[systemd-devel] Scheduling 3 periodic jobs using systemd

[t.schneider at disroot.org]

Could you please explain the idea behind this proposal?

Am 2024-07-12 11:53, schrieb Barry Scott:

>> On 12 Jul 2024, at 09:50, t.schneider at disroot.org wrote:
>> 
>> There's no script (or whatsoever) in this backup functionality.
>> It's only rsnapshot [1] (https://wiki.archlinux.org/title/Rsnapshot) 
>> and systemd-timer [2] involved.
> 
> You can change the ExecStart= to use flock, see man flock for details.
> 
> Off the top of my head something like:
> ExecStart=flock --exclusive mylock rsnapshot
> 
> Add in full paths to make it robust.
> 
> Barry
> 
> Am 2024-07-12 10:35, schrieb Barry Scott:
> 
> On 12 Jul 2024, at 08:34, t.schneider at disroot.org wrote:
> 
> Setting the time of day requires detailed knowledge about the runtime 
> of each job.
> 
> But this forecast is not accurate and this means any setting could 
> result in same error.
> 
> Agreed that is a problem with this approach.
> 
> Or you have the code that locks wait for the lock to be freed does that 
> help?
> Are you using flock in the script, then its a easy change.
> 
> You still cannot ensure the order, but you can ensure that they will 
> all run sequentially.
> 
> Personally I encode the rules for my incremental vs. full backup into 
> my hourly backups script.
> So I only have one timer.
> 
> Barry


Links:
------
[1] https://wiki.archlinux.org/title/Rsnapshot
[2] https://wiki.archlinux.org/title/Systemd/Timers
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/systemd-devel/attachments/20240712/b308a6d9/attachment.htm>