On 2012-01-10 14:19, Bruno Friedmann wrote:
>>
> 
> First of all, I'm using also xfs on data source and/or backup media.
> There's no special trouble on them to get incremental/differential backup.

thanks for your detailed answer.
i'm glad to hear that no troubles are to be expected in general. so not
all is lost...

> What I suspect could be : an antivirus or any other scripts running on the 
> xfs partition that change attribute or acl on files

good guess but unfortunately unlikely...or rather: the only script that
_is_ run and might update attributes is "mlocate.update"

> It will be better for you have 5.0.3 or wait until 5.2.4 release version.

if i knew this would help, it might be an option.
until i know the cause of the problem, i'd rather stick with stock
debian packages (even if it means slightly outdated packages). i'm aware
that this is usually not what people want to hear on application
specific mailinglists, where a lot of work is put into making the latest
release as stable and bug-free as possible :-)

> 
> Check also the parameter used for your incremental (did you use Accurate 
> Backup?)

i might have to re-read the manual to understand what you mean by
"Accurate Backup". obviously i have read the manual to configure bacula
correctly for my needs back-then (using an old version of bacula & OS
and a different filesystem). since truths keep shifting, i might have to
refresh my knowledge...

> If the filesystem xfs is not mounted with the noatime option, check to have 
> noatime option in the bacula job.
> so it will not change each file during the full backup, then creating a new 
> fool backup for the incremental.

that is a very good point.
# cat /proc/mounts
/dev/vda /Net/data xfs rw,relatime,attr2,nobarrier,noquota 0 0

so the xfs-attribute "noatime" is not set (thought "relatime" is).
and the the bacula fileset misses the "noatime=yes" as well.

i will add "noatime=yes" to the fileset and see whether this helps....


mfgasdr
IOhannes



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IEM - network operation center
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