[Lustre-discuss] Adding OSTs problem

[Cliff White]

Mag Gam wrote:
> I have added 2 volumes onto my existing filesystem.
> 
> mkfs.lustre --fsname lfs002 --ost --mgsnode=mgs01 at tcp /dev/lustrevg/lv03
> mkfs.lustre --fsname lfs002 --ost --mgsnode=mgs01 at tcp /dev/lustrevg/lv04
> 
> I even managed to mount up the OSTS (each are 2TB)
> 
> However, on the clients we don't see the extra 4TB.
> 
> I am not sure whats going on.
> 
> 
> On the OST:
> I can see the new OSTs mounted up properly
> 
> /proc/fs/lustre/obdfilter/lfs002* I see the mounted filesystem device
> on mntdev in the /proc/filesystem
> 
> I even managed to reboot the MDS and OSS and the clients still no go.
> I **think** on my MDS I see the new OSS too, just not on the clients.
> 
> Is there anything I should be looking at?

first, tunefs.lustre --print on the OST to be certain you have the 
fsname set correctly ( i think it needs to be --fsname= )

Second, 'lctl dl' on the MDS should show you a connection to the new 
OSTs. If not, the MGS hasn't registered them with this filesystem.
# lctl dl

   3 UP mds test1-MDT0000 test1-MDT0000_UUID 5
...
   5 UP osc test1-OST0001-osc test1-mdtlov_UUID 5


'lctl dl' on the OST should show an MGC connection
# lctl dl
   0 UP mgc MGC10.67.73.150 at tcp 92778f8e-f7e6-0327-e433-63d230eea1a9 5
   1 UP ost OSS OSS_uuid 3
   2 UP obdfilter test1-OST0001 test1-OST0001_UUID 7


Check the OST log, there should be a 'recieved MDS connection from....'
message if you were registered correctly.
/var/log/messages.2:Mar  2 11:17:24 d1c2 kernel: Lustre: test1-OST0001: 
received MDS connection from 10.67.73.151 at tcp


New OSTs should be automatically recognized by the clients, and 'lctl 
dl' on the clients should show the new OSTs.

cliffw

> 
> TIA
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss