restic v0.10.0 Release Notes

Release Date: 2020-09-19 // almost 4 years ago
  • โšก๏ธ We're very pleased to present you restic 0.10.0! restic is distributed as a standalone binary: download the correct file for your operating system and architecture, extract the file and just run it. If you run into any issues, please report them at the GitHub issue tracker or visit the forum. If you already have restic >= 0.9.4, you can use restic self-update to get the latest version in a secure way.

    ๐Ÿ“š The binaries released with each restic version are reproducible, which means that you can reproduce a byte identical version from the source code for that release. Instructions on how to do that in the Developer Documentation.

    ๐Ÿ”„ Changelog for restic 0.10.0 (2020-09-19)

    The following sections list the changes in restic 0.10.0 relevant to restic users. The changes are ordered by importance.

    Summary

    • ๐Ÿ›  Fix #1863: Report correct number of directories processed by backup
    • ๐Ÿ›  Fix #2254: Fix tar issues when dumping /
    • ๐Ÿ›  Fix #2281: Handle format verbs like '%' properly in find output
    • ๐Ÿ›  Fix #2298: Do not hang when run as a background job
    • ๐Ÿ›  Fix #2389: Fix mangled json output of backup command
    • ๐Ÿ›  Fix #2390: Refresh lock timestamp
    • Fix #2429: Backup --json reports total_bytes_processed as 0
    • ๐Ÿ›  Fix #2469: Fix incorrect bytes stats in diff command
    • ๐Ÿ›  Fix #2518: Do not crash with Synology NAS sftp server
    • ๐Ÿ›  Fix #2531: Fix incorrect size calculation in stats --mode restore-size
    • ๐Ÿ›  Fix #2537: Fix incorrect file counts in stats --mode restore-size
    • ๐Ÿ›  Fix #2592: SFTP backend supports IPv6 addresses
    • Fix #2607: Honor RESTIC_CACHE_DIR environment variable on Mac and Windows
    • ๐Ÿ›  Fix #2668: Don't abort the stats command when data blobs are missing
    • ๐Ÿ›  Fix #2674: Add stricter prune error checks
    • ๐Ÿ›  Fix #2899: Fix possible crash in the progress bar of check --read-data
    • ๐Ÿšš Chg #2482: Remove vendored dependencies
    • Chg #2546: Return exit code 3 when failing to backup all source data
    • โšก๏ธ Chg #2600: Update dependencies, require Go >= 1.13
    • ๐Ÿ”’ Chg #1597: Honor the --no-lock flag in the mount command
    • ๐Ÿ‘ Enh #1570: Support specifying multiple host flags for various commands
    • โšก๏ธ Enh #1680: Optimize restic mount
    • Enh #2072: Display snapshot date when using restic find
    • Enh #2175: Allow specifying user and host when creating keys
    • ๐Ÿ‘ Enh #2277: Add support for ppc64le
    • ๐Ÿ”€ Enh #2395: Ignore sync errors when operation not supported by local filesystem
    • Enh #2427: Add flag --iexclude-file to backup command
    • ๐Ÿ‘ Enh #2569: Support excluding files by their size
    • Enh #2571: Self-heal missing file parts during backup of unchanged files
    • ๐Ÿ‘ Enh #2858: Support filtering snapshots by tag and path in the stats command
    • Enh #323: Add command for copying snapshots between repositories
    • โšก๏ธ Enh #551: Use optimized library for hash calculation of file chunks
    • ๐ŸŽ Enh #2195: Simplify and improve restore performance
    • Enh #2328: Improve speed of check command
    • ๐Ÿ“œ Enh #2423: Support user@domain parsing as user
    • Enh #2576: Improve the chunking algorithm
    • Enh #2598: Improve speed of diff command
    • Enh #2599: Slightly reduce memory usage of prune and stats commands
    • ๐Ÿ‘ Enh #2733: S3 backend: Add support for WebIdentityTokenFile
    • โšก๏ธ Enh #2773: Optimize handling of new index entries
    • Enh #2781: Reduce memory consumption of in-memory index
    • โšก๏ธ Enh #2786: Optimize list blobs command
    • โšก๏ธ Enh #2790: Optimized file access in restic mount
    • Enh #2840: Speed-up file deletion in forget, prune and rebuild-index

    Details

    ๐Ÿ›  Bugfix #1863: Report correct number of directories processed by backup

    ๐Ÿ›  The directory statistics calculation was fixed to report the actual number of processed directories instead of always zero.

