-
Notifications
You must be signed in to change notification settings - Fork 0
/
db_test.go
654 lines (575 loc) · 15 KB
/
db_test.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
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
642
643
644
645
646
647
648
649
650
651
652
653
654
// Copyright 2022 Molecula Corp. (DBA FeatureBase).
// SPDX-License-Identifier: Apache-2.0
package rbf_test
import (
"bytes"
"context"
"errors"
"fmt"
"math/rand"
"net"
"net/http"
"os"
"reflect"
"testing"
"time"
_ "net/http/pprof"
"github.com/felixge/fgprof"
"github.com/gernest/rbf"
rbfcfg "github.com/gernest/rbf/cfg"
"golang.org/x/sync/errgroup"
)
func TestDB_Open(t *testing.T) {
db := NewDB(t)
if err := db.Open(); err != nil {
t.Fatal(err)
} else if err := db.Close(); err != nil {
t.Fatal(err)
}
}
func TestDB_WAL(t *testing.T) {
t.Run("ErrTxTooLarge", func(t *testing.T) {
config := rbfcfg.NewDefaultConfig()
config.MaxWALSize = 4 * rbf.PageSize
db := MustOpenDB(t, config)
defer MustCloseDB(t, db)
tx := MustBegin(t, db, true)
defer tx.Rollback()
if err := tx.CreateBitmap("x"); err != nil {
t.Fatal(err)
} else if err := tx.CreateBitmap("y"); err != rbf.ErrTxTooLarge {
t.Fatalf("unexpected error: %v", err)
}
})
t.Run("ErrTxTooLargeWithBitmap", func(t *testing.T) {
config := rbfcfg.NewDefaultConfig()
config.MaxWALSize = 5 * rbf.PageSize
db := MustOpenDB(t, config)
defer MustCloseDB(t, db)
tx := MustBegin(t, db, true)
defer tx.Rollback()
if err := tx.CreateBitmap("x"); err != nil {
t.Fatal(err)
}
// Fill array until it has the maximum number of elements.
for i := uint64(0); i < rbf.ArrayMaxSize; i++ {
if _, err := tx.Add("x", i); err != nil {
t.Fatal(err)
}
}
// Issuing one more item to a full array should convert it to a bitmap
// page and cause the write to return "tx too large". Previous to the
// FB-828 fix, this would write past the mmap size so it was inaccessible.
if _, err := tx.Add("x", rbf.ArrayMaxSize); err == nil || !errors.Is(err, rbf.ErrTxTooLarge) {
t.Fatalf("unexpected error: %#v", err)
}
})
t.Run("Halt", func(t *testing.T) {
if testing.Short() {
t.Skip("-short enabled, skipping")
}
config := rbfcfg.NewDefaultConfig()
config.MaxWALSize = 16 * rbf.PageSize
config.MaxWALCheckpointSize = 8 * rbf.PageSize
config.MinWALCheckpointSize = 4 * rbf.PageSize
db := MustOpenDB(t, config)
defer MustCloseDB(t, db)
// Continuously run read overlapping transactions.
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
for i := 0; i < 10; i++ {
i := i
g.Go(func() error {
time.Sleep(time.Duration(i) * 10 * time.Millisecond) // stagger
for {
if err := ctx.Err(); err != nil {
return nil
}
if err := func() error {
tx, err := db.Begin(false)
if err != nil {
return err
}
defer tx.Rollback()
time.Sleep(20 * time.Millisecond)
return nil
}(); err != nil {
return err
}
}
})
}
// Generate updates to the DB/WAL.
for i := 0; i < 100; i++ {
func() {
tx := MustBegin(t, db, true)
defer tx.Rollback()
if err := tx.CreateBitmapIfNotExists("x"); err != nil {
t.Fatal(err)
} else if _, err := tx.Add("x", uint64(i)); err != nil {
t.Fatal(err)
} else if err := tx.Commit(); err != nil {
t.Fatal(err)
}
}()
}
// Stop read transactions & wait.
cancel()
if err := g.Wait(); err != nil {
t.Fatal(err)
}
})
// initially this is just a cut and paste of the Halt test, except that
// we close the DB while the reads are still running.
t.Run("Close", func(t *testing.T) {
if testing.Short() {
t.Skip("-short enabled, skipping")
}
config := rbfcfg.NewDefaultConfig()
config.MaxWALSize = 16 * rbf.PageSize
config.MaxWALCheckpointSize = 8 * rbf.PageSize
config.MinWALCheckpointSize = 4 * rbf.PageSize
db := MustOpenDB(t, config)
// Continuously run read overlapping transactions.
