[gpfsug-discuss] gpfs and device number

[Lukas Hejtmanek]

Hello,

I noticed that from time to time, device id of a gpfs volume is not same
across whole gpfs cluster.

[root at kat1 ~]# stat /gpfs/vol1/
  File: ‘/gpfs/vol1/’
  Size: 262144    	Blocks: 512        IO Block: 262144 directory
Device: 28h/40d	Inode: 3 

[root at kat2 ~]# stat /gpfs/vol1/
  File: ‘/gpfs/vol1/’
  Size: 262144    	Blocks: 512        IO Block: 262144 directory
Device: 2bh/43d	Inode: 3 

[root at kat3 ~]#  stat /gpfs/vol1/
  File: ‘/gpfs/vol1/’
  Size: 262144    	Blocks: 512        IO Block: 262144 directory
Device: 2ah/42d	Inode: 3

this is really bad for kernel NFS as it uses device id for file handles thus
NFS failover leads to nfs stale handle error. 

Is there a way to force a device number?

-- 
Lukáš Hejtmánek

Linux Administrator only because
  Full Time Multitasking Ninja 
  is not an official job title