forked from TrueCloudLab/restic
f97a680887
BenchmarkLoad{AndDecrypt,Blob} were spending between 38% and 50% of
their time measuring SHA-256 performance in their checks.
493 lines
11 KiB
Go
493 lines
11 KiB
Go
package repository_test
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"io"
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"math/rand"
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"path/filepath"
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"testing"
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"time"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/fs"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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)
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var testSizes = []int{5, 23, 2<<18 + 23, 1 << 20}
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var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
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func TestSave(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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for _, size := range testSizes {
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.Hash(data)
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// save
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sid, err := repo.SaveBlob(context.TODO(), restic.DataBlob, data, restic.ID{})
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rtest.OK(t, err)
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rtest.Equals(t, id, sid)
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rtest.OK(t, repo.Flush(context.Background()))
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// rtest.OK(t, repo.SaveIndex())
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// read back
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, nil)
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rtest.OK(t, err)
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rtest.Equals(t, size, len(buf))
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rtest.Assert(t, len(buf) == len(data),
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"number of bytes read back does not match: expected %d, got %d",
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len(data), len(buf))
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rtest.Assert(t, bytes.Equal(buf, data),
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"data does not match: expected %02x, got %02x",
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data, buf)
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}
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}
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func TestSaveFrom(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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for _, size := range testSizes {
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.Hash(data)
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// save
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id2, err := repo.SaveBlob(context.TODO(), restic.DataBlob, data, id)
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rtest.OK(t, err)
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rtest.Equals(t, id, id2)
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rtest.OK(t, repo.Flush(context.Background()))
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// read back
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, nil)
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rtest.OK(t, err)
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rtest.Equals(t, size, len(buf))
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rtest.Assert(t, len(buf) == len(data),
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"number of bytes read back does not match: expected %d, got %d",
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len(data), len(buf))
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rtest.Assert(t, bytes.Equal(buf, data),
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"data does not match: expected %02x, got %02x",
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data, buf)
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}
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}
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func BenchmarkSaveAndEncrypt(t *testing.B) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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size := 4 << 20 // 4MiB
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.ID(sha256.Sum256(data))
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t.ReportAllocs()
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t.ResetTimer()
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t.SetBytes(int64(size))
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for i := 0; i < t.N; i++ {
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// save
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_, err = repo.SaveBlob(context.TODO(), restic.DataBlob, data, id)
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rtest.OK(t, err)
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}
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}
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func TestLoadTree(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a few files
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sn := archiver.TestSnapshot(t, repo, rtest.BenchArchiveDirectory, nil)
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rtest.OK(t, repo.Flush(context.Background()))
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_, err := repo.LoadTree(context.TODO(), *sn.Tree)
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rtest.OK(t, err)
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}
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func BenchmarkLoadTree(t *testing.B) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a few files
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sn := archiver.TestSnapshot(t, repo, rtest.BenchArchiveDirectory, nil)
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rtest.OK(t, repo.Flush(context.Background()))
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t.ResetTimer()
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for i := 0; i < t.N; i++ {
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_, err := repo.LoadTree(context.TODO(), *sn.Tree)
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rtest.OK(t, err)
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}
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}
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func TestLoadBlob(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(t, err)
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id, err := repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.ID{})
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rtest.OK(t, err)
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rtest.OK(t, repo.Flush(context.Background()))
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base := restic.CiphertextLength(length)
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for _, testlength := range []int{0, base - 20, base - 1, base, base + 7, base + 15, base + 1000} {
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buf = make([]byte, 0, testlength)
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, buf)
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if err != nil {
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t.Errorf("LoadBlob() returned an error for buffer size %v: %v", testlength, err)
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continue
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}
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if len(buf) != length {
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t.Errorf("LoadBlob() returned the wrong number of bytes: want %v, got %v", length, len(buf))
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continue
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}
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}
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}
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func BenchmarkLoadBlob(b *testing.B) {
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repo, cleanup := repository.TestRepository(b)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(b, err)
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id, err := repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.ID{})
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rtest.OK(b, err)
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rtest.OK(b, repo.Flush(context.Background()))
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b.ResetTimer()
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b.SetBytes(int64(length))
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for i := 0; i < b.N; i++ {
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var err error
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buf, err = repo.LoadBlob(context.TODO(), restic.DataBlob, id, buf)
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// Checking the SHA-256 with restic.Hash can make up 38% of the time
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// spent in this loop, so pause the timer.