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
for i := 0; i < 10; i++ {
i := i
g.Go(func() error {
time.Sleep(time.Duration(i) * 10 * time.Millisecond) // stagger
for {
if err := ctx.Err(); err != nil {
return nil
}
if err := func() error {
tx, err := db.Begin(false)
if err != nil {
return err
}
// give the db time to close between when we opened and
// when we run the Container call
time.Sleep(10 * time.Millisecond)
_, err = tx.Container("x", 0)
if err != nil {
t.Fatalf("requesting container: %v", err)
}
defer tx.Rollback()
return nil
}(); err != nil {
// it's okay to ErrClosed, because we plan to close
// the database out from under us.
if err != rbf.ErrClosed {
return err
} else {
return nil
}
}
}
})
}
// Generate updates to the DB/WAL.
for i := 0; i < 100; i++ {
func() {
tx := MustBegin(t, db, true)
defer tx.Rollback()
if err := tx.CreateBitmapIfNotExists("x"); err != nil {
t.Fatal(err)
} else if _, err := tx.Add("x", uint64(i)); err != nil {
t.Fatal(err)
} else if err := tx.Commit(); err != nil {
t.Fatal(err)
}
time.Sleep(1 * time.Millisecond)
}()
}
// close the db now.
err := db.Close()
if err != nil {
t.Fatalf("closing db: %v", err)
}
// delay a bit to let some readers try to read
time.Sleep(20 * time.Millisecond)
// Stop read transactions & wait.
cancel()
if err := g.Wait(); err != nil {
t.Fatal(err)
}
})
}
func TestDB_Recovery(t *testing.T) {
// Ensure a bitmap header written without a bitmap is truncated.
t.Run("TruncPartialWALBitmap", func(t *testing.T) {
db := MustOpenDB(t)
defer MustCloseDB(t, db)
a := make([]uint64, rbf.ArrayMaxSize+100)
for i := range a {
a[i] = uint64(i)
}
// Create bitmap & generate enough values to create a bitmap container.
if tx, err := db.Begin(true); err != nil {
t.Fatal(err)
} else if err := tx.CreateBitmap("x"); err != nil {
t.Fatal(err)
} else if _, err := tx.Add("x", a...); err != nil {
t.Fatal(err)
} else if err := tx.Commit(); err != nil {
t.Fatal(err)
}
// Add one additional bit in a second transaction.
tx0, err := db.Begin(true)
if err != nil {
t.Fatal(err)
} else if _, err := tx0.Add("x", uint64(len(a))); err != nil {
t.Fatal(err)
}
// Start a read-only transaction so the write tx does not checkpoint the WAL.
tx1, err := db.Begin(false)
if err != nil {
t.Fatal(err)
}
// Commit write transaction.
if err := tx0.Commit(); err != nil {
t.Fatal(err)
}
tx1.Rollback()
// Close database & truncate WAL to remove commit page & bitmap data page.
walPath, walSize := db.WALPath(), db.WALSize()
if err := db.Close(); err != nil {
t.Fatal(err)
} else if err := os.Truncate(walPath, walSize-(2*rbf.PageSize)); err != nil {
t.Fatal(err)
}
// Reopen database.
newDB := rbf.NewDB(db.Path, nil)
if err := newDB.Open(); err != nil {
t.Fatal(err)
}
defer MustCloseDB(t, newDB)
// Verify last insert was not added.
tx, err := newDB.Begin(true)
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
if exists, err := tx.Contains("x", uint64(len(a))); exists || err != nil {
t.Fatalf("Contains()=<%v,%#v>", exists, err)
} else if exists, err := tx.Contains("x", uint64(len(a)-1)); !exists || err != nil {
t.Fatalf("Contains()=<%v,%#v>", exists, err)
}
tx.Rollback()
})
}
func TestDB_HasData(t *testing.T) {
db := MustOpenDB(t)
defer MustCloseDB(t, db)
// HasData should start out false.
const requireOneHotBit = true
hasAnything, err := db.HasData(!requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if hasAnything {
t.Fatalf("HasData reported existing data on an empty database")
}
hasAnything, err = db.HasData(requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if hasAnything {
t.Fatalf("HasData reported existing data on an empty database")
}
// check that HasData sees a committed record.
