On Wed, 27 Feb 2008, John Pettitt wrote: > So my take - if your box is swapping that's the #1 upgrade because that > will kill any server performance and memory is cheap. Next I'd look at > disk, with the right controller more spindles will give you a > performance boost however raid 5 is not a great way to go because of the > cost of doing write splices.
(Mostly) agreed. If you can afford a hardware raid controller, raid 5 is a good choice. If money is no object, 3ware cards are great, but they're not the only choice. My backups are running on a couple of older SCSI <-> xATA HW raid controllers (Arena and Promise) and they work great because the parity computation is handled by the raid's processor rather than the server's. My bottleneck right now is still disk, but I can do 4 simultaneous backups on a dual 2.8 xeon HT w/ 2.5 GB of RAM (CPU and RAM are both probably overkill) before hitting it. > Lastly CPU unless you are running with a load average close > to or greater than the # of cpu's it's probably not going to gain you much. CPU seems to have a larger correlation with the number of clients you can handle at once. In my experience it's not a great idea to ask the server to handle much more than one client per CPU core; your mileage may vary depending on what your CPU core(s) and transfer method are though. Cheers, Stephen -- Stephen Joyce Systems Administrator P A N I C Physics & Astronomy Department Physics & Astronomy University of North Carolina at Chapel Hill Network Infrastructure voice: (919) 962-7214 and Computing fax: (919) 962-0480 http://www.panic.unc.edu Don't judge a book by its movie. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
