From: Tino S. <bac...@ti...> - 2009-09-07 12:51:17
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On Sat, Sep 05, 2009 at 06:52:35PM -0600, dan wrote: [...] > You make a lot more sence here, but I think you overestimate CPU usage. > backuppc is so IO bound that after your get a 2Ghz+ Dual core and 2GB RAM > you can pretty much blame your disks for slow performance. I have a dual > core 2Ghz Opteron with 2GB of ram and 8 drives in a linux raid10 and hard > disk speed is still my bottleneck. I run 4 concurrent backups on that > machine and it does give high system load numbers but still handles the > desktops in the office faster than 3 concurrent while 5 concurrent takes > quite a bit longer to complete. filesystem choice and io scheduler do make a > difference but faster disks is the only real cure. I'd add some memory first. 4GB is so cheap these days and it helps a lot for disk caching. I've seen a performance boost by upgrading from 2 GB to 6 GB on a quad core Xeon which is also heavily I/O bound.oO(I've got to switch to RAID-10, the RAID-5 really kills performance...) Tino. -- "What we nourish flourishes." - "Was wir nähren erblüht." www.lichtkreis-chemnitz.de www.craniosacralzentrum.de |