While I agree with Josh that raid 5 is slower than raid10, I have over 1500 clients backing up to 8 backuppc servers running raid5 on 3ware cards (about 600GB of data on each server which is around 1TB of data from the clients). I think you need to think more about what is your load and backup window. Depending on your situation, you may not have to move to raid 10.
I went with multiple smaller servers because in my testing I found that the 3ware cards could only handle 4 streams (jobs) at a time before they crapped out and the system load skyrocketed. During testing I tried raid10, raid1, and several different file systems. Things may be different with the newer 3ware cards as I have not tested them. For a file system, I have used ext3 or reiserfs successfully (all my new installations are ext3). cheers, ski On Mon, 24 Sep 2007 08:23:47 +1000 Josh Marshall <[EMAIL PROTECTED]> wrote: > Ben Nickell wrote: > > I am creating a new filesystem for backuppc that will be about 3.4 > > Tb. It consistes of 6 750gb SATA drives in RAID 5 on 3ware raid > > controller also using LVM. (though not to span arrays, just for > > flexibility) > I strongly recommend you don't use RAID5. The read and write > performance is nowhere near as good as RAID10 and that is what > BackupPC's bottleneck is. > > Does anyone have any filesystem tuning ideas or options they used > > to create their filesystem that you think work well, particularly > > for large filesystems? If so, please share the mkfs command line > > you used to create your filesystem. > > > I use xfs on all my installations and feel that's the best mix of > performance and reliability. I use the standard mkfs.xfs but I've > read having the journal on a separate disk makes an enourmous write > speed difference. > > Regards, > Josh. > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > BackupPC-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/backuppc-users > http://backuppc.sourceforge.net/ -- "When we try to pick out anything by itself, we find it connected to the entire universe" John Muir Chris "Ski" Kacoroski, [EMAIL PROTECTED], 206-501-9803 ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