    #1863

    ๐Ÿ›  Bugfix #2254: Fix tar issues when dumping /

    ๐Ÿ We've fixed an issue with dumping either / or files on the first sublevel e.g. /foo to tar. This also fixes tar dumping issues on Windows where this issue could also happen.

    #2254 #2357 #2255

    ๐Ÿ›  Bugfix #2281: Handle format verbs like '%' properly in find output

    ๐Ÿ“ฆ The JSON or "normal" output of the find command can now deal with file names that contain substrings which the Golang fmt package considers "format verbs" like %s.

    #2281

    ๐Ÿ›  Bugfix #2298: Do not hang when run as a background job

    ๐Ÿ”ง Restic did hang on exit while restoring the terminal configuration when it was started as a background job, for example using restic ... &. This has been fixed by only restoring the terminal configuration when restic is interrupted while reading a password from the terminal.

    #2298

    ๐Ÿ›  Bugfix #2389: Fix mangled json output of backup command

    ๐Ÿ–จ We've fixed a race condition in the json output of the backup command that could cause multiple lines to get mixed up. We've also ensured that the backup summary is printed last.

    #2389 #2545

    ๐Ÿ›  Bugfix #2390: Refresh lock timestamp

    ๐Ÿ”’ Long-running operations did not refresh lock timestamp, resulting in locks becoming stale. This is now fixed.

    #2390

    Bugfix #2429: Backup --json reports total_bytes_processed as 0

    We've fixed the json output of total_bytes_processed. The non-json output was already fixed with pull request #2138 but left the json output untouched.

    #2429

    ๐Ÿ›  Bugfix #2469: Fix incorrect bytes stats in diff command

    ๐Ÿ›  In some cases, the wrong number of bytes (e.g. 16777215.998 TiB) were reported by the diff command. This is now fixed.

    #2469

    ๐Ÿ›  Bugfix #2518: Do not crash with Synology NAS sftp server

    ๐Ÿ›  It was found that when restic is used to store data on an sftp server on a Synology NAS with a relative path (one which does not start with a slash), it may go into an endless loop trying to create directories on the server. We've fixed this bug by using a function in the sftp library instead of our own implementation.

    ๐Ÿ™‹ The bug was discovered because the Synology sftp server behaves erratic with non-absolute path (e.g. home/restic-repo). This can be resolved by just using an absolute path instead (/home/restic-repo). We've also added a paragraph in the FAQ.

    #2518 #2363 #2530

    ๐Ÿ›  Bugfix #2531: Fix incorrect size calculation in stats --mode restore-size

    โช The restore-size mode of stats was counting hard-linked files as if they were independent.

    #2531

    ๐Ÿ›  Bugfix #2537: Fix incorrect file counts in stats --mode restore-size

    โช The restore-size mode of stats was failing to count empty directories and some files with hard links.

    #2537

    ๐Ÿ›  Bugfix #2592: SFTP backend supports IPv6 addresses

    ๐Ÿ”ง The SFTP backend now supports IPv6 addresses natively, without relying on aliases in the external SSH configuration.

    #2592

    Bugfix #2607: Honor RESTIC_CACHE_DIR environment variable on Mac and Windows

    On Mac and Windows, the RESTIC_CACHE_DIR environment variable was ignored. This variable can now be used on all platforms to set the directory where restic stores caches.

    #2607

    ๐Ÿ›  Bugfix #2668: Don't abort the stats command when data blobs are missing

    โš™ Runing the stats command in the blobs-per-file mode on a repository with missing data blobs previously resulted in a crash.

    #2668

    ๐Ÿ›  Bugfix #2674: Add stricter prune error checks

    โž• Additional checks were added to the prune command in order to improve resiliency to backend, hardware and/or networking issues. The checks now detect a few more cases where such outside factors could potentially cause data loss.

    #2674

    ๐Ÿ›  Bugfix #2899: Fix possible crash in the progress bar of check --read-data

    ๐Ÿ We've fixed a possible crash while displaying the progress bar for the check --read-data command. The crash occurred when the length of the progress bar status exceeded the terminal width, which only happened for very narrow terminal windows.

    ๐Ÿ‘ฏ #2899 https://forum.restic.net/t/restic-rclone-pcloud-connection-issues/2963/15

    ๐Ÿ”„ Change #2482: Remove vendored dependencies

    ๐Ÿ“š We've removed the vendored dependencies (in the subdir vendor/). When building restic, the Go compiler automatically fetches the dependencies. It will also cryptographically verify that the correct code has been fetched by using the hashes in go.sum (see the link to the documentation below).