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b.StopTimer()
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rtest.OK(b, err)
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if len(buf) != length {
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b.Errorf("wanted %d bytes, got %d", length, len(buf))
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}
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id2 := restic.Hash(buf)
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if !id.Equal(id2) {
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b.Errorf("wrong data returned, wanted %v, got %v", id.Str(), id2.Str())
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}
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b.StartTimer()
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}
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}
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func BenchmarkLoadAndDecrypt(b *testing.B) {
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repo, cleanup := repository.TestRepository(b)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(b, err)
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dataID := restic.Hash(buf)
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storageID, err := repo.SaveUnpacked(context.TODO(), restic.DataFile, buf)
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rtest.OK(b, err)
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// rtest.OK(b, repo.Flush())
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b.ResetTimer()
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b.SetBytes(int64(length))
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for i := 0; i < b.N; i++ {
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data, err := repo.LoadAndDecrypt(context.TODO(), nil, restic.DataFile, storageID)
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rtest.OK(b, err)
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// See comment in BenchmarkLoadBlob.
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b.StopTimer()
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if len(data) != length {
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b.Errorf("wanted %d bytes, got %d", length, len(data))
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}
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id2 := restic.Hash(data)
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if !dataID.Equal(id2) {
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b.Errorf("wrong data returned, wanted %v, got %v", storageID.Str(), id2.Str())
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}
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b.StartTimer()
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}
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}
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func TestLoadJSONUnpacked(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a snapshot
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sn := restic.Snapshot{}
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sn.Hostname = "foobar"
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sn.Username = "test!"
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id, err := repo.SaveJSONUnpacked(context.TODO(), restic.SnapshotFile, &sn)
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rtest.OK(t, err)
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var sn2 restic.Snapshot
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// restore
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err = repo.LoadJSONUnpacked(context.TODO(), restic.SnapshotFile, id, &sn2)
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rtest.OK(t, err)
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rtest.Equals(t, sn.Hostname, sn2.Hostname)
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rtest.Equals(t, sn.Username, sn2.Username)
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}
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var repoFixture = filepath.Join("testdata", "test-repo.tar.gz")
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func TestRepositoryLoadIndex(t *testing.T) {
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repodir, cleanup := rtest.Env(t, repoFixture)
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defer cleanup()
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repo := repository.TestOpenLocal(t, repodir)
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rtest.OK(t, repo.LoadIndex(context.TODO()))
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}
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func BenchmarkLoadIndex(b *testing.B) {
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repository.TestUseLowSecurityKDFParameters(b)
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repo, cleanup := repository.TestRepository(b)
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defer cleanup()
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idx := repository.NewIndex()
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for i := 0; i < 5000; i++ {
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idx.Store(restic.PackedBlob{
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Blob: restic.Blob{
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Type: restic.DataBlob,
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Length: 1234,
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ID: restic.NewRandomID(),
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Offset: 1235,
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},
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PackID: restic.NewRandomID(),
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})
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}
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id, err := repository.SaveIndex(context.TODO(), repo, idx)
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rtest.OK(b, err)
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b.Logf("index saved as %v (%v entries)", id.Str(), idx.Count(restic.DataBlob))
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fi, err := repo.Backend().Stat(context.TODO(), restic.Handle{Type: restic.IndexFile, Name: id.String()})
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rtest.OK(b, err)
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b.Logf("filesize is %v", fi.Size)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := repository.LoadIndex(context.TODO(), repo, id)
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rtest.OK(b, err)
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}
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}
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// saveRandomDataBlobs generates random data blobs and saves them to the repository.
