[Lustre-discuss] Interoperable issues between 1.8.6 and 2.1

[chas williams - CONTRACTOR]

On Wed, 22 Aug 2012 21:00:17 -0400
Ken Hornstein <kenh at cmf.nrl.navy.mil> wrote:

> >I am not finding where it says explicitly that a lustre client running
> >1.8 will successfully be able to read and write to a set of lustre
> >servers running lustre 2.1. are there any known issues?
> 
> I forget where that was written down; I can report that it works fine.
> WITH THE EXCEPTION of ia64 1.8-based clients; that totally doesn't work.

when i looked at this briefly i believe the problem was that the ia64
was fetching a page size (16k for the ia64) from the MDS.  the 2.x
MDS replies with a 4k page and the ia64 client thinks this a short
read.  this wouldnt be hard to fix for the ia64 but didnt seem like it
was worth the trouble.