Re: 1 TB of memory

From: "Luke Lonergan" <llonergan(at)greenplum(dot)com>
To: "Jim Nasby" <jnasby(at)pervasive(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: 1 TB of memory
Date: 2006-03-17 06:44:25
Message-ID: C03F9AC9.1F5EE%llonergan@greenplum.com
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Jim,

> PostgreSQL tuned to the max and still too slow? Database too big to
> fit into memory? Here's the solution! http://www.superssd.com/
> products/tera-ramsan/

With a single 3 Gbyte/second infiniband connection to the device?

You'd be better off with 4 x $10K servers that do 800MB/s from disk each and
a Bizgres MPP - then you'd do 3.2GB/s (faster than the SSD) at a price 1/10
of the SSD, and you'd have 24TB of RAID5 disk under you.

Plus - need more speed? Add 12 more servers, and you'd run at 12.8GB/s and
have 96TB of disk to work with, and you'd *still* spend less on HW and SW
than the SSD.

- Luke

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