mirror of
https://github.com/octoleo/restic.git
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df2c03a6a4
When looking up a blob in the master index, with several indexes present in the master index, a significant amount of time is spent generating errors for each failed lookup. However, these errors are often used to check if a blob is present, but the contents are not inspected making the overhead of the error not useful. Instead, change Index.Lookup (and Index.LookupSize) to instead return a boolean denoting if the blob was found instead of an error. Also change all the calls to these functions to handle the new function signature. benchmark old ns/op new ns/op delta BenchmarkMasterIndexLookupSingleIndex-6 820 897 +9.39% BenchmarkMasterIndexLookupMultipleIndex-6 12821 2001 -84.39% BenchmarkMasterIndexLookupSingleIndexUnknown-6 5378 492 -90.85% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 17026 1649 -90.31% benchmark old allocs new allocs delta BenchmarkMasterIndexLookupSingleIndex-6 9 9 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 59 19 -67.80% BenchmarkMasterIndexLookupSingleIndexUnknown-6 22 6 -72.73% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 72 16 -77.78% benchmark old bytes new bytes delta BenchmarkMasterIndexLookupSingleIndex-6 160 160 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 3200 240 -92.50% BenchmarkMasterIndexLookupSingleIndexUnknown-6 1232 48 -96.10% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 4272 128 -97.00%
493 lines
12 KiB
Go
493 lines
12 KiB
Go
package repository_test
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import (
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"bytes"
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"math/rand"
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"testing"
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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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func TestIndexSerialize(t *testing.T) {
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type testEntry struct {
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id restic.ID
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pack restic.ID
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tpe restic.BlobType
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offset, length uint
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}
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tests := []testEntry{}
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idx := repository.NewIndex()
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// create 50 packs with 20 blobs each
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for i := 0; i < 50; i++ {
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packID := restic.NewRandomID()
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pos := uint(0)
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for j := 0; j < 20; j++ {
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id := restic.NewRandomID()
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length := uint(i*100 + j)
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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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ID: id,
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Offset: pos,
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Length: length,
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},
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PackID: packID,
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})
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tests = append(tests, testEntry{
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id: id,
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pack: packID,
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tpe: restic.DataBlob,
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offset: pos,
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length: length,
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})
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pos += length
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}
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}
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wr := bytes.NewBuffer(nil)
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err := idx.Encode(wr)
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rtest.OK(t, err)
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idx2, err := repository.DecodeIndex(wr.Bytes())
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rtest.OK(t, err)
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rtest.Assert(t, idx2 != nil,
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"nil returned for decoded index")
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wr2 := bytes.NewBuffer(nil)
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err = idx2.Encode(wr2)
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rtest.OK(t, err)
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for _, testBlob := range tests {
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list, found := idx.Lookup(testBlob.id, testBlob.tpe)
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rtest.Assert(t, found, "Expected to find blob id %v", testBlob.id.Str())
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list), list)
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}
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result := list[0]
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rtest.Equals(t, testBlob.pack, result.PackID)
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rtest.Equals(t, testBlob.tpe, result.Type)
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rtest.Equals(t, testBlob.offset, result.Offset)
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rtest.Equals(t, testBlob.length, result.Length)
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list2, found := idx2.Lookup(testBlob.id, testBlob.tpe)
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rtest.Assert(t, found, "Expected to find blob id %v", testBlob.id)
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if len(list2) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list2), list2)
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}
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result2 := list2[0]
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rtest.Equals(t, testBlob.pack, result2.PackID)
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rtest.Equals(t, testBlob.tpe, result2.Type)
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rtest.Equals(t, testBlob.offset, result2.Offset)
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rtest.Equals(t, testBlob.length, result2.Length)
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}
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// add more blobs to idx
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newtests := []testEntry{}
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for i := 0; i < 10; i++ {
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packID := restic.NewRandomID()
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pos := uint(0)
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for j := 0; j < 10; j++ {
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id := restic.NewRandomID()
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length := uint(i*100 + j)
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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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ID: id,
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Offset: pos,
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Length: length,
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},
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PackID: packID,
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})
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newtests = append(newtests, testEntry{
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id: id,
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pack: packID,
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tpe: restic.DataBlob,
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offset: pos,
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length: length,
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})
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pos += length
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}
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}
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// serialize idx, unserialize to idx3
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wr3 := bytes.NewBuffer(nil)
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err = idx.Finalize(wr3)
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rtest.OK(t, err)
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rtest.Assert(t, idx.Final(),
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"index not final after encoding")
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id := restic.NewRandomID()
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rtest.OK(t, idx.SetID(id))
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id2, err := idx.ID()
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rtest.Assert(t, id2.Equal(id),
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"wrong ID returned: want %v, got %v", id, id2)
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idx3, err := repository.DecodeIndex(wr3.Bytes())
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rtest.OK(t, err)
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rtest.Assert(t, idx3 != nil,
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"nil returned for decoded index")
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rtest.Assert(t, idx3.Final(),
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"decoded index is not final")
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// all new blobs must be in the index
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for _, testBlob := range newtests {
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list, found := idx3.Lookup(testBlob.id, testBlob.tpe)
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rtest.Assert(t, found, "Expected to find blob id %v", testBlob.id.Str())
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list), list)
