mirror of
https://github.com/restic/restic.git
synced 2026-06-21 16:14:18 +00:00
Michael Eischer
c062a78dcd
This removes them from the public interface. The latter now only provides the PackBlob interface, without being bound to the type used internally by the pack package.
632 lines
15 KiB
Go
632 lines
15 KiB
Go
package index_test
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import (
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"bytes"
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"context"
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"fmt"
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"math/rand"
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"sync"
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"testing"
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"github.com/restic/restic/internal/repository/index"
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"github.com/restic/restic/internal/repository/pack"
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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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tests := []*pack.PackedBlob{}
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idx := index.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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var blobs pack.Blobs
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pos := uint(0)
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for j := 0; j < 20; j++ {
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length := uint(i*100 + j)
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uncompressedLength := uint(0)
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if i >= 25 {
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// test a mix of compressed and uncompressed packs
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uncompressedLength = 2 * length
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}
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pb := &pack.PackedBlob{
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Pack: packID,
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Blob: pack.Blob{
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BlobHandle: restic.NewRandomBlobHandle(),
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Offset: pos,
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Length: length,
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UncompressedLength: uncompressedLength,
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},
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}
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blobs = append(blobs, pb.Blob)
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tests = append(tests, pb)
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pos += length
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}
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idx.StorePack(packID, blobs)
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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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idx2ID := restic.NewRandomID()
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idx2, err := index.DecodeIndex(wr.Bytes(), idx2ID)
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rtest.OK(t, err)
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rtest.Assert(t, idx2 != nil, "nil returned for decoded index")
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indexID, err := idx2.IDs()
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rtest.OK(t, err)
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rtest.Equals(t, indexID, restic.IDs{idx2ID})
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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 := idx.Lookup(testBlob.Handle(), nil)
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.Handle().ID.String(), len(list), list)
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}
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result := list[0]
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rtest.Equals(t, testBlob, result)
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list2 := idx2.Lookup(testBlob.Handle(), nil)
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if len(list2) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.Handle().ID.String(), len(list2), list2)
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}
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result2 := list2[0]
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rtest.Equals(t, testBlob, result2)
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}
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// add more blobs to idx
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newtests := []*pack.PackedBlob{}
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for i := 0; i < 10; i++ {
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packID := restic.NewRandomID()
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var blobs pack.Blobs
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pos := uint(0)
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for j := 0; j < 10; j++ {
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length := uint(i*100 + j)
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pb := &pack.PackedBlob{
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Pack: packID,
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Blob: pack.Blob{
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BlobHandle: restic.NewRandomBlobHandle(),
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Offset: pos,
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Length: length,
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},
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}
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blobs = append(blobs, pb.Blob)
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newtests = append(newtests, pb)
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pos += length
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}
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idx.StorePack(packID, blobs)
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}
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// finalize; serialize idx, unserialize to idx3
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idx.Finalize()
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wr3 := bytes.NewBuffer(nil)
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err = idx.Encode(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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ids, err := idx.IDs()
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rtest.OK(t, err)
