[lustre-discuss] Mount lustre client with MDS/MGS backup

[Pardo Diaz, Alfonso]

Hello,


I have a trouble mounting my lustre clients in MDS/MGS high availability. This is my scenario:

MDS1: primary MDS/MGS
MDS2: backup MDS/MGS
OSS1
OSS2
...
OSS8

I mount my clients: mount -t lustre mds1 at o2ib:mds2 at o2ib:/fs /mnt/fs

1) When both MDS are OK I can mount without problems
2) If the MDS1 is down and my clients have lustre mounted, they use MDS2 without problems
3) If the MDS1 is down and I try to mount a new client, It can’t mount lustre with the next error:

arg[0] = /sbin/mount.lustre
arg[1] = -v
arg[2] = -o
arg[3] = rw
arg[4] = 192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs
arg[5] = /mnt/fs
source = 192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs (192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs), target = /mnt/fs
options = rw
mounting device 192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs at /mnt/fs, flags=0x1000000 options=device=192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs
mount.lustre: mount 192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs at /mnt/fs failed: Input/output error retries left: 0
mount.lustre: mount 192.168.8.9 at o2ib:192.168.8.9 at o2ib:/fs at /mnt/fs failed: Input/output error
Is the MGS running?


I suspect that the new client try to mount using MDS1, but if is down, they don’t try to mount using the next MDS.



Any suggestion?


-----------------------------------------------------------------------------
Alfonso Pardo Díaz
Researcher / System Administrator CETA-Ciemat
C/Sola Nº1. 10200 - TRUJILLO, SPAIN
Teléfono. +34 927659317 (ext. 214) FAX +34 927323237

[cid:A9E2233C-3F99-40A6-B088-531EA585AD26 at ceta-ciemat.es]


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