[sles-beta] SLES12 RC1Question concerning EMPTY_PRE_POST_CLEANUP="yes"

[urs.frey at post.ch]

Hi Arvin

Thank you for your post.

>Also, per default the cleanup algorithms only delete snapshots
>which are at least 30 minutes old.
>
>So on average empty pre-post snapshots are deleted after half a
>day, but it can take upto one day and 30 minutes.
>
>As you already wrote in a reply to my previous mail the snapshots
>are deleted after some time so everything looks OK.
I was looking to get an information telling me more about the delay to clean up empty pre-post snapshots
So even in the manpage there was nothing.

I think it could be helpful to better understanding if there were a bit more details in some documentation of manpage

Thank you very much

Urs Frey                                              
Post CH AG
Informationstechnologie
IT Betrieb 
Webergutstrasse 12 
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E-Mail:   urs.frey at post.ch


-----Ursprüngliche Nachricht-----
Von: Arvin Schnell [mailto:aschnell at suse.de] 
Gesendet: Monday, August 11, 2014 12:05 PM
An: Frey Urs, IT222
Cc: sles-beta at lists.suse.com
Betreff: Re: [sles-beta] SLES12 RC1Question concerning EMPTY_PRE_POST_CLEANUP="yes"

On Fri, Aug 08, 2014 at 09:14:42AM +0000, urs.frey at post.ch wrote:
> Hi
> When using SLES12 with btrfs I can see in /etc/snapper/configs/root the parameter EMPTY_PRE_POST_CLEANUP="yes" enabled.
> 
> I am googling, but can not find when, after which time these empty pre-post snapshots get cleaned from my server.
> I can only learn that there are three algorithms for cleanup in the cron job of snapper
> Number, Timeline, empty-pre-post

The snapper manpage mentions that the cleanup algorithms are
executed in a daily cron-job. When the daily cron-job is executed
depends on the cron configuration.

Also, per default the cleanup algorithms only delete snapshots
which are at least 30 minutes old.

So on average empty pre-post snapshots are deleted after half a
day, but it can take upto one day and 30 minutes.

As you already wrote in a reply to my previous mail the snapshots
are deleted after some time so everything looks OK.

Regards,
  Arvin

-- 
Arvin Schnell, <aschnell at suse.de>
Senior Software Engineer, Research & Development
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg)
Maxfeldstraße 5
90409 Nürnberg
Germany