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

Craig Prescott prescott at hpc.ufl.edu
Fri Jul 24 11:10:12 PDT 2009


Hi;

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?

Thanks,
Craig Prescott
UF HPC Center







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