgp.WrapError(err, zb0004)
return
}
}
return
}
// MarshalMsg implements msgp.Marshaler
func (z dataUsageHashMap) MarshalMsg(b []byte) (o []byte, err error) {
o = msgp.Require(b, z.Msgsize())
o = msgp.AppendArrayHeader(o, uint32(len(z)))
for zb0004 := range z {
o = msgp.AppendString(o, zb0004)
}
return
}
// UnmarshalMsg implements msgp.Unmarshaler
func (z *dataUsageHashMap) UnmarshalMsg(bts []byte) (o []byte, err error) {
var zb0002 uint32
zb0002, bts, err = msgp.ReadArrayHeaderBytes(bts)
if err != nil {
err = msgp.WrapError(err)
return
}
*z = make(dataUsageHashMap, zb0002)
for i := uint32(0); i < zb0002; i++ {
{
var zb0003 string
zb0003, bts, err = msgp.ReadStringBytes(bts)
if err != nil {
err = msgp.WrapError(err)
return
}
(*z)[zb0003] = struct{}{}
}
}
o = bts
return
}
// Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
func (z dataUsageHashMap) Msgsize() (s int) {
s = msgp.ArrayHeaderSize
for zb0004 := range z {
s += msgp.StringPrefixSize + len(zb0004)
}
return
}