[Lustre-discuss] osc lost on MDS server

[huangql]

Hi, dearlist

We have done the steps from 1 to 5, but we can still only see 2/7 osc devices on the MDS, but we can see 7 osc devices on a mounted client. Then we run e2fsck on the osts, However, we get the same result.

And we had the problem, after we do the step 1 to 4  and umount the filesystem from ldiskfs, then run the step 5, we got the logs:
According to the logs, we have no idea why there are 63 clients and where the MDS get the clients information with we removing CONFIGS/* and linking down.

Nov 12 09:02:37 beshome01 kernel: Lustre: 2474:0:(mds_fs.c:493:mds_init_server_data()) RECOVERY: service besfs2-MDT0000, 63 recoverable clients, last_transno 118077355
Nov 12 09:02:37 beshome01 kernel: Lustre: MDT besfs2-MDT0000 now serving dev (besfs2-MDT0000/5ceb6ad6-e810-9fae-4862-8ed0913bf7e7), but will be in recovery for at least 5:00, or until 63 clients reconnect. During this time new clients will not be allowed to connect. Recovery progress can be monitored by watching /proc/fs/lustre/mds/besfs2-MDT0000/recovery_status.
2009-11-12 



huangql 



发件人： Andreas Dilger 
发送时间： 2009-11-12  06:19:53 
收件人： Lu Wang 
抄送： lustre-discuss 
主题： Re: [Lustre-discuss] osc lost on MDS server 
 
On 2009-11-11, at 05:59, Lu Wang wrote:
> Dear  list,
>  Our MDS losts 5/7 osc devices after a reconfiguration:
>  1.umount all osts
>  2.tunfs.lustre --writeconf --mgs --mdt /dev/sda1
>  3.mount -t ldiskfs mdtdevice mountpoint
>  4.rm CONFIGS/*
>  5.mount -t lustre mdtdevice mountpoint
Where is it documented to delete all of the files in CONFIGS?
This deletes the action of step #2 above, and isn't a good idea.
Presumably there was also a step 4b to unmount the filesystem
from type lfdiskfs?
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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