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}
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blob := list[0]
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rtest.Equals(t, testBlob.pack, blob.PackID)
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rtest.Equals(t, testBlob.tpe, blob.Type)
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rtest.Equals(t, testBlob.offset, blob.Offset)
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rtest.Equals(t, testBlob.length, blob.Length)
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}
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}
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func TestIndexSize(t *testing.T) {
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idx := repository.NewIndex()
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packs := 200
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blobs := 100
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for i := 0; i < packs; i++ {
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packID := restic.NewRandomID()
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pos := uint(0)
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for j := 0; j < blobs; j++ {
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id := restic.NewRandomID()
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length := uint(i*100 + j)
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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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ID: id,
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Offset: pos,
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Length: length,
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},
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PackID: packID,
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})
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pos += length
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}
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}
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wr := bytes.NewBuffer(nil)
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err := idx.Encode(wr)
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rtest.OK(t, err)
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t.Logf("Index file size for %d blobs in %d packs is %d", blobs*packs, packs, wr.Len())
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}
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// example index serialization from doc/Design.rst
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var docExample = []byte(`
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{
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"supersedes": [
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"ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452"
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],
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"packs": [
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{
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"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
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"blobs": [
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{
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"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
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"type": "data",
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"offset": 0,
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"length": 25
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},{
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"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
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"type": "tree",
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"offset": 38,
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"length": 100
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},
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{
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"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
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"type": "data",
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"offset": 150,
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"length": 123
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}
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]
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}
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]
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}
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`)
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var docOldExample = []byte(`
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[ {
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"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
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"blobs": [
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{
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"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
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"type": "data",
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"offset": 0,
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"length": 25
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},{
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"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
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"type": "tree",
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"offset": 38,
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"length": 100
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},
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{
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"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
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"type": "data",
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"offset": 150,
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"length": 123
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}
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]
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} ]
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`)
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var exampleTests = []struct {
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id, packID restic.ID
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tpe restic.BlobType
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offset, length uint
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}{
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{
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restic.TestParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"),
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restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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restic.DataBlob, 0, 25,
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}, {
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restic.TestParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"),
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restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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restic.TreeBlob, 38, 100,
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}, {
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restic.TestParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"),
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restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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restic.DataBlob, 150, 123,
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},
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}
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var exampleLookupTest = struct {
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packID restic.ID
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blobs map[restic.ID]restic.BlobType
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}{
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restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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map[restic.ID]restic.BlobType{
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restic.TestParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"): restic.DataBlob,
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restic.TestParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"): restic.TreeBlob,
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restic.TestParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"): restic.DataBlob,
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},
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}
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func TestIndexUnserialize(t *testing.T) {
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oldIdx := restic.IDs{restic.TestParseID("ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452")}
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idx, err := repository.DecodeIndex(docExample)
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rtest.OK(t, err)
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for _, test := range exampleTests {
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list, found := idx.Lookup(test.id, test.tpe)
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rtest.Assert(t, found, "Expected to find blob id %v", test.id.Str())
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", test.id.Str(), len(list), list)
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}
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blob := list[0]
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t.Logf("looking for blob %v/%v, got %v", test.tpe, test.id.Str(), blob)
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rtest.Equals(t, test.packID, blob.PackID)
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rtest.Equals(t, test.tpe, blob.Type)
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rtest.Equals(t, test.offset, blob.Offset)
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rtest.Equals(t, test.length, blob.Length)
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}
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rtest.Equals(t, oldIdx, idx.Supersedes())
