Xref: utzoo news.sysadmin:3690 news.software.b:7676 comp.unix.aix:4927
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!decwrl!sgi!shinobu!odin!soul!jeffs
From: jeffs@soul.esd.sgi.com (Jeff Smith)
Newsgroups: news.sysadmin,news.software.b,comp.unix.aix
Subject: Re: IBM RS/6000 unsuitable for news
Message-ID: <1991May7.011746.3754@odin.corp.sgi.com>
Date: 7 May 91 01:17:46 GMT
References: <BGLENDEN.91May6130729@colobus.cv.nrao.edu> <1991May6.181144.23900@zoo.toronto.edu>
Sender: news@odin.corp.sgi.com (Net News)
Organization: Silicon Graphics, Inc.  Mountain View, CA
Lines: 21

In <1991May6.181144.23900@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:

>In article <BGLENDEN.91May6130729@colobus.cv.nrao.edu> bglenden@colobus.cv.nrao.edu (Brian Glendenning) writes:
>>A quickie shell script tells me that:
>>(total size in 4k blocks)/(total # of bytes in files) = 2.0
>>On a Sun with 1k blocks the number is 1.2.
>>This ignores the role of fragments, which I would have thought would
>>go a long way to saving the day for AIX...

>Do remember that the Sun is quoting space used in KB.  If AIX is being asked
>to quote space usage in 4K blocks, quite plausibly it is rounding file sizes
>up to multiples of 4K.  Make sure this is really a space-consumption problem
>rather than just a reporting problem.

Well I'm not sure if bglenden's numbers are correct, but his conclusions are
correct--the JFS (AIX filesystem) uses a 4KB blocksize, and does not do
fragmentation (ala BSD FFS).  This makes undesirable for a netnews server.


jeffs@sgi.com						(former RS/6000 user.)
"Let's get SWIZin!"