// Create bitmap with no hot bits.
if tx, err := db.Begin(true); err != nil {
t.Fatal(err)
} else if err := tx.CreateBitmap("x"); err != nil {
t.Fatal(err)
} else if err := tx.Commit(); err != nil {
t.Fatal(err)
}
// HasData(false) should now report seeing the 'x' record, even though
// the value is an empty bitmap, since !requireOneHotBit.
hasAnything, err = db.HasData(!requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if !hasAnything {
t.Fatalf("HasData(!requireOneHotBit) reported no data on a database that has 'x' written to it")
}
// HasData(requireOneHotBit) should report false, since we have no hot bits.
hasAnything, err = db.HasData(requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if hasAnything {
t.Fatalf("HasData(requireOneHotBit) reported data on a database that has 'x' -> empty bitmap")
}
// hot up a bit.
if tx, err := db.Begin(true); err != nil {
t.Fatal(err)
} else if _, err := tx.Add("x", rand.Uint64()); err != nil {
t.Fatal(err)
} else if err := tx.Commit(); err != nil {
t.Fatal(err)
}
// Now it shouldn't matter, we should get HasData true either way
// HasData(requireOneHotBit) should report false, since we have no hot bits.
hasAnything, err = db.HasData(requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if !hasAnything {
t.Fatalf("HasData should have seen the hot bit")
}
hasAnything, err = db.HasData(!requireOneHotBit)
if err != nil {
t.Fatal(err)
}
if !hasAnything {
t.Fatalf("HasData should have seen the hot bit")
}
}
// Ensures the DB can continuously write while readers are executing.
func TestDB_MultiTx(t *testing.T) {
if testing.Short() {
t.Skip("-short enabled, skipping")
}
cfg := rbfcfg.NewDefaultConfig()
db := MustOpenDB(t, cfg)
defer MustCloseDB(t, db)
// Run multiple readers in separate goroutines.
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
for i := 0; i < 4; i++ {
g.Go(func() error {
for {
if ctx.Err() != nil {
return nil // cancelled, return no error
} else if err := func() error {
tx, err := db.Begin(false)
if err != nil {
return err
}
defer tx.Rollback()
time.Sleep(time.Duration(rand.Intn(100)) * time.Millisecond)
n := rand.Intn(500) + 500
for i := 0; i < n; i++ {
v := rand.Intn(1 << 20)
if _, err := tx.Contains("x", uint64(v)); err != nil {
return err
}
}
return nil
}(); err != nil {
return err
}
time.Sleep(time.Duration(rand.Intn(int(100 * time.Millisecond))))
}
})
}
// Continuously set/clear bits while readers are executing.
for i := 0; i < 100; i++ {
func() {
tx, err := db.Begin(true)
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
n := rand.Intn(90) + 10
for j := 0; j < n; j++ {
v := rand.Intn(1 << 20)
if _, err := tx.Add("x", uint64(v)); err != nil {
t.Fatal(err)
}
}
if err := tx.Commit(); err != nil {
t.Fatal(err)
}
}()
}
// Stop readers & wait.
cancel()
if err := g.Wait(); err != nil {
t.Fatal(err)
}
}
func TestDB_DebugInfo(t *testing.T) {
db := MustOpenDB(t)
defer MustCloseDB(t, db)
tx := MustBegin(t, db, true)
defer tx.Rollback()
info := db.DebugInfo()
if got, want := info.Path, db.Path; got != want {
t.Fatalf("Path=%q, want %q", got, want)
} else if got, want := len(info.Txs), 1; got != want {
t.Fatalf("len(Txs)=%d, want %d", got, want)
}
}
// premake pool of random values
const randPool = (1 << 18)
// benchmarkOneCheckpoint
func benchmarkOneCheckpoint(b *testing.B, randInts []int) {
cfg := rbfcfg.NewDefaultConfig()
// extremely low to force checkpointing
cfg.MinWALCheckpointSize = rbf.PageSize * 16
cfg.MaxWALCheckpointSize = rbf.PageSize * 64
var _ rbfcfg.Config
db := MustOpenDB(b, cfg)
defer MustCloseDB(b, db)
// Run multiple readers in separate goroutines.
