On Wednesday, September 15, 2010, Andreas Dilger wrote: > On 2010-09-15, at 13:32, Brock Palen wrote: > > Thanks that is great to know. Is there much risk to try with 1.8 and > > then back off to 1.6 if there are issues? Risk of data loss? > > We do not test/support formatting at a higher Lustre version, and then > downgrading below the original version used for formatting. With 1.6->1.4 > this definitely did not work, though I'm not sure if there are specific > incompatibilities between 1.8->1.6.
I go back and forth from 1.8 to 1.6 quite often. The only thing to take care about is to make sure the MDS does not get the extents flag if ext4-ldiskfs is used. I think only beginning with 1.8.4 that is ensured by Lustre itself. Cheers, Bernd -- Bernd Schubert DataDirect Networks _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