    #2482 https://golang.org/cmd/go/#hdr-Module_downloading_and_verification

    ๐Ÿ”„ Change #2546: Return exit code 3 when failing to backup all source data

    The backup command used to return a zero exit code as long as a snapshot could be created successfully, even if some of the source files could not be read (in which case the snapshot would contain the rest of the files).

    This made it hard for automation/scripts to detect failures/incomplete backups by looking at the exit code. Restic now returns the following exit codes for the backup command:

    • 0 when the command was successful
    • 1 when there was a fatal error (no snapshot created)
    • 3 when some source data could not be read (incomplete snapshot created)

    #956 #2064 #2526 #2364 #2546

    โšก๏ธ Change #2600: Update dependencies, require Go >= 1.13

    ๐Ÿ— Restic now requires Go to be at least 1.13. This allows simplifications in the build process and removing workarounds.

    ๐ŸŽ This is also probably the last version of restic still supporting mounting repositories via fuse on macOS. The library we're using for fuse does not support macOS any more and osxfuse is not open source any more.

    #224 #590 #2600 #2852 #2927

    ๐Ÿ”’ Change #1597: Honor the --no-lock flag in the mount command

    ๐Ÿ”’ The mount command now does not lock the repository if given the --no-lock flag. This allows to mount repositories which are archived on a read only backend/filesystem.

    #1597 #2821

    โœจ Enhancement #1570: Support specifying multiple host flags for various commands

    Previously commands didn't take more than one --host or -H argument into account, which could be limiting with e.g. the forget command.

    โช The dump, find, forget, ls, mount, restore, snapshots, stats and tag commands will now take into account multiple --host and -H flags.

    #1570

    โœจ Enhancement #1680: Optimize restic mount

    โšก๏ธ We've optimized the FUSE implementation used within restic. restic mount is now more responsive and uses less memory.

    #1680 #2587 #2787

    โœจ Enhancement #2072: Display snapshot date when using restic find

    โž• Added the respective snapshot date to the output of restic find.

    #2072

    โœจ Enhancement #2175: Allow specifying user and host when creating keys

    0๏ธโƒฃ When adding a new key to the repository, the username and hostname for the new key can be specified on the command line. This allows overriding the defaults, for example if you would prefer to use the FQDN to identify the host or if you want to add keys for several different hosts without having to run the key add command on those hosts.

    #2175

    โœจ Enhancement #2277: Add support for ppc64le

    โž• Adds support for ppc64le, the processor architecture from IBM.

    #2277

    โœจ Enhancement #2395: Ignore sync errors when operation not supported by local filesystem

    ๐Ÿ”€ The local backend has been modified to work with filesystems which doesn't support the sync operation. This operation is normally used by restic to ensure that data files are fully written to disk before continuing.

    ๐ŸŽ For these limited filesystems, saving a file in the backend would previously fail with an "operation not supported" error. This error is now ignored, which means that e.g. an SMB mount on macOS can now be used as storage location for a repository.

    ๐Ÿ”€ #2395 https://forum.restic.net/t/sync-errors-on-mac-over-smb/1859

    โœจ Enhancement #2427: Add flag --iexclude-file to backup command

    ๐Ÿ‘ The backup command now supports the flag --iexclude-file which is a case-insensitive version of --exclude-file.

    #2427 #2898

    โœจ Enhancement #2569: Support excluding files by their size

    ๐Ÿ‘ The backup command now supports the --exclude-larger-than option to exclude files which are larger than the specified maximum size. This can for example be useful to exclude unimportant files with a large file size.

    #2569 #2914

    โœจ Enhancement #2571: Self-heal missing file parts during backup of unchanged files

    We've improved the resilience of restic to certain types of repository corruption.

    For files that are unchanged since the parent snapshot, the backup command now verifies that all parts of the files still exist in the repository. Parts that are missing, e.g. from a damaged repository, are backed up again. This verification was already run for files that were modified since the parent snapshot, but is now also done for unchanged files.

    Note that restic will not backup file parts that are referenced in the index but where the actual data is not present on disk, as this situation can only be detected by restic check. Please ensure that you run restic check regularly.

    #2571 #2827

    โœจ Enhancement #2858: Support filtering snapshots by tag and path in the stats command

    โœ… We've added filtering snapshots by --tag tagList and by --path path to the stats command. This includes filtering of only 'latest' snapshots or all snapshots in a repository.

