[CentOS] 4.4/64-bit Supermicro/ Nvidia RAID [thanks]
John R Pierce
pierce at hogranch.com
Fri Dec 8 20:59:19 UTC 2006
>
> Hardware raid is not necessarily faster than software raid.
hardware raid with battery-backed writeback cache is HUGELY faster at
the very critical synchronous commit (fsync()) operations required by
transactional database servers. so it all depends on what your
application requirements are. if you just care about single threaded
sequential reads, you'll probably do best with software SATA RAID10 on
SATA. if you need fast random access committed writes, then you need a
raid card with cache, and a battery so that you can safely enable
writeback caching in the controller.
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