Yann Cézard wrote:
> Kevin Keane a écrit :
>> If my math is right, the 12th is the 13th day of the retention
>> period. Since the previous job finished at 22:43, and your new job
>> started at 22:38, the rentention period hadn't elapsed yet, by about
>> five minutes. The reason it sometimes works and sometimes doesn't is
>> simply the timing between the jobs.
> Actually, I don't agree with your maths, sorry :)
> The 12th was the 14th day of the retention period.
> 29th 22:43:13 => start of retention, day/hour 0
> 30th 22:43:13 => 1st day
> 31th 22:43:13 => 2nd day
> 1st 22:43:13 => 3rd day
> 2nd 22:43:13 => 4th day
> ...
> 11th 22:43:13 => 13th day : job could be pruned, and then the volume
> 12th 22:38 => job is still there, volume is still not recycled ???
>
> So basically it looks more like a Job pruning problem ?
Oops. I think you are right. What are the volume, job and file retention
times? I didn't see those two values in the tables you sent earlier;
maybe I missed it. The only retention time I saw was the one for the
pool - which really has no direct effect at all here. Maybe one of the
files still had an unexpired retention time? In that case, the job won't
get purged even if the job itself has passed its retention time.
Similarly, if the job retention time is longer, the volume won't get
purged even if its retention time has passed.
>> As you back up larger jobs, this problem is going to get worse. You
>> really need more than 12 volumes for a 13 day retention period.
> I have 14 volumes : 2 full (1 day per week) + 12 incremental
> (6 days per week).
> So even if the job stopped one day after schedule (I limit
> the job to 20 hours by the way), when the "two week after"
> job should takes place (should it be Full or Incr), the volume
> should already have been recycled.
> That's why I choosed this 13 days Retention time, and not 14.
>
> Or perhaps I am wrong and don't understand some basic thing here ?
I think you have to look at the incremental and full pools separately.
You have 13 days, and you have effectively 13 incremental volumes to
work with (one of them is virtual because you are not using up an
incremental volume on the day you did the full backup). That means that
on some days, you will run into this timing problem.
>> Personally, I would suggest you consider letting Bacula automatically
>> label volumes as needed. Also, with bi-weekly backups, you may want
>> to consider 15 days instead of 13 days as your retention period.
>> Otherwise, bacula has to delete an older backup just before doing the
>> next one, and you'd be left with just one backup on your disk. If
>> that is somehow corrupted, you'd have a problem.
>>
> I know that, but that's a choice that I have made, I should restrict
> the size of backups that I have (more than 6To actually, keeping one
> more Full Jobs would mean about 9To...).
Wow. That's pretty big. I didn't check in your original post, but is it
possible that some of the full backups take more than 24 hours? That
might throw off the schedule, too.
--
Kevin Keane
Owner
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