On Fri, Jul 18, 2025 at 2:59 PM G.W. Haywood <bac...@jubileegroup.co.uk> wrote:
> > Is there anything in the logs which might shed any light? > Nothing that looked meaningful to me. > > Are you saying that during the period in which you allow backups there > should be enough time to perform a backup for every client, but that a > client wasn't getting backed up despite that? > Yes. > > If there was enough time then something seems wrong, but if the 8.1 > hours is too short I'd guess one way or another you'll have a problem. > Buut I'd call it a configuration problem. (BTW I don't think 23.9 in > the blackout times means 23:59. More like 23:54.) > Yeah, I was approximating. :) The 8-ish hours is not enough time to back up all hosts, but only the one host has that restriction. With MaxBackups=1, I think all hosts were getting backed up within about 16 hours. The behaviour I was seeing is that there was a low probability that the host with the blackout period would end up near the top of the queue outside its blackout period. It's possible the problem is compounded by the fact that the end of its blackout period coincides with the first wakeup. (blackout period ends at ~midnight, but there is no 0h wakeup by default... 1st wakeup is at 01:00). What I was seeing is that the first 8 hours of the day, when this host could be backed up, the queue was concentrating on other hosts. Then there'd be a long period at the end of the day where nothing was being backed up.. because everything _except_ the host with the blackout period had been done by then, and the blacked out host was.. well.. blacked out. > > Since February 2020 I have had MaxBackups set at 1, and the blackout > period for all the clients set at Monday-Saturday from 07:30 to 23:30. > This seems more or less identical to your setup yet I've never seen > the symptoms you describe. It was a fresh V4 install. > No, that's not identical. If all of your hosts have the same blackout period, then none of them can stomp on the blackout periods of other hosts. And obviously your entire collection of hosts can be backed up in that period of time. Mine can't.
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