Iperf between Linux systems with gigabit consistantly reports
around 760 mbits/sec (95 MB/s.)  [1]

I don't have a Sun with gigabit right now, but it'd probably be
easy for you to try iperf.  I'd be curious to know what you get.
(I sure hope it's more than 40 MB/s!)

steve
- - -
systems & network guy
high energy physics
university of wisconsin

 [1] http://dast.nlanr.net/Projects/Iperf/

 > ---- Original Message ----
 > From: Michael Hurst
 > Hi All,
 >
 > We recently setup a Gb network between 4 Linux 6.1.3 clients and our Solar
 > is 6.1.3 NetWorker Server.
 > When we backup the clients to 3 LTO-1 drives we get a rate of 14MB/s on ea
 > ch drive.
 > When we add a fourth drive to the backups, the rate drops to 10MB/sec on e
 > ach drive.
 >
 > We then put a port monitor on the connection to the NetWorker Server.
 > No matter how I change the number of clients, target sessions or paralleli
 > sm we top out the connection at just over 40MB/sec.
 >
 > We were wondering if this is the maximum transfer rate we will see on the
 > Gb interface or if we need to tune tcpip.
 > Is anyone seeing better speeds on the Gb NIC to their NetWorker Servers?
 >
 > Note: NetWorker Server is a Sun Fire 280-R with dual 700Mhz CPUs and 1.5GB
 >  of RAM.
 > Still shows lots of CPU and memory available during the backups.
 >
 > TIA,
 > Michael Hurst
 > University of Toronto
 > Email: michael.hurst AT utoronto DOT ca
 >
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