Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!hp4nl!svin02!eba!ebh.eb.ele.tue.nl!wjw
From: wjw@ebh.eb.ele.tue.nl (Willem Jan Withagen)
Newsgroups: comp.sys.apollo
Subject: Re:  SR10.3 file system changes ?
Message-ID: <1202@eba.eb.ele.tue.nl>
Date: 6 Jun 91 11:22:01 GMT
References: <9106051345.AA08802@richter.mit.edu>
Sender: news@eb.ele.tue.nl (The News system)
Reply-To: wjw@eb.ele.tue.nl
Organization: Digital Systems, Eindhoven University of Technology, the Netherlands
Lines: 29

In article <9106051345.AA08802@richter.mit.edu>, krowitz@RICHTER.MIT.EDU (David Krowitz) writes:
=> SR10.2 systems allocate disk space in 1Kb blocks for the
=> Motorola 68020/68030 machines. The newer 68040 based
=> HP400 series machines have a slightly different memory
=> management unit that wants to use 4Kb blocks. If you
=> directory has lots of small files in the 1 to 2 Kb range,
=> then the HP400 series machine will wind up allocating
=> a lot more disk space than the DN3xxx/4xxx machines.

Well I'd think a usenet-news system would fall in this category. :{
Haven't checked it, but my guess is that about 90% is less than 1K.
This would shure be a killer on an HP400 (or is it all 10.3)
I just checked: 
	/bin/pagesize on DN4500 gives 1024
	/bin/pagesize on HP400  gives 4096

So I won't get into trouble yet when upgrading my news-gate DN4500 from
10.2 to 10.3.
But when I go and put it on a HP400, can I create a seperate disk-partition
with 1k blocksize just for the news volume??
I know that this should be a trivial question, since it has to be done
on any Unix-box, except of course Apollo's.

Willem Jan
-- 
Eindhoven University of Technology   DomainName:  wjw@eb.ele.tue.nl    
Digital Systems Group, Room EH 10.10 
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