[Lustre-discuss] missing ost's?

[Timh Bergström]

As long as the inode-discussion is up, two questions; what exactly is
stored in the inode (how big should i make them) I've read the manual
about this and it doesnt really say except the notation about
stripes/osts.

Is there a "proper" way of "moving" or recreating the mdt-filesystem
to hold more inodes or is it backup -> reformat -> restore procedure
that is the proper way?

Sorry to hijack your thread.

Regards,
Timh

2009/6/17 Mag Gam <magawake at gmail.com>:
> do you have many small files?
>
>
>
> On Tue, Jun 16, 2009 at 8:58 PM, Michael Di
> Domenico<mdidomenico4 at gmail.com> wrote:
>> On Tue, Jun 16, 2009 at 8:25 PM, Michael Di
>> Domenico<mdidomenico4 at gmail.com> wrote:
>>> I have a small lustre test cluster with eight OST's running.  The
>>> servers were shut off over the weekend, upon turning them back on and
>>> trying to startup lustre I seem to have lost my OST's.
>>>
>>> [root at node1 ~]$ lctl dl
>>>  0 UP mgs MGS MGS 19
>>>  1 UP mgc MGC192.168.1.254 at tcp 8acd9bf1-d1ca-8e26-1fad-bd2cf88a2957 5
>>>  2 UP mdt MDS MDS_uuid 3
>>>  3 UP lov lustre-mdtlov lustre-mdtlov_UUID 4
>>>  4 UP mds lustre-MDT0000 lustre-MDT0000_UUID 3
>>>  5 UP ost OSS OSS_uuid 3
>>>  6 UP obdfilter lustre-OST0000 lustre-OST0000_UUID 3
>>>
>>> Everything in the messages log appears to be fine as if it was just a
>>> normal startup of lustre, except for the below message.  I'm not sure
>>> what logfile the error is referring to, and the message gives little
>>> detail on where i should start looking for an error.
>>>
>>> Jun 16 20:13:55 node1-eth0 kernel: LustreError:
>>> 3106:0:(llog_lvfs.c:577:llog_filp_open()) logfile creation
>>> CONFIGS/lustre-MDT0000T: -28
>>> Jun 16 20:13:55 node1-eth0 kernel: LustreError:
>>> 3106:0:(mgc_request.c:1086:mgc_copy_llog()) Failed to copy remote log
>>> lustre-MDT0000 (-28)
>>
>> Apparently from the lustre manual the -28 at the end of the line is an
>> error code, which points to
>>
>> -28 -ENOSPC The file system is out-of-space or out of inodes. Use lfs df
>> (query the amount of file system space) or lfs df -i
>> (query the number of inodes).
>>
>> verified by
>>
>> [root at node1 ~]$ df -i
>> Filesystem            Inodes   IUsed   IFree IUse% Mounted on
>> /dev/md2             1280000   42132 1237868    4% /
>> /dev/md0              255232      45  255187    1% /boot
>> tmpfs                 124645       1  124644    1% /dev/shm
>> /dev/md3               63872      24   63848    1% /mgs
>> /dev/md4              255040  255040       0  100% /mdt
>> /dev/md5             29892608   28726 29863882    1% /ost
>>
>> I only put 500k files in the filesystem i would not have thought the
>> mdt would have used up the inodes that fast
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-- 
Timh Bergström
System Operations Manager
Diino AB - www.diino.com
:wq