Hello, On Sun, May 16, 2010 at 01:39:30PM +0200, Sander van Vugt wrote: > On Sun, 2010-05-16 at 11:14 +0000, Andy Smith wrote: > > On Sat, May 15, 2010 at 11:23:19PM -0400, justino garcia wrote: > > > Which is faster: iSCSI to linux box over 1Gb or local SATA storage with > > > intel ICH9? > > > > You'll have to benchmark for your load, but local storage is usually > > faster than remote at least because of the lower latency. > > A simple test that I like doing to measure performance data is like: > > time dd if=/dev/zero of=/mountpoint/dummyfile bs=1M count=1024 > > That writes a 1 GB file from the /dev/zero and tells you how long it > took. I'd be interested to see the differences you measure between iSCSI > and local storage.
As a very very basic test that something isn't horribly wrong, fair enough. I would really suggest something like bonnie++ for useful benchmarks though. The problem with the above is that obviously it only measures sequential single thread throughput. Increased latency of requests is a big problem of remote/shared/virtualised storage which the above won't really expose. > Of course, I am aware that this is just one simple and limited test, but > it gives an idea anyway. bonnie++ is packaged and simple to run so there's really no excuse. :) Cheers, Andy -- http://bitfolk.com/ -- No-nonsense VPS hosting "Xandros's low-level support for the Eee mostly seemed to consist of a pile of shell scripts made of cheese and failure." -- Matthew Garrett
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