ctx, cancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
for i := 0; i < 8; i++ {
i := i
g.Go(func() error {
for {
if ctx.Err() != nil {
return nil // cancelled, return no error
} else if err := func() error {
tx, err := db.Begin(false)
if err != nil {
return err
}
defer tx.Rollback()
time.Sleep(time.Duration(rand.Intn(int(3 * time.Millisecond))))
times := rand.Intn(1000) + 1
for j := 0; j < times; j++ {
v := randInts[((i<<10)+j)%(randPool-1)]
if _, err := tx.Contains("x", uint64(v)); err != nil {
return err
}
}
return nil
}(); err != nil {
return err
}
// time.Sleep(time.Duration(rand.Intn(int(3 * time.Millisecond))))
}
})
}
// Continuously set/clear bits while readers are executing.
next := 0
for i := 0; i < 1000; i++ {
func() {
tx, err := db.Begin(true)
if err != nil {
b.Fatal(err)
}
defer tx.Rollback()
times := rand.Intn(100)
for j := 0; j < times; j++ {
v := randInts[next]
next = (next + 1) % (randPool - 1)
if j&7 == 0 {
// some removes but they're less frequent
if _, err := tx.Remove("x", uint64(v)); err != nil {
b.Fatal(err)
}
} else {
if _, err := tx.Add("x", uint64(v)); err != nil {
b.Fatal(err)
}
}
}
if err := tx.Commit(); err != nil {
b.Fatal(err)
}
}()
}
// Stop readers & wait.
cancel()
if err := g.Wait(); err != nil {
b.Fatal(err)
}
}
func BenchmarkDbCheckpoint(b *testing.B) {
out, err := os.Create("cp.out")
if err != nil {
b.Fatalf("creating log file: %v", err)
}
done := fgprof.Start(out, fgprof.FormatPprof)
b.StopTimer()
// premake these because otherwise it's >5% of CPU in the reads
randInts := make([]int, randPool)
for i := range randInts {
v1, v2 := rand.Intn(1<<24), rand.Intn(1<<24)
// minimum gives us a skewed distribution which makes lower values more
// likely than higher values, so we get a mix of container types
if v1 < v2 {
randInts[i] = v1
} else {
randInts[i] = v2
}
}
b.StartTimer()
for i := 0; i < b.N; i++ {
benchmarkOneCheckpoint(b, randInts)
}
b.StopTimer()
_ = done()
}
// better diagnosis of deadlocks/hung situations versus just really slow "Quick" tests.
func TestMain(m *testing.M) {
l, err := net.Listen("tcp", "localhost:0")
if err != nil {
panic(err)
}
port := l.Addr().(*net.TCPAddr).Port
fmt.Printf("rbf/ TestMain: online stack-traces: curl http://localhost:%v/debug/pprof/goroutine?debug=2\n", port)
go func() {
err := http.Serve(l, nil)
if err != nil {
panic(err)
}
}()
os.Exit(m.Run())
}
func TestDB_Backup(t *testing.T) {
db := MustOpenDB(t)
defer db.Close()
tx, err := db.Begin(true)
if err != nil {
t.Fatal(err)
}
_, err = tx.Add("backup", 1, 2, 3)
if err != nil {
t.Fatal(err)
}
err = tx.Commit()
if err != nil {
t.Fatal(err)
}
var b bytes.Buffer
err = db.Backup(&b)
if err != nil {
t.Fatal(err)
}
dbPath := t.TempDir()
err = rbf.Restore(&b, dbPath)
if err != nil {
t.Fatal(err)
}
db2 := rbf.NewDB(dbPath, nil)
err = db2.Open()
if err != nil {
t.Fatal(err)
}
defer db2.Close()
if db2.Path == db.Path {
t.Fatal("opened same database")
}
tx, err = db2.Begin(false)
if err != nil {
t.Fatal(err)
}
defer tx.Rollback()
r, err := tx.RoaringBitmap("backup")
if err != nil {
t.Fatal(err)
}
want := []uint64{1, 2, 3}
got := r.Slice()
if !reflect.DeepEqual(want, got) {
t.Fatalf("want %v got %v", want, got)
}
}