On Mon, Sep 14, 2009 at 11:42:42AM -0700, James Ward wrote:
I'm setting up a new BackupPC server as my current one has gotten
full. This system has 2G RAM, quad Intel(R) Xeon(TM) CPU 3.20GHz and
a 3ware 6.5T array. I believe the array is currently RAID5 with no
hot spare. From what I'm reading, RAID5 is a no-no as is ext3?
What is the best way to set up the RAID array for BackupPC?
The array for BackupPC should be tuned for access time, mostly.
Therfore: As much disk heads as possible, disks as fast as possible.
If you want to use few big disks, go for RAID-10 since it does not
suffer the write-performance-impact of RAID-5. If you aim for more
disks (like 10), you might want to use RAID-5 or -6.
I've got a RAID-5 with only 3 disks and I'm regretting it a lot (just
didn't find the time to buy that 4th disk and migrate to RAID-10 - I'll
report if I did the move and what the results were).
Also, ext3 doesn't seem to be a good choice. XFS and ZFS are
recommended. (But ZFS is Solaris-only and needs lots of memory and CPU
power itself.)
Oh, BTW, consider upgrading RAM. It's very, very cheap these days and
helps a lot for having the OS cache metadata (directories etc.).
HTH,
Tino.
--
"What we nourish flourishes." - "Was wir nähren erblüht."
www.lichtkreis-chemnitz.dewww.craniosacralzentrum.de
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