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blobs := idx.ListPack(exampleLookupTest.packID)
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if len(blobs) != len(exampleLookupTest.blobs) {
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t.Fatalf("expected %d blobs in pack, got %d", len(exampleLookupTest.blobs), len(blobs))
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}
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for _, blob := range blobs {
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b, ok := exampleLookupTest.blobs[blob.ID]
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if !ok {
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t.Errorf("unexpected blob %v found", blob.ID.Str())
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}
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if blob.Type != b {
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t.Errorf("unexpected type for blob %v: want %v, got %v", blob.ID.Str(), b, blob.Type)
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}
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}
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}
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func BenchmarkDecodeIndex(b *testing.B) {
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := repository.DecodeIndex(docExample)
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rtest.OK(b, err)
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}
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}
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func TestIndexUnserializeOld(t *testing.T) {
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idx, err := repository.DecodeOldIndex(docOldExample)
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rtest.OK(t, err)
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for _, test := range exampleTests {
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list, found := idx.Lookup(test.id, test.tpe)
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rtest.Assert(t, found, "Expected to find blob id %v", test.id.Str())
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", test.id.Str(), len(list), list)
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}
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blob := list[0]
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rtest.Equals(t, test.packID, blob.PackID)
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rtest.Equals(t, test.tpe, blob.Type)
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rtest.Equals(t, test.offset, blob.Offset)
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rtest.Equals(t, test.length, blob.Length)
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}
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rtest.Equals(t, 0, len(idx.Supersedes()))
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}
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func TestIndexPacks(t *testing.T) {
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idx := repository.NewIndex()
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packs := restic.NewIDSet()
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for i := 0; i < 20; i++ {
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packID := restic.NewRandomID()
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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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ID: restic.NewRandomID(),
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Offset: 0,
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Length: 23,
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},
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PackID: packID,
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})
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packs.Insert(packID)
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}
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idxPacks := idx.Packs()
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rtest.Assert(t, packs.Equals(idxPacks), "packs in index do not match packs added to index")
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}
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const maxPackSize = 16 * 1024 * 1024
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// This function generates a (insecure) random ID, similar to NewRandomID
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func NewRandomTestID(rng *rand.Rand) restic.ID {
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id := restic.ID{}
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rng.Read(id[:])
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return id
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}
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func createRandomIndex(rng *rand.Rand) (idx *repository.Index, lookupID restic.ID) {
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idx = repository.NewIndex()
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// create index with 200k pack files
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for i := 0; i < 200000; i++ {
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packID := NewRandomTestID(rng)
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offset := 0
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for offset < maxPackSize {
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size := 2000 + rand.Intn(4*1024*1024)
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id := NewRandomTestID(rng)
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idx.Store(restic.PackedBlob{
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PackID: packID,
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Blob: restic.Blob{
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Type: restic.DataBlob,
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ID: id,
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Length: uint(size),
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Offset: uint(offset),
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},
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})
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offset += size
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if rand.Float32() < 0.001 && lookupID.IsNull() {
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lookupID = id
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}
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}
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}
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return idx, lookupID
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}
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func BenchmarkIndexHasUnknown(b *testing.B) {
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idx, _ := createRandomIndex(rand.New(rand.NewSource(0)))
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lookupID := restic.NewRandomID()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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idx.Has(lookupID, restic.DataBlob)
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}
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}
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func BenchmarkIndexHasKnown(b *testing.B) {
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idx, lookupID := createRandomIndex(rand.New(rand.NewSource(0)))
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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idx.Has(lookupID, restic.DataBlob)
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}
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}
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func TestIndexHas(t *testing.T) {
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type testEntry struct {
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id restic.ID
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pack restic.ID
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tpe restic.BlobType
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offset, length uint
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}
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tests := []testEntry{}
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idx := repository.NewIndex()
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// create 50 packs with 20 blobs each
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for i := 0; i < 50; i++ {
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packID := restic.NewRandomID()
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pos := uint(0)
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for j := 0; j < 20; j++ {
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id := restic.NewRandomID()
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length := uint(i*100 + j)
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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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ID: id,
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Offset: pos,
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Length: length,
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},
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PackID: packID,
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})
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tests = append(tests, testEntry{
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id: id,
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pack: packID,
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tpe: restic.DataBlob,
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offset: pos,
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length: length,
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})
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pos += length
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}
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}
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for _, testBlob := range tests {
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|
rtest.Assert(t, idx.Has(testBlob.id, testBlob.tpe), "Index reports not having data blob added to it")
|
|
}
|
|
|
|
rtest.Assert(t, !idx.Has(restic.NewRandomID(), restic.DataBlob), "Index reports having a data blob not added to it")
|
|
rtest.Assert(t, !idx.Has(tests[0].id, restic.TreeBlob), "Index reports having a tree blob added to it with the same id as a data blob")
|
|
}
|