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41 lines
2.4 KiB
Markdown
41 lines
2.4 KiB
Markdown
# Description
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Simple and handy btrfs snapshoting tool. Supports unattended snapshots, tracking, restoring, automatic cleanup and more. Backed with SQLite.
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# Documentation
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See the [docs folder](https://github.com/Edu4rdSHL/rusnapshot/blob/master/docs/).
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# Features
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- Allows you to specify the origin and destination of snapshots at will of the user.
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- Track snapshots using SQLite as backend database.
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- Easy setup using small templates instead of confusing long files.
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- You can create snapshots of the volumes you want simply by using different configuration templates.
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- You can create read-only or read-write snapshots.
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- You can use the same SQLite database for everything.
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- You can specify the prefix of the name for the snapshots.
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- You can specify a `kind` identifier to differentiate them in the database. Useful if you plan to have hourly, weekly, montly or more "kind" of snapshots of the same subvolume(s).
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- Supports restoration of snapshots in the original directory or a specific one.
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- Automatic snapshots cleanup.
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- Nice CLI output to see the status and details of snapshots.
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# Known limitations
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Due to SQLite limitations to handle concurrent database operations, we need to make use of SQLite's [busy_timeout](https://www.sqlite.org/c3ref/busy_timeout.html), which was initially implemented in [ce44bf6](https://github.com/Edu4rdSHL/rusnapshot/commit/ce44bf679c73d221811ac775561916a8c5761243). Without it you will get the error: `Error: database is locked (code 5)` if you try to make concurrent snapshots exactly at the same time. The default timeout is 5 seconds which is more than enough time so that no problem occurs even in the most demanding scenarios.
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In summary, `busy_timeout` is the maximum time that SQLite will retry the failed transaction. Considering that Rusnapshot's database operations are small and shouldn't take long, 5 seconds is a decent time. If you continue to get the mentioned error, try increasing `--timeout`, remember that the value must be in milliseconds.
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# Screenshots
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## List snapshots
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## Create and restore snapshot
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## Delete snapshot
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