[Lustre-discuss] 1.6.4.2 -> 1.8.0.1 rolling upgrade?

Andreas Dilger adilger at sun.com
Fri Jul 24 15:22:33 PDT 2009


On Jul 24, 2009  14:10 -0400, Craig Prescott wrote:
> We're interested in doing a rolling upgrade of the Lustre servers for 
> one of our production filesystems from 1.6.4.2 to 1.8.0.1.  We have one 
> MDS/MGS, and two OSS, no failover.
> 
> Rather than upgrade all the server machines at once, we're considering 
> upgrading one machine per day:
> 
> * day 1: upgrade MDS/MGS
> * day 2: upgrade OSS1
> * day 3: upgrade OSS2
> 
>  From the 1.8 operations manual (chapter 13), it seems like this should 
> be fine to do.  Are there any "gotchas" involved with running a 
> combination of 1.6 and 1.8 servers together?

In theory, no, but we generally test upgrading the servers together.

Generally there isn't an admin issue for upgrading servers at one
time, and clients at some other time, so we don't test every combination
of MDS/OSS/client.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.




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