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From: djh@osc.edu (David Heisterberg)
Newsgroups: comp.unix.cray
Subject: Re: How to use an SSD?
Message-ID: <582@illini.osc.edu>
Date: 29 May 90 16:49:16 GMT
Article-I.D.: illini.582
References: <1019@orange19.qtp.ufl.edu>
Organization: Ohio Supercomputer Center, Columbus, OH, USA
Lines: 19

In article <1019@orange19.qtp.ufl.edu>, bernhold@qtp.ufl.edu (David E. Bernholdt) writes:
> How are SSDs presently used (under UNICOS)?

Of course, you're probably familiar with how we use ours, Dave.  We have
a 128MW SSD used as cache, and I believe swapping.  There are times that
I'd like to experiment with it - like using it for 2-electron integrals.
But for that case it's not really big enough to be used by more that one
person at a time.

I tend to to think that unless a very similar SSD-like device is available
on a wide variety of machines it is not worth the effort for end users to
put much time in optimizing a program for SSD usage.

Relatedly (and this should probably be a separate thread), I find it
difficult to make good use of asynchronous i/o.
-- 
David J. Heisterberg		djh@osc.edu		And you all know
The Ohio Supercomputer Center	djh@ohstpy.bitnet	security Is mortals'
Columbus, Ohio			ohstpy::djh		chiefest enemy.