we're running aix 4.3.3 ML 10, so we have to have our gig e network cards
set to auto_negotiate as they do not have a setting for 1000. a check of the
device reports it IS running at 1000 MB full duplex.
for our primary backups (i.e. database/large file) we are typically seeing
between 8K - 15K. for system level backups (smaller files* we have seen up
to 20K.
we do not have jumbo frames enabled, but i think we could do so because the
gigabit backbone is dedicated to backups. if we enable jumbo frames, what
should we set the mtu size to?
-----Original Message-----
From: Kelly J. Lipp [mailto:lipp AT STORSOL DOT COM]
Sent: Tuesday, December 24, 2002 5:36 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Gigabit Ethernet speed
What kind of performance are you seeing?
I would expect a number greater than 20,000 KB/sec as reported by a client
summary.
I also would expect it to be highly variable and dependent on client speed.
I believe that Gig E is going to be faster than just about anything else in
all but the highest end systems so suspect a bottleneck elsewhere.
As with 100 Mbit networks, duplex and link speed incompatibilities are
killers. 100/1000 full is the way to go. Stay away from Auto unless you
have un-managed network switches.
Thanks,
Kelly
Kelly J. Lipp
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
lipp AT storsol DOT com or kelly.lipp AT storserver DOT com
www.storsol.com or www.storserver.com
(719)531-5926
Fax: (240)539-7175
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Conko, Steven
Sent: Tuesday, December 24, 2002 7:44 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.
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