Re: ASM vs Hardware RAID vs ASM + Hardware RAID
- From: Greg Rahn <greg@xxxxxxxxxxxxxxxxxx>
- To: rjfeighery@xxxxxxxxx
- Date: Mon, 7 Dec 2009 16:45:54 -0800
Currently the Intel Nehalem is only available in "EP" format - the 2
socket version. The "EX" version that supports 4+ sockets will be
coming out early next year. I'd guess after Nehalem-EX is out the
DL5x0 lineup will have that processor.
I'd guess a 2 socket Intel Nehalem-EP 5500 would easily satisfy your
performance requirements. If you are an HP shop then I'd recommend
looking at HP ProLiant DL180 G6. It comes in both a 12LFF or 25SFF
drive (large/small form factor) chassis. There is also the DL370 G6
(but thats 4U, not 2U).
Couple differences between the AMD Istanbul 6-core and the Intel
Nehalem-EP is that AMD only takes DDR2 memory while Intel takes DDR3
which is faster, but the Istanbul has larger L1/L2/L3 caches. The
DDR3 and QPI on the Nehalem are quite fast. I havent done any Oracle
benchmarks to compare them but the Nehelam-EP stuff is very fast.
On Mon, Dec 7, 2009 at 2:27 PM, Ray Feighery <rjfeighery@xxxxxxxxx> wrote:
> On upgrading the server: There does not seem to be a HP DL 580 G6
> model available, or any 4-socket box from HP that has the 5500
> (Nehalem), although there is a 585 G6 with the AMD Opteron™ 8400
> Series processors. Not sure how they measure up. From a pure compute
> point of view, a 2-socket box with quad-core 5500 would still give a
> 2x improvement.
> I hear what you are saying about Sun; we were a Solaris/Sun-only
> company for years, but changed to Linux/HP and never regretted it.
> Maybe it is time to reassess, but I like having only a few vendor
> relationships to manage.
> It's certainly something I will cost.
>
> ASM seems to be generally thought of as a Good Thing. I like the idea
> behind hardware mirroring and ASM striping. Basically, I will need to
> decide on some hardware and then test a few different configurations.
--
Regards,
Greg Rahn
http://structureddata.org
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