"Scott Marlowe" <scott.marlowe@gmail.com> writes:
> RAID5 optimizes for space, not performance or reliability. It gets
> faster but less reliable as it gets bigger. If you can afford the
> space RAID-10 is generally preferred.
RAID5 can be faster for DSS style work loads. If you're writing data to the
raid in large contiguous chunks then it you get higher bandwidth than RAID1+0.
The problem with RAID5 is that if you're writing random access chunks then
it's even slower than not having a raid at all.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
