Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!husc6!hscfvax!pavlov
From: pavlov@hscfvax.harvard.edu (G.Pavlov)
Newsgroups: comp.unix.wizards
Subject: BSD File Systems and MSCP
Message-ID: <652@hscfvax.harvard.edu>
Date: 30 Oct 88 15:43:19 GMT
References: <6413@daver.UUCP> <8332@alice.UUCP> <1988Oct27.173247.2789@utzoo.uucp> <14235@mimsy.UUCP>
Organization: Health Sciences Computing Facility, Harvard University
Lines: 16


 The several discussions about the BSD file system and one reference to MSCP
 brings up somethingthat we have played with but don't really understand: the
 interaction between tunefs and DEC's MSCP.  A recent message from Chris Torek
 implied that manipulating tunefs parameters may impact performance in the DEC
 Ultrix environment.  We found this to be true up to Ultrix 1.2.  Since then
 (using both Emulex and Dilog controllers), we haven't seen any real difference
 at all (<5% variation in throughput).

 Should this really be the case (e.g., have we screwed up something) ?  Actual-
 ly, I always wondered what really happens "between" tunefs and MSCP.  To me,
 on paper, they seem to be in direct conflict with each other, purpose-wise.
 Anyone know ?


  thanks, greg pavlov, fstrf, amherst, ny