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Commit Graph

38 Commits

Author SHA1 Message Date
Michael Eischer
1ebd57247a repository: optimize MasterIndex.Each
Sending data through a channel at very high frequency is extremely
inefficient. Thus use simple callbacks instead of channels.

> name                old time/op  new time/op  delta
> MasterIndexEach-16   6.68s ±24%   0.96s ± 2%  -85.64%  (p=0.008 n=5+5)
2022-09-24 12:21:59 +02:00
Kyle Brennan
1e3f05c3f1 repository: prevent header overfill 2022-08-05 23:47:12 +02:00
Michael Eischer
9729e6d7ef backend: extract readerat from restic package 2022-07-17 15:29:09 +02:00
Michael Eischer
8c11fc3ec9 crypto: move crypto buffer helpers 2022-07-17 13:42:23 +02:00
Michael Eischer
120ccc8754 repository: Rework blob saving to use an async pack uploader
Previously, SaveAndEncrypt would assemble blobs into packs and either
return immediately if the pack is not yet full or upload the pack file
otherwise. The upload will block the current goroutine until it
finishes.

Now, the upload is done using separate goroutines. This requires changes
to the error handling. As uploads are no longer tied to a SaveAndEncrypt
call, failed uploads are signaled using an errgroup.

To count the uploaded amount of data, the pack header overhead is no
longer returned by `packer.Finalize` but rather by
`packer.HeaderOverhead`. This helper method is necessary to continue
returning the pack header overhead directly to the responsible call to
`repository.SaveBlob`. Without the method this would not be possible,
as packs are finalized asynchronously.
2022-07-02 22:42:34 +02:00
Michael Eischer
a6e9e08034 Account for pack header overhead at each entry
This will miss the pack header crypto overhead and the length field,
which only amount to a few bytes per pack file.
2022-07-02 18:55:58 +02:00
greatroar
a0fa9c6e9f Revert "restic prune: Merge three loops over the index"
This reverts commit 8bdfcf779f.
Should fix #3809. Also needed to make #3290 apply cleanly.
2022-06-30 15:27:34 +02:00
greatroar
8bdfcf779f restic prune: Merge three loops over the index
There were three loops over the index in restic prune, to find
duplicates, to determine sizes (in pack.Size) and to generate packInfos.
These three are now one loop. This way, prune doesn't need to construct
a set of duplicate blobs, pack.Size doesn't need to contain special
logic for prune's use case (the onlyHdr argument) and pack.Size doesn't
need to construct a map only to have it immediately transformed into a
different map.

Some quick testing on a 160GiB local repo doesn't show running time or
memory use of restic prune --dry-run changing significantly.
2022-06-18 10:40:33 +02:00
Michael Eischer
bcab548617 pack: slightly expand testing of compressed blobs 2022-04-30 11:34:10 +02:00
Michael Eischer
6fb408d90e repository: implement pack compression 2022-04-30 11:34:10 +02:00
Michael Eischer
fefe9f5c0e pack: Hide more implementation details 2022-03-28 22:12:16 +02:00
Michael Eischer
a773cb6527 pack: cleanup header size calculation 2022-03-28 22:09:49 +02:00
Michael Eischer
f78bd14e28 repository: Remove pack implementation details from MasterIndex 2022-03-28 22:09:49 +02:00
Michael Eischer
f1e58e7c7f checker: rewrite ReadData to stream packs 2022-02-12 20:18:25 +01:00
Michael Eischer
9aa2eff384 Add plumbing to calculate backend specific file hash for upload
This enables the backends to request the calculation of a
backend-specific hash. For the currently supported backends this will
always be MD5. The hash calculation happens as early as possible, for
pack files this is during assembly of the pack file. That way the hash
would even capture corruptions of the temporary pack file on disk.
2021-08-04 22:17:46 +02:00
Alexander Neumann
04ca69cc78 Address issues reported by golint 2021-01-30 20:45:57 +01:00
Alexander Neumann
0858fbf6aa Add more error handling 2021-01-30 20:19:47 +01:00
Alexander Weiss
92bd448691 Make BlobHandle substruct of Blob 2020-11-22 20:41:10 +01:00
Alexander Weiss
ce5d630681 Add MasterIndex.PackSize() 2020-11-21 22:13:54 +01:00
Alexander Weiss
c3ddde9e7d Return hdrSize in ListPack 2020-11-21 22:13:54 +01:00
greatroar
ab2b7d7f9a Decrease allocation rate in internal/pack
internal/repository benchmark results:

