Hey Owen, all, I find this one handy if you have root access:
http://linux-mm.org/Drop_Caches echo 3 > /proc/sys/vm/drop_caches Drops the pagecache, dentries, and inodes. Without this, you can still get caching effects doing the normal "read and write large files" if the linux pagecache outsmarts you (and I don't know about you, but it often outsmarts me...). Brian On Jun 14, 2010, at 9:35 AM, Owen O'Malley wrote: > Indeed. On the terasort benchmark, I had to run intermediate jobs that > were larger than ram on the cluster to ensure that the data was not > coming from the file cache. > > -- Owen
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