From: Matthew Hannigan (mlh@zip.com.au)
Date: Tue Sep 10 2002 - 19:53:11 EDT
Hi all,
We're about to buy either a a1000 or d1000,
fully populated with 12 * 36Gb disks, i.e.
around 430+Gb.
We are NOT going to use any raiding as we
want to maximise our storage/dollar, and this
is a pilot project where uptime is far from
critical. The system is to be used for data
mining and about half the data will be in an
Oracle database. The ratio of reads vs writes
is unknown but I'm guessing that data mining
involves a LOT of reads compared to writes.
Given the above, the ONLY advantage that the
a1000 mighthave over the d1000 is the presence
of memory cache.
Questions:
1. Will the memory cache make the performance
much better? Considering that there is a maximum
of 40Mb to cache 430+ GB!
2. Can you even use the memory cache on the a1000
if you're not using the RAID features?
I know q2 is better asked of Sun, but I thought
I may as well throw it in since I'm asking q1.
Regards,
Matt
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