Performance drop in iozone for reading large files

[J. Bruce Fields]

On Fri, Aug 25, 2006 at 05:41:14PM -0400, Trond Myklebust wrote:
> On Fri, 2006-08-25 at 17:27 -0400, J. Bruce Fields wrote:
> > On Fri, Aug 25, 2006 at 05:23:37PM -0400, Trond Myklebust wrote:
> > > Is the readahead algorithm working correctly? Could you please try
> > > applying the following patch, and then check your syslog for warnings?
> > 
> > So what does iozone do to eliminate the effect of caching here, anyway?
> 
> You can ask it to unmount, then remount the entire NFS partition before
> each test.

OK, makes sense, I'm an idiot.

--b.