> However, I keep getting conflicting advice. My choices are along
> these lines:
> Dual Xeon 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with external RAID via fibre channel (eg, nstor)
An Opteron, properly tuned with PostgreSQL will always beat a Xeon
in terms of raw cpu.
RAID 10 will typically always outperform RAID 5 with the same HD config.
Fibre channel in general will always beat a normal (especially an LSI) raid.
Dell's suck for PostgreSQL.
Joshua D. Drake
> I'm sure any of these will whip the bottom off the Dell 2650, but
> which will be the fastest overall? No way to know without spending
> lots of money to test. :-(
> Dell claims their new 2750 will be faster, but they've lost the battle
> already, and won't commit to any performance numbers. Won't even give
> me a ballpark number.
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