There is a minor bug fix in trunk now that makes the "noatime" and
"nodiratime" mount options work correctly on PVFS. We have had support
for this option for a long time but it has not work correctly on recent
kernels at least.
To test it out, I tried recursively grepping through about 1000 files on
a single server configuration on my laptop. Mounting with "-o noatime"
now speeds up that operation by about 25%.
The reason for the performance benefit is that noatime lets PVFS skip
sending a setattr request (and berkeley db update) to set the access
time field every time a file is closed.
-Phil
_______________________________________________
Pvfs2-developers mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-developers
