Solaris takes more resources then SunOS. We had to upgrade all our 32 meg
SunOS AFS servers to 64 megs when we moved to Solaris. Actually 48 megs
might work for smaller servers. Otherwise they had a tendency to swap. You
do not want the AFS fileserver to swap.
Randall
On Sat, 24 Jan 1998, Jeffrey Hutzelman wrote:
: >
: > We are thinking about upgrading our AFS server from SunOS 4.1.3_U1 to
: > Solaris 2.5.1 so that we can start using Sparc Ultras as AFS servers.
: > AS part of the process of getting comfortable with a Solaris AFS
: > server I did some minimal load testing in our test cell. The servers
: > in our test cell are Sparc Classics with 32M of RAM and circa 1992 1G
: > disks. I was disturbed to find that in the couple of tests that I did
: > the Solaris machine was 20%-30% slower than the SunOS machine. While
: > the machines in our production cell (SPARC5s, 96M, and 4 or 5 2G
: > disks) are faster, so this slowdown may not be as noticable, and with
: > the additional speed of moving to ultras we'll undoubtedly end up with
: > a net speed increase, I am concerned. I'm also wondering whether we
: > need to rethink our plan of significantly increasing the gigabyte to
: > server ratio when we move to Ultras. Does anyone have any relevant
: > thoughts or experiences?
:
: We've run for quite some time now with 8 disks per server (including
: the system disk) spread across two SCSI busses. When I started here,
: we were using that configuration with 500MB - 2GB disks on DEC 5000
: and Sparc 1-class machines running Mach. Since then, we've eliminated
: all the DEC machines, upgraded all but a handful of the Sun's to
: SunOS 4, and most servers now have one 1GB system disk and seven
: 4GB disks with AFS data.
:
: More recently, we've started running Solaris on some systems,
: primarily to support Sun's fast-wide SCSI / 100Mbps ethernet
: combo card. Most machines with those cards are Sparc 4's and 5's,
: with a couple of 20's thrown in for good measure. We've also
: started deploying 9GB disks, but generally not more than 2 such
: disks per SCSI bus, in order to keep the GB/server ratio from
: getting too absurd.
:
: I can't recall having heard any complaints about the performance
: of any of the servers running on newer hardware, regardless of
: whether they are running SunOS or Solaris. If you like, I can
: try to run some more concrete tests.
:
: -- Jeffrey T. Hutzelman (N3NHS) <[EMAIL PROTECTED]>
: Systems Programmer
: School of Computer Science - Research Computing Facility
: Carnegie Mellon University - Pittsburgh, PA
:
:
