For some reason we forget that IP packet processing on the client and server
take a lot of CPU resources.  Check your CPU utilization on both to see what
is happening.  My experience is a 450mhz x 4 P660 can process maximum of
about 70000 kb/sec.  When we had only one gigabit interface that is what it
ran at and also with 2 gigabit interfaces in total.  In both cases the CPU
goes to 100 percent and no more packets can be processed.

It can also be a client issue if they do not have enough CPU to push the
data to the server.

This is the place LANFREE comes into play.

Paul D. Seay, Jr.
Technical Specialist
Naptheon Inc.
757-688-8180


-----Original Message-----
From: Conko, Steven [mailto:sconko AT ADT DOT COM]
Sent: Tuesday, December 24, 2002 9:44 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Gigabit Ethernet speed


anybody have any tips on what type of "Network transfer rate" we should be
seeing for our backups over gigabit ethernet? the clients backup via copper
Gb ethernet dedicated for backups to a tsm server connected to a 3494 tape
library with 10 3590 tape drives via fibre channel/brocade switch.

there is only one client on one gigabit interface and 3 on another.

any tips for improving network performance?

thanks

Steven A. Conko
Senior Unix Systems Administrator
ADT Security Services, Inc.