name             old time/op    new time/op    delta
PackerManager-8     179ms ± 1%     181ms ± 1%   +0.78%  (p=0.009 n=10+10)

name             old speed      new speed      delta
PackerManager-8   294MB/s ± 1%   292MB/s ± 1%   -0.77%  (p=0.009 n=10+10)

name             old alloc/op   new alloc/op   delta
PackerManager-8    91.3kB ± 0%    72.2kB ± 0%  -20.92%  (p=0.000 n=9+7)

name             old allocs/op  new allocs/op  delta
PackerManager-8     1.38k ± 0%     0.76k ± 0%  -45.20%  (p=0.000 n=10+7)
2020-11-15 16:51:47 +01:00
greatroar
9a8a2cae4c Move pack testing logic to test file 2020-11-15 16:45:49 +01:00
Alexander Weiss
581d90cf91 Make some pack parameters public 2020-11-03 16:42:21 +01:00
Michael Eischer
e638b46a13 Embed context into ReaderAt
The io.Reader interface does not support contexts, such that it is
necessary to embed the context into the backendReaderAt struct. This has
the problem that a reader might suddenly stop working when it's
contained context is canceled. However, this is now problem here as the
reader instances never escape the calling function.
2020-10-09 22:39:07 +02:00
aawsome
0fed6a8dfc
Use "pack file" instead of "data file" (#2885)
- changed variable names, especially changed DataFile into PackFile
- changed in some comments
- always use "pack file" in docu
2020-08-16 11:16:38 +02:00
greatroar
74a64c47e4 Move testing logic to test file in internal/pack 2020-03-09 14:32:28 +01:00
greatroar
a23e9c86ba Remove closing logic from Packer.Finalize
The method only ever receives *hashing.Writers, which don't implement
io.Closer. These come from packerManager.findPacker and have their
actual writers closed in Repository.savePacker. Moving the closing logic
to hashing.Writer results in "file already closed" errors.
2020-03-09 14:31:45 +01:00
Alexander Neumann
99f7fd74e3 backend: Improve Save()
As mentioned in issue [#1560](https://github.com/restic/restic/pull/1560#issuecomment-364689346)
this changes the signature for `backend.Save()`. It now takes a
parameter of interface type `RewindReader`, so that the backend
implementations or our `RetryBackend` middleware can reset the reader to
the beginning and then retry an upload operation.

The `RewindReader` interface also provides a `Length()` method, which is
used in the backend to get the size of the data to be saved. This
removes several ugly hacks we had to do to pull the size back out of the
`io.Reader` passed to `Save()` before. In the `s3` and `rest` backend
this is actively used.
2018-03-03 15:49:44 +01:00
Toby Burress
08a5281bd4 Incorporate PR review comments. 2018-02-22 17:37:10 +00:00
Toby Burress
cdb48a8970 Add tests for the eager-header refactor. 2018-02-22 01:14:04 +00:00
Toby Burress
4fd5f0b8a9 Refactor the eager-header reads for readability.
This pulls the header reads into a function that works in terms of the
number of records requested.  This preserves the existing logic of
initially reading 15 records and then falling back if that fails.

In the event of a header with more than 15 records, it will read all
records, including the already-seen final 15 records.
2018-02-22 00:45:40 +00:00
Igor Fedorenko
19e7803ac6 Fixed unexpected 'pack file cannot be listed' error
Fixes #1633

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
2018-02-20 21:28:57 -05:00
Igor Fedorenko
953f3d55ee Optimize pack readHeader() implementation
Load pack header length and 15 header entries with single backend
request. This eliminates separate header Load() request for most pack
files and significantly improves index.New() performance.

Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
2018-01-23 22:02:25 -05:00
Alexander Neumann
931e6ed2ac Use Seal/Open everywhere 2017-11-01 10:30:40 +01:00
Herbert
3473c3f7b6 Remove all dot-imports 2017-10-02 15:06:39 +02:00
Alexander Neumann
23c903074c Move restic package to internal/restic 2017-07-24 17:43:32 +02:00
Alexander Neumann
6caeff2408 Run goimports 2017-07-23 14:21:03 +02:00
Alexander Neumann
83d1a46526 Moves files 2017-07-23 14:19:13 +02:00