On Wed, 16 Jan 2008 12:51:44 +0100, Pavel Machek said: > I guess I should try to measure it. (Linux already does writeback > caching, with 2GB of memory. I wonder how important disks's 2MB of > cache can be). It serves essentially the same purpose as the 'async' option in /etc/exports (i.e. we declare it "done" when the other end of the wire says it's caught the data, not when it's actually committed), with similar latency wins. Of course, it's impedance-matching for bursty traffic - the 2M doesn't do much at all if you're streaming data to it. For what it's worth, the 80G Seagate drive in my laptop claims it has 8M, so it probably does 4 times as much good as 2M. ;)
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