[gpfsug-discuss] afmRefreshAsync questions

[Venkateswara R Puvvada]

Hi,

Both storage and client clusters  have to be on 5.0.3.x to get the AFM 
revalidation performance with afmRefreshAsync. What are the refresh 
intervals ?, you could also try increasing them. Is this config option set 
at fileset level or cluster level ?

~Venkat (vpuvvada at in.ibm.com)



From:   Andreas Mattsson <andreas.mattsson at maxiv.lu.se>
To:     GPFS User Group <gpfsug-discuss at spectrumscale.org>
Date:   09/26/2019 03:26 PM
Subject:        [EXTERNAL] [gpfsug-discuss] afmRefreshAsync questions
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hi,
Due to having a data analysis software that isn't running well at all in 
our AFM caches, it runs 4-6 times slower on an AFM cache than on a non-AFM 
fileset on the same storage system, I wanted to try out the 
afmRefreshAsync feature that came with 5.0.3 to see if it is the cache 
data refresh that is holding things up.
Enabling this feature has had zero impact on performance of the software 
though.

The storage cluster is running 5.0.3.x, and afmRefreshAsync has been set 
there, but at the moment the remote-mounting client cluster is still 
running 5.0.2.x.
Would this feature still have any effect in this setup?

Regards,
Andreas Mattsson

____________________________________________


Andreas Mattsson
Systems Engineer
 
MAX IV Laboratory
Lund University
P.O. Box 118, SE-221 00 Lund, Sweden
Visiting address: Fotongatan 2, 224 84 Lund
Mobile: +46 706 64 95 44
andreas.mattsson at maxiv.lu.se
www.maxiv.se
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