[lustre-discuss] MDT partition getting full

[Colin Faber]

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>
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> wrote:
>
> Do you have changelogs enabled?
>
> On Wed, Apr 22, 2015 at 2:14 AM, Radu Popescu <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/
>>
>> - 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
>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>>
>>
>
>
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