[Lustre-discuss] lustre interoperability

[Andreas Dilger]

On Oct 18, 2007  10:49 -0400, Jerome, Ron wrote:
> Could somebody (Andreas maybe :) give a definitive answer on this...
> 
> > > Having said that, I believe 1.6.0 and 1.6.3 is actually something
> that
> > > will work, but I'm not 100% certain of this, so I'll allow others to
> > > correct me.
> 
> ... as I would like to do just this, go from 1.6.0.1 to 1.6.3 and would
> rather not have to go through the intermediate versions if I don't have
> to.

I'm not aware of any incompatibilities between 1.6.0 and 1.6.3, and we
have a good mechanism to handle protocol negotiation when we add features
to Lustre (since 1.4.2).  That said, we can't possibly do an all-to-all
test matrix, so we only test against the previous minor version (1.6.3
against 1.6.2) and the upgrade from the most recent major version (1.4.12).

There have been no changes to the on-disk format since 1.4 days (excluding
the config logs) that I'm aware of.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.