Performance drop in iozone for reading large files

[J. Bruce Fields]

On Fri, Aug 25, 2006 at 02:01:22PM -0700, Bryce Harrington wrote:
> Does anyone have an idea why the dropoff is occuring?  Is the memory
> size expected to affect NFS performance this way?

Yes, definitely; it can answer the reads out of the client's cache, as
long as the file is small enough to fit in the client's memory.

(What exactly is it testing in this case?  I don't really know what
iozone does.  Bad me.)

--b.