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rtest.Equals(t, restic.IDs{id}, ids)
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idx3, err := index.DecodeIndex(wr3.Bytes(), id)
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rtest.OK(t, err)
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rtest.Assert(t, idx3 != nil, "nil returned for decoded index")
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rtest.Assert(t, idx3.Final(), "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 := idx3.Lookup(testBlob.Handle(), nil)
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if len(list) != 1 {
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t.Errorf("expected one result for blob %v, got %v: %v", testBlob.Handle().ID.String(), len(list), list)
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}
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blob := list[0]
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rtest.Equals(t, testBlob, blob)
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}
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}
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func TestIndexSize(t *testing.T) {
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idx := index.NewIndex()
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packs := 200
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blobCount := 100
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for i := 0; i < packs; i++ {
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packID := restic.NewRandomID()
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var blobs pack.Blobs
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pos := uint(0)
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for j := 0; j < blobCount; j++ {
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length := uint(i*100 + j)
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blobs = append(blobs, pack.Blob{
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BlobHandle: restic.NewRandomBlobHandle(),
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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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idx.StorePack(packID, blobs)
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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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rtest.Equals(t, uint(packs*blobCount), idx.Len(restic.DataBlob))
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rtest.Equals(t, uint(0), idx.Len(restic.TreeBlob))
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t.Logf("Index file size for %d blobs in %d packs is %d", blobCount*packs, packs, wr.Len())
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}
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// example index serialization from doc/Design.rst
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var docExampleV1 = []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": 38
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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": 112
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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 docExampleV2 = []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": 38
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},
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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": 112,
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"uncompressed_length": 511
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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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"uncompressed_length": 234
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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 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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uncompressedLength 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, 38, 0,
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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, 112, 511,
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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, 234,
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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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for _, task := range []struct {
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idxBytes []byte
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version int
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}{
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{docExampleV1, 1},
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{docExampleV2, 2},
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} {
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idx, err := index.DecodeIndex(task.idxBytes, restic.NewRandomID())
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rtest.OK(t, err)
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for _, test := range exampleTests {
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list := idx.Lookup(restic.BlobHandle{ID: test.id, Type: test.tpe}, nil)
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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.Blob.Type)
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rtest.Equals(t, test.offset, blob.Blob.Offset)
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rtest.Equals(t, test.length, blob.Blob.Length)
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switch task.version {
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case 1:
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rtest.Equals(t, uint(0), blob.Blob.UncompressedLength)
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case 2:
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rtest.Equals(t, test.uncompressedLength, blob.Blob.UncompressedLength)
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default:
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t.Fatal("Invalid index version")
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}
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}
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blobs := listPack(t, idx, 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.Handle().ID]
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if !ok {
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t.Errorf("unexpected blob %v found", blob.Handle().ID.String())
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}
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if blob.Blob.Type != b {
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t.Errorf("unexpected type for blob %v: want %v, got %v", blob.Handle().ID.String(), b, blob.Blob.Type)