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func saveRandomDataBlobs(t testing.TB, repo restic.Repository, num int, sizeMax int) {
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for i := 0; i < num; i++ {
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size := rand.Int() % sizeMax
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buf := make([]byte, size)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(t, err)
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_, err = repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.ID{})
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rtest.OK(t, err)
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}
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}
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func TestRepositoryIncrementalIndex(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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repository.IndexFull = func(*repository.Index) bool { return true }
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// add 15 packs
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for j := 0; j < 5; j++ {
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// add 3 packs, write intermediate index
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for i := 0; i < 3; i++ {
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saveRandomDataBlobs(t, repo, 5, 1<<15)
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rtest.OK(t, repo.Flush(context.Background()))
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}
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rtest.OK(t, repo.SaveFullIndex(context.TODO()))
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}
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// add another 5 packs
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for i := 0; i < 5; i++ {
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saveRandomDataBlobs(t, repo, 5, 1<<15)
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rtest.OK(t, repo.Flush(context.Background()))
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}
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// save final index
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rtest.OK(t, repo.SaveIndex(context.TODO()))
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packEntries := make(map[restic.ID]map[restic.ID]struct{})
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err := repo.List(context.TODO(), restic.IndexFile, func(id restic.ID, size int64) error {
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idx, err := repository.LoadIndex(context.TODO(), repo, id)
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rtest.OK(t, err)
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for pb := range idx.Each(context.TODO()) {
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if _, ok := packEntries[pb.PackID]; !ok {
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packEntries[pb.PackID] = make(map[restic.ID]struct{})
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}
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packEntries[pb.PackID][id] = struct{}{}
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}
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return nil
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})
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if err != nil {
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t.Fatal(err)
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}
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for packID, ids := range packEntries {
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if len(ids) > 1 {
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t.Errorf("pack %v listed in %d indexes\n", packID, len(ids))
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}
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}
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}
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type backend struct {
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rd io.Reader
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}
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func (be backend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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return fn(be.rd)
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}
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type retryBackend struct {
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buf []byte
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}
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func (be retryBackend) Load(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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err := fn(bytes.NewReader(be.buf[:len(be.buf)/2]))
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if err != nil {
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return err
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}
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return fn(bytes.NewReader(be.buf))
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}
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func TestDownloadAndHash(t *testing.T) {
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buf := make([]byte, 5*1024*1024+881)
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_, err := io.ReadFull(rnd, buf)
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if err != nil {
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t.Fatal(err)
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}
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var tests = []struct {
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be repository.Loader
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want []byte
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}{
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{
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be: backend{rd: bytes.NewReader(buf)},
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want: buf,
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},
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{
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be: retryBackend{buf: buf},
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want: buf,
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},
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}
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for _, test := range tests {
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t.Run("", func(t *testing.T) {
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f, id, size, err := repository.DownloadAndHash(context.TODO(), test.be, restic.Handle{})
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if err != nil {
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t.Error(err)
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}
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want := restic.Hash(test.want)
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if !want.Equal(id) {
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t.Errorf("wrong hash returned, want %v, got %v", want.Str(), id.Str())
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}
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if size != int64(len(test.want)) {
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t.Errorf("wrong size returned, want %v, got %v", test.want, size)
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}
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err = f.Close()
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if err != nil {
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t.Error(err)
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}
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err = fs.RemoveIfExists(f.Name())
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if err != nil {
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t.Fatal(err)
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}
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})
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}
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}
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type errorReader struct {
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err error
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}
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func (er errorReader) Read(p []byte) (n int, err error) {
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return 0, er.err
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}
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func TestDownloadAndHashErrors(t *testing.T) {
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var tests = []struct {
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be repository.Loader
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err string
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}{
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{
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be: backend{rd: errorReader{errors.New("test error 1")}},
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err: "test error 1",
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},
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}
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for _, test := range tests {
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t.Run("", func(t *testing.T) {
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_, _, _, err := repository.DownloadAndHash(context.TODO(), test.be, restic.Handle{})
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if err == nil {
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t.Fatalf("wanted error %q, got nil", test.err)
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}
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if errors.Cause(err).Error() != test.err {
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t.Fatalf("wanted error %q, got %q", test.err, err)
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}
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})
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}
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}
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