    #2858 #2859 https://forum.restic.net/t/stats-for-a-host-and-filtered-snapshots/3020

    โœจ Enhancement #323: Add command for copying snapshots between repositories

    We've added a copy command, allowing you to copy snapshots from one repository to another.

    Note that this process will have to read (download) and write (upload) the entire snapshot(s) due to the different encryption keys used on the source and destination repository. Also, the transferred files are not re-chunked, which may break deduplication between files already stored in the destination repo and files copied there using this command.

    ๐Ÿ‘ To fully support deduplication between repositories when the copy command is used, the init command now supports the --copy-chunker-params option, which initializes the new repository with identical parameters for splitting files into chunks as an already existing repository. This allows copied snapshots to be equally deduplicated in both repositories.

    #323 #2606 #2928

    โœจ Enhancement #551: Use optimized library for hash calculation of file chunks

    โšก๏ธ We've switched the library used to calculate the hashes of file chunks, which are used for deduplication, to the optimized Minio SHA-256 implementation.

    Depending on the CPU it improves the hashing throughput by 10-30%. Modern x86 CPUs with the SHA Extension should be about two to three times faster.

    #551 #2709

    โœจ Enhancement #2195: Simplify and improve restore performance

    ๐ŸŽ Significantly improves restore performance of large files (i.e. 50M+): #2074 https://forum.restic.net/t/restore-using-rclone-gdrive-backend-is-slow/1112/8 https://forum.restic.net/t/degraded-restore-performance-s3-backend/1400

    ๐Ÿ›  Fixes "not enough cache capacity" error during restore: #2244

    โช NOTE: This new implementation does not guarantee order in which blobs are written to the target files and, for example, the last blob of a file can be written to the file before any of the preceeding file blobs. It is therefore possible to have gaps in the data written to the target files if restore fails or interrupted by the user.

    ๐ŸŽ The implementation will try to preallocate space for the restored files on the filesystem to prevent file fragmentation. This ensures good read performance for large files, like for example VM images. If preallocating space is not supported by the filesystem, then this step is silently skipped.

    #2195 #2893

    โœจ Enhancement #2328: Improve speed of check command

    We've improved the check command to traverse trees only once independent of whether they are contained in multiple snapshots. The check command is now much faster for repositories with a large number of snapshots.

    #2284 #2328

    โœจ Enhancement #2423: Support user@domain parsing as user

    โž• Added the ability for user@domain-like users to be authenticated over SFTP servers.

    #2423

    โœจ Enhancement #2576: Improve the chunking algorithm

    โšก๏ธ We've updated the chunker library responsible for splitting files into smaller blocks. It should improve the chunking throughput by 5-15% depending on the CPU.

    #2820 #2576 #2845

    โœจ Enhancement #2598: Improve speed of diff command

    ๐ŸŽ We've improved the performance of the diff command when comparing snapshots with similar content. It should run up to twice as fast as before.

    #2598

    โœจ Enhancement #2599: Slightly reduce memory usage of prune and stats commands

    The prune and the stats command kept directory identifiers in memory twice while searching for used blobs.

    #2599

    โœจ Enhancement #2733: S3 backend: Add support for WebIdentityTokenFile

    ๐Ÿ‘ We've added support for EKS IAM roles for service accounts feature to the S3 backend.

    #2703 #2733

    โœจ Enhancement #2773: Optimize handling of new index entries

    Restic now uses less memory for backups which add a lot of data, e.g. large initial backups. In addition, we've improved the stability in some edge cases.

    #2773

    โœจ Enhancement #2781: Reduce memory consumption of in-memory index

    We've improved how the index is stored in memory. This change can reduce memory usage for large repositories by up to 50% (depending on the operation).

    #2781 #2812

    โœจ Enhancement #2786: Optimize list blobs command

    We've changed the implementation of list blobs which should be now a bit faster and consume almost no memory even for large repositories.

    #2786

    โœจ Enhancement #2790: Optimized file access in restic mount

    Reading large (> 100GiB) files from restic mountpoints is now faster, and the speedup is greater for larger files.

    #2790

    โœจ Enhancement #2840: Speed-up file deletion in forget, prune and rebuild-index

    We've sped up the file deletion for the commands forget, prune and rebuild-index, especially for remote repositories. Deletion was sequential before and is now run in parallel.

    #2840