package restic_test import ( "bytes" "flag" "io" "math/rand" "testing" "github.com/restic/restic" "github.com/restic/restic/backend" "github.com/restic/restic/chunker" ) var benchArchiveDirectory = flag.String("test.benchdir", "", "benchmark archiving a real directory") func get_random(seed, count int) []byte { buf := make([]byte, count) rnd := rand.New(rand.NewSource(int64(seed))) for i := 0; i < count; i++ { buf[i] = byte(rnd.Uint32()) } return buf } func randomReader(seed, size int) *bytes.Reader { return bytes.NewReader(get_random(seed, size)) } const bufSize = chunker.MiB type Rdr interface { io.ReadSeeker io.ReaderAt } func benchmarkChunkEncrypt(b testing.TB, buf []byte, rd Rdr, key *restic.Key) { ch := restic.GetChunker("BenchmarkChunkEncrypt") rd.Seek(0, 0) ch.Reset(rd) for { chunk, err := ch.Next() if err == io.EOF { break } ok(b, err) // reduce length of buf buf = buf[:chunk.Length] n, err := io.ReadFull(chunk.Reader(rd), buf) ok(b, err) assert(b, uint(n) == chunk.Length, "invalid length: got %d, expected %d", n, chunk.Length) _, err = key.Encrypt(buf, buf) ok(b, err) } restic.FreeChunker("BenchmarkChunkEncrypt", ch) } func BenchmarkChunkEncrypt(b *testing.B) { data := get_random(23, 10<<20) // 10MiB rd := bytes.NewReader(data) be := setupBackend(b) defer teardownBackend(b, be) key := setupKey(b, be, "geheim") buf := restic.GetChunkBuf("BenchmarkChunkEncrypt") b.ResetTimer() b.SetBytes(int64(len(data))) for i := 0; i < b.N; i++ { benchmarkChunkEncrypt(b, buf, rd, key) } restic.FreeChunkBuf("BenchmarkChunkEncrypt", buf) } func benchmarkChunkEncryptP(b *testing.PB, buf []byte, rd Rdr, key *restic.Key) { ch := restic.GetChunker("BenchmarkChunkEncryptP") rd.Seek(0, 0) ch.Reset(rd) for { chunk, err := ch.Next() if err == io.EOF { break } // reduce length of chunkBuf buf = buf[:chunk.Length] io.ReadFull(chunk.Reader(rd), buf) key.Encrypt(buf, buf) } restic.FreeChunker("BenchmarkChunkEncryptP", ch) } func BenchmarkChunkEncryptParallel(b *testing.B) { be := setupBackend(b) defer teardownBackend(b, be) key := setupKey(b, be, "geheim") data := get_random(23, 10<<20) // 10MiB buf := restic.GetChunkBuf("BenchmarkChunkEncryptParallel") b.ResetTimer() b.SetBytes(int64(len(data))) b.RunParallel(func(pb *testing.PB) { for pb.Next() { rd := bytes.NewReader(data) benchmarkChunkEncryptP(pb, buf, rd, key) } }) restic.FreeChunkBuf("BenchmarkChunkEncryptParallel", buf) } func BenchmarkArchiveDirectory(b *testing.B) { if *benchArchiveDirectory == "" { b.Skip("benchdir not set, skipping BenchmarkArchiveDirectory") } be := setupBackend(b) defer teardownBackend(b, be) key := setupKey(b, be, "geheim") server := restic.NewServerWithKey(be, key) arch, err := restic.NewArchiver(server) ok(b, err) _, id, err := arch.Snapshot(nil, *benchArchiveDirectory, nil) b.Logf("snapshot archived as %v", id) } func snapshot(t testing.TB, server restic.Server, path string) *restic.Snapshot { arch, err := restic.NewArchiver(server) ok(t, err) ok(t, arch.Preload(nil)) sn, _, err := arch.Snapshot(nil, path, nil) ok(t, err) return sn } func countBlobs(t testing.TB, server restic.Server) int { blobs := 0 err := server.EachID(backend.Tree, func(id backend.ID) { tree, err := restic.LoadTree(server, id) ok(t, err) blobs += tree.Map.Len() }) ok(t, err) return blobs } func archiveWithPreload(t testing.TB) { if *benchArchiveDirectory == "" { t.Skip("benchdir not set, skipping TestArchiverPreload") } be := setupBackend(t) defer teardownBackend(t, be) key := setupKey(t, be, "geheim") server := restic.NewServerWithKey(be, key) // archive a few files sn := snapshot(t, server, *benchArchiveDirectory) t.Logf("archived snapshot %v", sn.ID()) // get archive stats blobsBefore := countBlobs(t, server) t.Logf("found %v blobs", blobsBefore) // archive the same files again sn2 := snapshot(t, server, *benchArchiveDirectory) t.Logf("archived snapshot %v", sn2.ID()) // get archive stats blobsAfter := countBlobs(t, server) t.Logf("found %v blobs", blobsAfter) // if there are more than 50% more blobs, something is wrong if blobsAfter > (blobsBefore + blobsBefore/2) { t.Fatalf("TestArchiverPreload: too many blobs in repository: before %d, after %d, threshhold %d", blobsBefore, blobsAfter, (blobsBefore + blobsBefore/2)) } } func TestArchivePreload(t *testing.T) { archiveWithPreload(t) } func BenchmarkPreload(t *testing.B) { if *benchArchiveDirectory == "" { t.Skip("benchdir not set, skipping TestArchiverPreload") } be := setupBackend(t) defer teardownBackend(t, be) key := setupKey(t, be, "geheim") server := restic.NewServerWithKey(be, key) // archive a few files arch, err := restic.NewArchiver(server) ok(t, err) sn, _, err := arch.Snapshot(nil, *benchArchiveDirectory, nil) ok(t, err) t.Logf("archived snapshot %v", sn.ID()) // start benchmark t.ResetTimer() for i := 0; i < t.N; i++ { // create new archiver and preload arch2, err := restic.NewArchiver(server) ok(t, err) ok(t, arch2.Preload(nil)) } } func BenchmarkLoadTree(t *testing.B) { if *benchArchiveDirectory == "" { t.Skip("benchdir not set, skipping TestArchiverPreload") } be := setupBackend(t) defer teardownBackend(t, be) key := setupKey(t, be, "geheim") server := restic.NewServerWithKey(be, key) // archive a few files arch, err := restic.NewArchiver(server) ok(t, err) sn, _, err := arch.Snapshot(nil, *benchArchiveDirectory, nil) ok(t, err) t.Logf("archived snapshot %v", sn.ID()) // start benchmark t.ResetTimer() list, err := server.List(backend.Tree) ok(t, err) list = list[:10] for i := 0; i < t.N; i++ { _, err := restic.LoadTree(server, list[0]) ok(t, err) } }