well, i just tried something silly, I did the backup over NFS to the
tape server, which is not really a nice way to do backups.. but the
preformance was great. I got 350k/sec from the O-200 and 195k/sec from
the chalange-S which seems to point to some problem with SGI's and
ftp/amanda. I'm going to call and yell at SGI sometime soon.
Chris Marble wrote:
>
> Ben Kochie wrote:
> >
> > I've been wrestling with some fairly slow backups for a while now. I
> > have amanda 2.4.2 server, running a dual 733 dell rack server, (256mb
> > ram, UW scsi disk) with a 3com 100mb switch stack. the network is far
> > from saturated.
> > the only thing that gets me are the clients.. I have 3 SGI's, a
> > challange-S, an O-200, and an O2. I also have a PII-450 netBSD
> > machine. all run extremely slow.
> > as far as I can tell from my MRTG graphs.. no single backup process will
> > exceed 100KB/sec, most run around 50KB/sec
> >
> > here are some of my config lines...
> >
> > ---- amanda.conf ----
> > inparallel 12
> > maxdumps 5
> > netusage 100 Mbps
> >
> > define dumptype ima-ss-comp-high-tar {
> > high-tar
> > compress server fast
> > exclude list "/usr/local/amanda/etc/amanda/Test/excludes"
> > }
> >
> > define interface eth0 {
> > comment "100 Mbps ethernet"
> > use 100 Mbps
> > }
> >
> > define interface local {
> > comment "a local disk"
> > use 50 mbps
> > }
> >
> > ------ disklist -----------
> > fs0 /home ima-ss-comp-user-tar 1
> > eth0
> > fs0 /varsity ima-ss-comp-user-tar 2
> > eth0
>
> How about trying the backups without specifying the interface
> parameter in the disklist? I never could get that to work the way
> I wanted. I just set dumptypes with different maxdumps numbers for
> different systems. My antique boxes with 10Mb EtherNet use
> maxdumps 1. My fast systems have maxdumps 2.
> Are you doing all the compression on the tape host? That could
> grind things to a halt.
> --
> [EMAIL PROTECTED] - HMC UNIX Systems Manager
> My opinions are my own and probably don't represent anything anyway.
--
Ben Kochie | [EMAIL PROTECTED]
IMA Systems Office | 400 Lind Hall, 207 Church St. SE
http://www.ima.umn.edu | Minneapolis, MN 55455-0463