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}
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}
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}
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}
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func listPack(t testing.TB, idx *index.Index, id restic.ID) (pbs []*pack.PackedBlob) {
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for pb := range idx.Values() {
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if pb.PackID().Equal(id) {
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pbs = append(pbs, pb)
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}
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}
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return pbs
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}
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var (
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benchmarkIndexJSON []byte
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benchmarkIndexJSONOnce sync.Once
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)
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func initBenchmarkIndexJSON() {
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idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
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var buf bytes.Buffer
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err := idx.Encode(&buf)
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if err != nil {
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panic(err)
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}
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benchmarkIndexJSON = buf.Bytes()
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}
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func BenchmarkDecodeIndex(b *testing.B) {
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benchmarkIndexJSONOnce.Do(initBenchmarkIndexJSON)
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id := restic.NewRandomID()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := index.DecodeIndex(benchmarkIndexJSON, id)
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rtest.OK(b, err)
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}
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}
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func BenchmarkDecodeIndexParallel(b *testing.B) {
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benchmarkIndexJSONOnce.Do(initBenchmarkIndexJSON)
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id := restic.NewRandomID()
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b.ResetTimer()
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b.RunParallel(func(pb *testing.PB) {
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for pb.Next() {
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_, err := index.DecodeIndex(benchmarkIndexJSON, id)
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rtest.OK(b, err)
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}
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})
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}
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func BenchmarkEncodeIndex(b *testing.B) {
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for _, n := range []int{100, 1000, 10000} {
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idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), n)
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b.Run(fmt.Sprint(n), func(b *testing.B) {
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buf := new(bytes.Buffer)
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err := idx.Encode(buf)
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rtest.OK(b, err)
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b.ResetTimer()
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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buf.Reset()
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_ = idx.Encode(buf)
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}
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})
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}
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}
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func TestIndexPacks(t *testing.T) {
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idx := index.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.StorePack(packID, pack.Blobs{
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{
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BlobHandle: restic.NewRandomBlobHandle(),
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Offset: 0,
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Length: 23,
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},
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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, packfiles int) (idx *index.Index, lookupBh restic.BlobHandle) {
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idx = index.NewIndex()
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// the expectation is slightly above 8 blobs per pack, so preallocate 9 to be safe
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idx.Preallocate(restic.DataBlob, packfiles*9)
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// create index with given number of pack files
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for i := 0; i < packfiles; i++ {
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packID := NewRandomTestID(rng)
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var blobs pack.Blobs
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offset := 0
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for offset < maxPackSize {
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size := 2000 + rng.Intn(4*1024*1024)
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id := NewRandomTestID(rng)
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blobs = append(blobs, pack.Blob{
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BlobHandle: restic.BlobHandle{
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Type: restic.DataBlob,
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ID: id,
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},
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Length: uint(size),
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UncompressedLength: uint(2 * size),
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Offset: uint(offset),
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})
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offset += size
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}
