On Mar 18, 2011, at 1:07 AM, DEGREMONT Aurelien wrote:
>>>> Those clients do a lot of read and write in Lustre filesystems but >>>> thoses files will not be re-read soon, so it is useless to fill memory >>>> with it. Moreover, when the client memory is full, Lustre performance >>>> are really impacted. >>>> >>> It may be possible to use fadvise(FADV_NOREUSE) from the application to >>> cause the VM to discard these pages after the first use. >>> >> Yes, that would totally make sense to do regardless of other methods. >> > > Hmm... I do not want to patch 'cp' or 'dd' :) You might want to have a look at this: http://code.google.com/p/pagecache-mangagement/ We use it when copying crash dumps off of our OSSes, as we don't want to disturb cached metadata. Jason -- Jason Rappleye System Administrator NASA Advanced Supercomputing Division NASA Ames Research Center Moffett Field, CA 94035 _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
