[Lustre-discuss] osc lost on MDS server

[Antonio Concas]

I had a similar problem,
after a reconfiguration, running tunefs.lustre ost I got a kernel panic,
I solved using fsck on the ost damaged.

Antonio



Lu Wang ha scritto:
> 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
>     6. mount all osts
> 	
> 	we can see 7 the osc devices on a mounted client, but only 2/7 osc devices on MDS. When I create a file with 7 stripe, the MDS server crashed. Any ideas?
> 	 lctl dl 
>   0 UP mgs MGS MGS 707
>   1 UP mgc MGC192.168.50.50 at tcp 43fc0787-3580-ce63-5019-94a7903f2fb0 5
>   2 UP mdt MDS MDS_uuid 3
>   3 UP lov besfs2-mdtlov besfs2-mdtlov_UUID 4
>   4 UP mds besfs2-MDT0000 besfs2-MDT0000_UUID 803
>   5 UP ost OSS OSS_uuid 3
>   6 UP obdfilter besfs2-OST0000 besfs2-OST0000_UUID 803
>   7 UP obdfilter besfs2-OST0001 besfs2-OST0001_UUID 805
>   8 UP osc besfs2-OST0001-osc besfs2-mdtlov_UUID 5
>   9 UP obdfilter besfs2-OST0002 besfs2-OST0002_UUID 805
>  10 UP osc besfs2-OST0002-osc besfs2-mdtlov_UUID 5
>
>     This is a small lustre installation. We have only 2 server, there are 3 OSTs and 1 MDT/MGS on one server, 4 OSTs on the other server.  The lustre version is :   2.6.9-67.0.22.EL_lustre.1.6.6smp on x86-64.
>
> Best Regards
> Lu Wang
>
>