Hi Burkhard,
Am 02.11.22 um 15:30 schrieb Burkhard Linke:
1. Is it possible to run a script within a job and skip the job
depending on exit code?
Running scripts is only possible with RunScript right now. Using that
you could fail the job, but that's probably not what you want.
2. Is it possible to pass the timestamp of the last job run to such a
script?
When you run a job it will have a so-called "since-time" which is the
time when the previous job started (when you run a differential job, it
is the time of the full that is based on).
When you configure a RunScript you can use "%s" as a placeholder that
will be replaced by the since-time.
3. Can a skip method be implemented in the FD itself? Check whether a
directory is using cephfs, check whether recursive stats are available,
skip if rctime is older than last job run?
That would be doable, but the xattr code is pretty far away from the
code that traverses the directory tree, so it is probably not as
straightforward as it might seem at first.
4. Use a FD plugin instead of extending the FD core code?
That is probably the way to go - at least to get a working proof of
concept running.
We are currently working on a change that will improve plugin
performance a lot (see PR #1297 [1]). With that change, a plugin can now
pass open file descriptors to the core allowing it to achieve
near-native backup performance with a plugin.
In a plugin you also have much more freedom to adapt to the needs of the
system you're backing up. In case of cephfs you could easily take a
snapshot and then rewrite the paths to remove the /.snap/your-snapshot/
so restore will just write to the right location.
Having said all that, I wonder how you want to proceed.
We can probably provide some limited guidance to get you started
implementing a plugin yourself, or I can get you in touch with sales to
discuss funded development for this.
Best Regards,
Andreas
[1] https://github.com/bareos/bareos/pull/1297/
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