Noah Dain wrote:
> On Feb 11, 2008 11:13 AM, Chun Kit Hui <[EMAIL PROTECTED]> wrote:
>> Dear Bruno,
>>
>> You mean that xfs will save ACLs and extended data together with the file
>> instead of meta-data? And without special configuration, Bacula will backup
>> all these "meta-data" together with the files?
>>
>> Let me have a trial later today.
>>
>> Cheers,
>> Jacky
>>
>>
>>
>> On Feb 11, 2008 10:02 PM, Bruno Friedmann <[EMAIL PROTECTED]> wrote:
>>> Chun Kit Hui wrote:
>>>> Dear Bruno,
>>>>
>>>> But how does the use of XFS help solve the problem on backup of extended
>>>> attributes using bacula?
>>>>
>>>> Jacky
>>>>
>>> XFS as this attribute inside and are perfectly saved by bacula. So they
>> are restored also as needed.
>>> You should give it a try on a xfs partition to see if you get saved and
>> restored all you need.
>>>
>>> --
>>>
>>>
>>>
>>>
>>> Bruno Friedmann [EMAIL PROTECTED]
>>>
>>> Ioda-Net Sàrl - www.ioda-net.ch
>>> 2830 Vellerat - Switzerland
>>>
>>> Tél : ++41 32 435 7171
>>> Fax : ++41 32 435 7172
>>> gsm : ++41 78 802 6760
>>>
>>> C'est Facile et Cool d'Évoluer en ligne : www.cfcel.com
>>>
>>>
>>
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>
> interesting suggestion about xfs, but according to the xfs faq:
> http://oss.sgi.com/projects/xfs/faq.html#backingupxfs
> '''
> Q: How can I backup a XFS filesystem and ACLs?
>
> You can backup a XFS filesystem with utilities like xfsdump(8) and
> standard tar(1) for standard files. If you want to backup ACLs you
> will need to use xfsdump, this is the only tool at the moment that
> supports backing up extended attributes. xfsdump can also be
> integrated with amanda(8).
> '''
> comments/clarifications about this point would be good.
>
> on the current state of linux filesystems:
>
> The xfs linux port and support/development going forward is somewhat
> doubtful. SGI has been paying the devs to do the port, but they're
> not the healthiest of companies these days. Other people could pick
> up the ball, but there's no guarantee of that of course.
>
> Yes, xfs is in the kernel so it is maintained by the kernel devs, but
> there are outstanding issues which even the xfs port team says you may
> not want to use xfs due to. There's a huge compatability layer (for
> instance), basically to interface xfs to the linux kernel (instead of
> IRIX). And there are some issues with data corruption with journal
> playback/fsck under certain circumstances.
>
> However, some of these issues have been fixed fairly recently, so you
> need to check your kernel version/patches etc. The xfs faq linked
> above hits upon many of the issues, some of them having been addresses
> only withing the last 6-12 months.
>
> reiserfs v3/4 is in a similar boat. development is pretty much
> suspended, and was never terribly popular with the core kernel devs.
>
> ext3 _really_ seems to be the safest bet these days, with ext4 in the
> future. Wasn't my first choice in filesystems for linux either, but
> it by far makes the most sense for today and going forward. It's just
> plain supported the best by far and has a very solid history.
>
> I guess the point I'm trying to make is linux has multiple filesystems
> for a reason: they're not all perfect.
>
Absolutely Noah, not perfect was our case with ext3 and reiserfs. We have huge
data ( big tiff files ) and numerous of files
that are shared by samba, with very complex acl (around 700GB). All of the day
big files are created and removed by users.
xfs is the best one to do this. (just make a test to delete a iso file under
xfs compared to ext3).
On the samba server with xfs the current load is below the 1.00. When ext3 or
reiserfs were used it's run under a 2.5/5.0 load
and make long time to respond to a long directory listing.
That's why we choose it, after running crash tests, xfs has always respond and
could recover data.
Afterall, bacula save correctly our acl and restore them. By precaution we also
have a getfacl/getfattr job running the sunday.
Just in case :-)
--
Bruno Friedmann [EMAIL PROTECTED]
Ioda-Net Sàrl - www.ioda-net.ch
2830 Vellerat - Switzerland
Tél : ++41 32 435 7171
Fax : ++41 32 435 7172
gsm : ++41 78 802 6760
C'est Facile et Cool d'Évoluer en ligne : www.cfcel.com
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