[Lustre-discuss] Performance drop (1.6.5 vs 1.6.4.3, OFED 1.2)?

[Johann Lombardi]

On Fri, Oct 17, 2008 at 05:49:43PM -0700, Mike Bui wrote:
> I have Lustre 1.6.5.1 and want to downgrade to Lustre 1.6.4.3 for better
> performance, how would I do this ?  Please advise.

If you are not using quotas, there should be no problems to downgrade.

However, I *suspect* that you will achieve the same results with 1.6.5.1 if you
disable LRU resize (on a live system, see my previous email, or at configure
time by using --disable-lru-resize). Please also note that:
* checksumming is disabled by default in 1.6.4* whereas it is enabled in 1.6.5.1
  (see bug 13805 for more details).
* the performance drop was only noticed with a single stream.

Johann