Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!wuarchive!emory!jdyx!shawn
From: shawn@jdyx.UUCP (Shawn Hayes)
Newsgroups: comp.unix.sysv386
Subject: Re: Disk benchmark (long)
Message-ID: <1990Oct13.032355.3176@jdyx.UUCP>
Date: 13 Oct 90 03:23:55 GMT
References: <1990Oct9.015948.551@jdyx.UUCP> <1990Oct12.231159.23105@ico.isc.com>
Distribution: usa
Organization: JDyx Enterprises (Atlanta GA)
Lines: 17


   Dick Dunn was entirely correct in his posting.  I am looking to test both
the SYNC and NOSYNC modes.  The NOSYNC times could also be affected by buffer
size if the buffer is under 2 megabytes.  What I would like to find is either
a version of UNIX that has better disk performance capabilities( perhaps by
putting the inode and the file data at the same point on the disk) or another
way of accessing/updating the data that avoids the inode update penalty. 

   I suspect that the two updates required in Unix explain why OS/2 can
give a performance of up 3 times what AIX 1.2 shows.  If anyone knows of a
method of improving file performance or of a Unix that gives increased file
performance over AIX please speak up.  I'd really rather work on a Unix 
system than OS/2 but disk performance is critical for our application.

Thanks.

Shawn