Re: Open letter to Dave Olson, SGI [was SCSI vs. IPI]

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Article #17

#17

From: Adams
Date: Wed, 05 Aug 1992 01:11

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In article <1992Jul29.221440.1166@ukw.uucp> lupe@ukw.uucp (Lupe Christoph) writes:

>   >The application does nothing else than to read in frames, one about
>   >50 kBytes, unbuffered (simple read()). One hint:  ...  more than
>   >90% idle, though single user mode!, and drive is kept selected.

>   In this thread, nobody has asked or volunteered if this app is using
>   the filesystem or reading from a raw disk. The performance sounds
>   like the latter, loosing revs all the time. This would also explain
>   the high idle time percentage.

You are right, the application stores data in files. It does not read from
raw disk.

Thanks, adams

Technical Details

Message-ID: <ADAMS.92Aug5011147@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de>

Path: arc1-ca.pugleaf.net!sparky!uunet!math.fu-berlin.de!news.th-darmstadt.de!adams

References:

<BrCG6x.Jpp@acsu.buffalo.edu> <ADAMS.92Jul16014945@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de> <BrH2sz.5qM@csn.org> <ADAMS.92Jul16125743@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de> <nch5oa8@zuni.esd.sgi.com> <ADAMS.92Jul17162917@PDV2.pdv2.fmr.maschine <1992Jul29.221440.1166@ukw.uucp>

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Newsgroups: comp.arch.storage
Path: arc1-ca.pugleaf.net!sparky!uunet!math.fu-berlin.de!news.th-darmstadt.de!adams
From: adams@pdv2.fmr.maschinenbau.th-darmstadt.de (Adams)
Subject: Re: Open letter to Dave Olson, SGI [was SCSI vs. IPI]
Sender: news@infoserver.th-darmstadt.de (The Usenet-News System)
Message-ID: <ADAMS.92Aug5011147@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de>
In-Reply-To: lupe@ukw.uucp's message of 29 Jul 92 22: 14:40 GMT
Date: Wed, 5 Aug 1992 01:11:47 GMT
References: <BrCG6x.Jpp@acsu.buffalo.edu>
 <ADAMS.92Jul16014945@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de>
 <BrH2sz.5qM@csn.org>
 <ADAMS.92Jul16125743@PDV2.pdv2.fmr.maschinenbau.th-darmstadt.de>
 <nch5oa8@zuni.esd.sgi.com> <ADAMS.92Jul17162917@PDV2.pdv2.fmr.maschine
 <1992Jul29.221440.1166@ukw.uucp>
Nntp-Posting-Host: pdv2.fmr.maschinenbau.th-darmstadt.de
Organization: TH-Darmstadt
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