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repo: Try cached pack files first

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This commit is contained in:
Alexander Neumann 2017-07-16 21:06:43 +02:00
parent 70248bd05a
commit e299272378
1 changed files with 24 additions and 1 deletions
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25
internal/repository/repository.go
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@ -87,6 +87,26 @@ func (r *Repository) LoadAndDecrypt(ctx context.Context, t restic.FileType, id r
return buf[:n], nil
}
// sortCachedPacks moves all cached pack files to the front of blobs.
func (r *Repository) sortCachedPacks(blobs []restic.PackedBlob) []restic.PackedBlob {
if r.Cache == nil {
return blobs
}
cached := make([]restic.PackedBlob, 0, len(blobs)/2)
noncached := make([]restic.PackedBlob, 0, len(blobs)/2)
for _, blob := range blobs {
if r.Cache.Has(restic.Handle{Type: restic.DataFile, Name: blob.PackID.String()}) {
cached = append(cached, blob)
continue
}
noncached = append(noncached, blob)
}
return append(cached, noncached...)
}
// loadBlob tries to load and decrypt content identified by t and id from a
// pack from the backend, the result is stored in plaintextBuf, which must be
// large enough to hold the complete blob.
@ -100,9 +120,12 @@ func (r *Repository) loadBlob(ctx context.Context, id restic.ID, t restic.BlobTy
return 0, err
}
// try cached pack files first
blobs = r.sortCachedPacks(blobs)
var lastError error
for _, blob := range blobs {
debug.Log("id %v found: %v", id.Str(), blob)
debug.Log("blob %v/%v found: %v", t, id.Str(), blob)
if blob.Type != t {
debug.Log("blob %v has wrong block type, want %v", blob, t)