On Wed, Jan 05, 2011 at 06:28:54PM +0100, folkert wrote: > Hi, > > I have the feeling somthing is not good in my setup as it seems the > performance looks as if it can be better. > The setup: quadcore (Q9450) @ 2,1GHz with 8GB ram. > On the server I run nbd-server and nbd-client via localhost. > The nbd-server has a sparse file of 10GB in a ramdisk (tmpfs). > Now when I create an ext2 filesystem (no journal overhead) and run > iozone I get the following values: > random random bkwd > record > KB reclen write rewrite read reread read write read > rewrite > 2097152 256 601977 699077 930964 932460 928055 706410 1011458 > 814914 > Compare that with iozone directly in the ramdisk: > random random bkwd > record > KB reclen write rewrite read reread read write read > rewrite > 2097152 256 1497485 2211397 3293086 3318772 3231160 2267725 3268985 > 4805781 > > Quit a large difference isn't it?
That comparison involves nbd-server running on localhost, I presume? -- The biometric identification system at the gates of the CIA headquarters works because there's a guard with a large gun making sure no one is trying to fool the system. http://www.schneier.com/blog/archives/2009/01/biometrics.html ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Nbd-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nbd-general
