[Lustre-discuss] Failover Setup MDS/MDT

[Heiko Schroeter]

Hello,

the docs state for a failover setup that the MDS and MDT should be on seperate 
nodes.

Therefore we would like to know what a "good" scenario could be. Does it make 
sense or is it even possible to setup a MDS with failover capabilities, i.e. 
something like (mirrored with DRBD here for example):

On MDS1LUSTRE:
mkfs.lustre --fsname=foo --mgs --failnode=MDS2LUSTRE /dev/drbd0

On MDT1LUSTRE:
mkfs.lustre --fsname=foo --mdt --failnode=MGS2LUSTRE /dev/drbd0

That counts for 4 machines. 
Would that be a feasible setup or is it just overkill besides the costs ?

What would be the proper setup scenario if the above is not possible ? 
(Avoiding a single point of failure for the MDS)



Thanks and Regards
Heiko