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From: frank@croton.enet.dec.com (Frank Wortner)
Newsgroups: comp.unix.ultrix
Subject: Re: presto
Message-ID: <1895@riscy.enet.dec.com>
Date: 6 Feb 91 15:53:12 GMT
References: <AJT.91Feb6151243@bilbo.bhpmrl.oz.au>
Sender: newsdaemon@riscy.enet.dec.com
Reply-To: frank@croton.enet.dec.com (Frank Wortner)
Distribution: comp
Organization: Digital Equipment Corporation
Lines: 43

In article <AJT.91Feb6151243@bilbo.bhpmrl.oz.au>, ajt@bilbo.bhpmrl.oz.au
(Andrew Telford) writes:

> Does anyone have any ideas on how to set up Prestoserve?
> 
> There was no information sent in my Ultrix 4.1 upgrade, and
> the man pages for 'presto' refer to a document %%DNPresto%% which is
> presumably not yet released.

I'm assuming that you have the appropriate hardware:  a DECsystem 5500
or the 5100 and its optional PrestoServe board.  If you don't have either
of these systems, then you can't use PrestoServe, since it consists of
*both* software and non-volatile memory hardware.

First create the device special file, if it does not already exist:

	cd /dev
	MAKEDEV pr0

Second, enable PrestoServe on the filesystems you wish to accellerate:

	/usr/etc/presto -u /dev/ra1c

Or just type plain old

	/usr/etc/presto -u

if you want everything served.

All the information you need is in the manual pages.  Just read
presto(8), dxpresto(8), presto(4), and prestoctl_svc(8).  I had
no documentation when I first saw a prototype 5500, and I managed
to turn on this subsystem for a benchmark.  (It made a pronounced
difference, BTW ;-)  If *I* can figure it out, then ... :-)

The only decisions you might want to make are basically whether
or not you are getting full benefit of the capabilities of this system.
You can use presto or dxpresto to view statistics which can give
you a handle on this.

Hope this helps,

				Frank