Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!ut-sally!husc6!think!ames!ptsfa!hoptoad!rtech!mark From: mark@rtech.UUCP (Mark Wittenberg) Newsgroups: comp.sys.mac Subject: Re: A/UX filesystem performance Message-ID: <1084@rtech.UUCP> Date: Thu, 23-Jul-87 21:19:28 EDT Article-I.D.: rtech.1084 Posted: Thu Jul 23 21:19:28 1987 Date-Received: Sat, 25-Jul-87 13:54:09 EDT References: <2495@hoptoad.uucp> Organization: Relational Technology Inc. Alameda, CA 94501 Lines: 20 From article <2495@hoptoad.uucp>, by tim@hoptoad.uucp (Tim Maroney): > A/UX runs on top of the Mac OS. If the UNIX file system is not "real UNIX" > but merely a front-end to the Mac HFS software, then the single-threaded > nature of HFS could be expecvted to present extreme performance obstacles, > since only one process's file system request can get serviced at once, and > the rest are sleeping. I don't have an A/UX to play with, but if it runs > Mac disks, then it is almost surely not a real UNIX file system. > -- > Tim Maroney, {ihnp4,sun,well,ptsfa,lll-crg,frog}!hoptoad!tim (uucp) > hoptoad!tim@lll-crg (arpa) A/UX doesn't run on top of the Mac OS, and uses UNIX file systems, not HFS or MFS. There may be utilities to read those disks, but A/UX doesn't recognize them as filesystems. You're right, a single-threaded UNIX filesystem would have disastrously poor performance. -- Mark Wittenberg Relational Technology, Inc. Alameda, CA ihnp4!zehntel!rtech!mark or ucbvax!mtxinu!rtech!mark