From: Nathan Ollerenshaw (nathan@valuecommerce.co.jp)
Date: Tue Aug 02 2005 - 02:42:52 EDT
Hey guys,
I was wondering if any of you had experience with the E4900 machines,
and what you thought of them.
I'm currently getting pricing on a Oracle DB cluster based on these
with EMC back-end disk.
One vendor is pricing a Sunfire rack with it. Is this rack necessary?
Any ideas if it can go in a standard rack?
Other question I had was that we're planning on having 4 x dual port
2GBit FC HBAs in each machine. Each HBA needs 4Gbit of bandwidth, and
checking the specifications, there should be enough slots of 66Mhz
64bit PCI which have a maximum bandwidth of 4Gbit. Should I split
this out to 8 cards of one channel each? Or is the PCI bandwidth per
slot enough?
If I, for instance, have 4Gbit to each EMC array controller and I am
using software 4-way mirroring over the four controllers, is it
realistic to expect 16Gbit of read performance using EMC's Powerpath
to spread the load over two FC ports per SP?
I've dealt with reasonably large machines before this but never
actually built one from scratch, so I'm not sure what is realistic
and what isn't in terms of what we can do with the E4900s.
We originally were looking at E2900s and found that they don't have
enough of the 64bit 66Mhz PCI slots, so we couldn't have enough FC
bandwidth into the things.
Regards,
Nathan.
-- Nathan Ollerenshaw / Systems Engineer Systems Engineering ValueCommerce Co., Ltd. Tokyo Bldg 4F 3-32-7 Hongo Bunkyo-ku Tokyo 113-0033 Japan Tel. +81.3.3817.8995 Fax. +81.3.3812.4051 mailto:nathan@valuecommerce.co.jp "The man who carries a cat by the tail learns something that can be learned in no other way." - Mark Twain _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers
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