[lustre-discuss] MDT partition getting full

[Radu Popescu]

From the server:

mount -t lustre
/dev/mapper/vgsrv6-lvsrv6_mgs on /mnt/mgs6 type lustre (rw)
/dev/mapper/vgsrv6-lvsrv6_mdt on /mnt/mdt_fssrv6 type lustre (rw)
/dev/mapper/vgsrv6-lvsrv6_ost on /mnt/ost_fssrv6 type lustre (rw)

From a client:

lfs df -hi | grep -i fssrv6
fssrv6-MDT0000_UUID        39.1M        1.2M       37.9M   3% /mnt/volumes/5[MDT:0]
fssrv6-OST0001_UUID         4.6M        1.2M        3.4M  26% /mnt/volumes/5[OST:1]

lfs df -h | grep -i fssrv6
fssrv6-MDT0000_UUID        58.6G       30.6G       24.1G  56% /mnt/volumes/5[MDT:0]
fssrv6-OST0001_UUID        77.0G       12.3G       60.7G  17% /mnt/volumes/5[OST:1]


> On 23 Apr 2015, at 00:32, Alexander I Kulyavtsev <aik at fnal.gov> wrote:
> 
> Before you remounted as ldiskfs, what is the output of
>   mount -t lustre
>   lfs df -hi
>   lfs df -h
> 
> the first command is to verify fs is actually mounted as lustre.
> Alex.
> 
> On Apr 22, 2015, at 4:23 PM, Colin Faber <cfaber at gmail.com <mailto:cfaber at gmail.com>> wrote:
> 
>> You could look at your MDT partition directly, either unmount it and remount as ldiskfs and examine where your space is going, or use debugfs to do the same, with it mounted.
>> 
>> 
>> On Wed, Apr 22, 2015 at 11:57 AM, Radu Popescu <radu.popescu at amoma.com <mailto:radu.popescu at amoma.com>> wrote:
>> Hi,
>> 
>> changelog is not enabled. I’ve checked /proc/fs/lustre/mdd/NAMEOFMDT/changelog_users and got:
>> 
>> current index: 0
>> ID    index
>> 
>> Thanks,
>> Radu
>> 
>> 
>>> On 22 Apr 2015, at 19:52, Colin Faber <cfaber at gmail.com <mailto:cfaber at gmail.com>> wrote:
>>> 
>>> Do you have changelogs enabled?
>>> 
>>> On Wed, Apr 22, 2015 at 2:14 AM, Radu Popescu <radu.popescu at amoma.com <mailto:radu.popescu at amoma.com>> wrote:
>>> Hi,
>>> 
>>> I have the following Lustre setup:
>>> 
>>> - servers
>>> - number: 9
>>> - Lustre version: 2.5.3
>>> - OS: CentOS 6.6
>>> - RPM URL: https://downloads.hpdd.intel.com/public/lustre/lustre-2.5.3/el6/server/RPMS/ <https://downloads.hpdd.intel.com/public/lustre/lustre-2.5.3/el6/server/RPMS/>
>>> 
>>> - clients
>>> - number: 90
>>> - Lustre version: 2.5.56
>>> - OS: Debian Wheezy
>>> - Packages were manually created from sources
>>> - all clients have all 9 Lustre mountpoints
>>> 
>>> Lustre setup:
>>> 
>>> MGS + MDT + OST all stay on a single LUN which has a VG (160GB) created and 3 LVs for each of the partitions, all mounted on each server:
>>> 
>>> MGS - 4GB
>>> MDT - 78.12GB
>>> OST - 78.14GB
>>> 
>>> (I’ve chosen a comparable size for MDT and OST because of the small file size)
>>> - Total number of files is at around 16 million, sizes between <1K and 1.7MB. They are not equally spread on all mountpoints so let’s say I have a 2M maximum number of files on a Lustre volume.
>>> 
>>> My problem is that MDT partition is getting full. Inodes are fine, only 3% used, which is ok, but the space used is > 50% used, and constantly dropping. So I think that within a week, I’ll be out of storage on all MDT partitions. And I didn’t specify any special options when creating MDT partitions, so bytes per inode should be at 16K (default setting).
>>> 
>>> Anyone has any ideas?
>>> 
>>> Thanks,
>>> Radu
>>> 
>>> _______________________________________________
>>> lustre-discuss mailing list
>>> lustre-discuss at lists.lustre.org <mailto:lustre-discuss at lists.lustre.org>
>>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org <http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org>
>>> 
>>> 
>> 
>> 
>> _______________________________________________
>> lustre-discuss mailing list
>> lustre-discuss at lists.lustre.org <mailto:lustre-discuss at lists.lustre.org>
>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/attachments/20150423/f31e9fc2/attachment-0001.htm>