[Lustre-discuss] Replacing an MDT

[Brian J. Murrell]

On Fri, 2009-03-20 at 13:22 -0400, Ms. Megan Larko wrote:
> 
> Mar 20 12:39:40 mds1 kernel: Lustre: MDT crew8-MDT0000 now serving dev
> (f8a0e9b5-c2f1-8297-4ead-e34c9680b3cf) with recovery enabled
> Mar 20 12:39:40 mds1 kernel: Lustre: Server crew8-MDT0000 on device
> /dev/METADATA2/LV2 has started
> Mar 20 12:39:40 mds1 kernel: LustreError: 11-0: an error occurred
> while communicating with 192.168.64.215 at o2ib. The ost_connect
> operation failed with -114

114 == Operation already in progress

Strange.

> 3460:0:(llog_lvfs.c:597:llog_lvfs_create()) error looking up logfile
> 0xa65662:0x9c30d2f6: rc -2

Oh.  A file is missing.

> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(osc_request.c:3446:osc_llog_init()) failed
> LLOG_MDS_OST_ORIG_CTXT
> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(osc_request.c:3457:osc_llog_init()) osc 'crew8-OST0000-osc'
> tgt 'crew8-MDT0000' cnt 1 catid ffffc200050f8000 rc=-2
> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(osc_request.c:3459:osc_llog_init()) logid 0xa65662:0x9c30d2f6
> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(lov_log.c:214:lov_llog_init()) error osc_llog_init idx 0 osc
> 'crew8-OST0000-osc' tgt 'crew8-MDT0000' (rc=-2)
> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(mds_log.c:207:mds_llog_init()) lov_llog_init err -2
> Mar 20 12:39:40 mds1 kernel: LustreError:
> 3460:0:(llog_obd.c:392:llog_cat_initialize()) rc: -2
> Mar 20 12:40:05 mds1 kernel: LustreError: 11-0: an error occurred
> while communicating with 192.168.64.215 at o2ib. The ost_connect
> operation failed with -114
> Mar 20 12:40:05 mds1 kernel: LustreError: Skipped 4 previous similar messages

Seems like maybe your backup/restore was not successful.

> Should I just copy or rsync specific files from the smaller
> crew8-MDT0000 to the new, largre crew8-MDT0000?

Well, if they are both physically mountable at the same time, an rsync
is what I would have chosen over doing a backup/restore process.  Be
sure to make sure you use (amongst others) the -X argument for rsync to
get the EAs.

b.

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