[Lustre-discuss] lustre failover pairs

[John White]

Good Morning Folks,
	A quick question on lustre failover as far as OSSs are concerned.   
Can failover pairs be in an (for lack of a better phrase) active- 
active setup?  I have a GPFS background where we would have NSDs  
(OSTs) split between two servers -- half the NSDs would be primarily  
served by one server, the other half on the other server.  In the case  
of a failover, one server would take over all NSDs until such time as  
the primary was back in production.

Looking at the lustre docs, it looks like this is not the standard  
operating procedure.  Rather, it looks like a "active-passive" setup  
where one OSS owns all the OSTs and the failover is more a warm spare  
ready to kick into action when a failure occurs but not serving any  
data requests while in full production.  Is this a correct analysis of  
the lustre side of things?
----------------
John White
HPC Systems Engineer
(510) 486-7307
One Cyclotron Rd, MS: 50B-3209C
Lawrence Berkeley National Lab
Berkeley, CA 94720