2017-09-21 14:37 GMT+02:00 Craig Barratt via BackupPC-users
<backuppc-users@lists.sourceforge.net>:
> Yes, Les is right - if you change compression (on to off, or off to on) then
> the next backup will be like a first-time backup - it will be forced to a
> full and will not take advantage of any prior backup.

I know, but in my case, when i've changed compression to 0, backup was
already running, thus it was
not affected by this change.

Anyway, next backups should run a little bit faster as they don't have
to compress every file.

> Back to OP - from the rsync_bpc args you sent, it looks like you have
> XferLogLevel set to 0.  I'd recommend at least 1 or 2.  That would help
> confirm your excludes are correct (they do look pretty comprehensive, but
> you should verify the actual files being backed up match your intended
> excludes).  As earlier posters pointed out, incorrect excludes could mean
> you are trying to backup potentially very large files.

Very large file would produce some output on strace and is not my case.

> What is the version of your remote rsync?

I was on 3.1.0, but i've updated to the latest one.
Nothing changed.

> Have you confirmed you are not running short of server memory?

No memory issue, it's the first thing that i've checked.

> You could see whether ZFS is the issue by (temporarily) running a new
> BackuipPC instance with storage on a different file system (eg, ext4).

This is a new install, previously (about 15-20 days ago) i was on XFS
and even before on ext4.
ZFS is the fastest one (particularry when deleting huge directories
with tons of hardlinks made by rsnapshot)

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