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idx.StorePack(packID, blobs)
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if i == 0 {
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lookupBh = restic.BlobHandle{
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Type: restic.DataBlob,
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ID: blobs[rng.Intn(len(blobs))].ID,
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}
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}
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}
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return idx, lookupBh
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}
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func BenchmarkIndexHasUnknown(b *testing.B) {
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idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
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handles := make([]restic.BlobHandle, 0, 100000)
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for i := 0; i < cap(handles); i++ {
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handles = append(handles, restic.NewRandomBlobHandle())
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}
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for b.Loop() {
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// use multiple handles to reduce cache effects
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for _, handle := range handles {
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idx.Has(handle)
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}
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}
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}
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func BenchmarkIndexHasKnown(b *testing.B) {
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idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
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handles := make([]restic.BlobHandle, 0, 100000)
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for handle := range idx.Values() {
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handles = append(handles, handle.Handle())
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if len(handles) == cap(handles) {
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break
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}
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}
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for b.Loop() {
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// use multiple handles to reduce cache effects
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for _, handle := range handles {
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idx.Has(handle)
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}
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}
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}
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func BenchmarkIndexAlloc(b *testing.B) {
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rng := rand.New(rand.NewSource(0))
|
|
b.ReportAllocs()
|
|
|
|
for b.Loop() {
|
|
createRandomIndex(rng, 200000)
|
|
}
|
|
}
|
|
|
|
func BenchmarkIndexAllocParallel(b *testing.B) {
|
|
b.ReportAllocs()
|
|
|
|
b.RunParallel(func(pb *testing.PB) {
|
|
rng := rand.New(rand.NewSource(0))
|
|
for pb.Next() {
|
|
createRandomIndex(rng, 200000)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestIndexHas(t *testing.T) {
|
|
tests := []*pack.PackedBlob{}
|
|
|
|
idx := index.NewIndex()
|
|
|
|
// create 50 packs with 20 blobs each
|
|
for i := 0; i < 50; i++ {
|
|
packID := restic.NewRandomID()
|
|
var blobs pack.Blobs
|
|
|
|
pos := uint(0)
|
|
for j := 0; j < 20; j++ {
|
|
length := uint(i*100 + j)
|
|
uncompressedLength := uint(0)
|
|
if i >= 25 {
|
|
// test a mix of compressed and uncompressed packs
|
|
uncompressedLength = 2 * length
|
|
}
|
|
pb := &pack.PackedBlob{
|
|
Pack: packID,
|
|
Blob: pack.Blob{
|
|
BlobHandle: restic.NewRandomBlobHandle(),
|
|
Offset: pos,
|
|
Length: length,
|
|
UncompressedLength: uncompressedLength,
|
|
},
|
|
}
|
|
blobs = append(blobs, pb.Blob)
|
|
tests = append(tests, pb)
|
|
pos += length
|
|
}
|
|
idx.StorePack(packID, blobs)
|
|
}
|
|
|
|
for _, testBlob := range tests {
|
|
rtest.Assert(t, idx.Has(testBlob.Handle()), "Index reports not having data blob added to it")
|
|
}
|
|
|
|
rtest.Assert(t, !idx.Has(restic.NewRandomBlobHandle()), "Index reports having a data blob not added to it")
|
|
rtest.Assert(t, !idx.Has(restic.BlobHandle{ID: tests[0].Handle().ID, Type: restic.TreeBlob}), "Index reports having a tree blob added to it with the same id as a data blob")
|
|
}
|
|
|
|
func TestMixedEachByPack(t *testing.T) {
|
|
idx := index.NewIndex()
|
|
|
|
expected := make(map[restic.ID]int)
|
|
// create 50 packs with 2 blobs each
|
|
for i := 0; i < 50; i++ {
|
|
packID := restic.NewRandomID()
|
|
expected[packID] = 1
|
|
blobs := pack.Blobs{
|
|
{
|
|
BlobHandle: restic.BlobHandle{Type: restic.DataBlob, ID: restic.NewRandomID()},
|
|
Offset: 0,
|
|
Length: 42,
|
|
},
|
|
{
|
|
BlobHandle: restic.BlobHandle{Type: restic.TreeBlob, ID: restic.NewRandomID()},
|
|
Offset: 42,
|
|
Length: 43,
|
|
},
|
|
}
|
|
idx.StorePack(packID, blobs)
|
|
}
|
|
|
|
reported := make(map[restic.ID]int)
|
|
for bp := range idx.EachByPack(context.TODO(), restic.NewIDSet()) {
|
|
reported[bp.PackID]++
|
|
|
|
rtest.Equals(t, 2, len(bp.Blobs)) // correct blob count
|
|
bp.Blobs.Sort()
|
|
b0 := bp.Blobs[0]
|
|
rtest.Assert(t, b0.Type == restic.DataBlob && b0.Offset == 0 && b0.Length == 42, "wrong blob", b0)
|
|
b1 := bp.Blobs[1]
|
|
rtest.Assert(t, b1.Type == restic.TreeBlob && b1.Offset == 42 && b1.Length == 43, "wrong blob", b1)
|
|
}
|
|
rtest.Equals(t, expected, reported)
|
|
}
|
|
|
|
func TestEachByPackIgnoes(t *testing.T) {
|
|
idx := index.NewIndex()
|
|
|
|
ignores := restic.NewIDSet()
|
|
expected := make(map[restic.ID]int)
|
|
// create 50 packs with one blob each
|
|
for i := 0; i < 50; i++ {
|
|
packID := restic.NewRandomID()
|
|
if i < 3 {
|
|
ignores.Insert(packID)
|
|
} else {
|
|
expected[packID] = 1
|
|
}
|
|
blobs := pack.Blobs{
|
|
{
|
|
BlobHandle: restic.BlobHandle{Type: restic.DataBlob, ID: restic.NewRandomID()},
|
|
Offset: 0,
|
|
Length: 42,
|
|
},
|
|
}
|
|
idx.StorePack(packID, blobs)
|
|
}
|
|
idx.Finalize()
|
|
|
|
reported := make(map[restic.ID]int)
|
|
for bp := range idx.EachByPack(context.TODO(), ignores) {
|
|
reported[bp.PackID]++
|
|
rtest.Equals(t, 1, len(bp.Blobs)) // correct blob count
|
|
b0 := bp.Blobs[0]
|
|
rtest.Assert(t, b0.Type == restic.DataBlob && b0.Offset == 0 && b0.Length == 42, "wrong blob", b0)
|
|
}
|
|
rtest.Equals(t, expected, reported)
|
|
}
|