Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!seismo!ll-xn!ames!oliveb!amdahl!howard
From: howard@amdahl.amdahl.com (The Toolmaster)
Newsgroups: comp.sys.mac
Subject: Re: A/UX filesystem performance
Message-ID: <10252@amdahl.amdahl.com>
Date: Thu, 16-Jul-87 12:15:37 EDT
Article-I.D.: amdahl.10252
Posted: Thu Jul 16 12:15:37 1987
Date-Received: Sat, 18-Jul-87 08:02:01 EDT
References: <44025@beno.seismo.CSS.GOV>
Reply-To: howard@amdahl.UUCP (The Toolmaster)
Organization: Amdahl Corp, Sunnyvale CA
Lines: 39

In article <44025@beno.seismo.CSS.GOV> mo@seismo.CSS.GOV (Mike O'Dell) writes:
>
>Shucks, folks, I've got a SysV machine with 4 12.5 Megahertz 68000's
>with Eagle disk drives that only gets 50 KBytes/second through
>the filesystem.

Shucks, folks, I wanted to post the transfer rate for my SysV machine but
time just doesn't have the resolution to handle "cat /usr/dict/all >/dev/null"
It just keeps coming back with zero.

>That's only 1/6th the speed I get out of a SUN 3/160 with two
>ST506 drives on an Emulex SCSI controller (measured at 250 to
>300 KBytes per second).

Oh, I should say my machine is an Amdahl 5890 running two
processors, with your standard channel attached 6380E disk drives.

>Anyway, take heart folks - V6 used a 512  byte transfer size and
>could get only about 25 KBytes/second.  System V with its 1 KByte
>transfer size gets 50 K - that's a 100% improvement.

And UTS uses 4K blocks, for an infinite improvement :-)

>	Yours for more amazing technology,
>	-Mike O'Dell

But I still prefer the amazing technology on my desk, a MacSE.  UTS makes
a great backend though.

>PS - "System V - Consider It Standard."

PS - BSD4.x - Consider it Adhoc.

-- 
"Plan for the future because that's where you                Howard C. Simonson
    are going to spend the rest of your life." {hplabs,ihnp4,nsc}!amdahl!howard
         - Mark Twain -

[ The disclaimer for this message may be found in my next article ]