Hi,
Can we use 2 or more gigabit interfaces to increase backup bandwidth?
Any experience on this approach?
Thanks in advance,
António Pires
"Seay, Paul"
<seay_pd@NAPTHEON To: [EMAIL PROTECTED]
.COM> cc:
Sent by: "ADSM: Subject: Re: Gigabit Ethernet speed
Dist Stor
Manager"
<[EMAIL PROTECTED]
.EDU>
28-12-2002 08:36
Please respond to
"ADSM: Dist Stor
Manager"
I agree. However, to my knowledge that is either the default for the P660
offering or there is no way to set it. We use hardware on our Windows
machines. Even then, you have to process the packet queues and when moving
70MB/sec of 1500 byte packets, it takes some resources.
Paul D. Seay, Jr.
Technical Specialist
Naptheon Inc.
757-688-8180
-----Original Message-----
From: Rushforth, Tim [mailto:[EMAIL PROTECTED]]
Sent: Friday, December 27, 2002 8:27 PM
To: [EMAIL PROTECTED]
Subject: Re: Gigabit Ethernet speed
Consider using NIC's with TCP Offload Engines (TOE'S)- this should help
with
CPU utilization.
-----Original Message-----
From: Seay, Paul [mailto:[EMAIL PROTECTED]]
Sent: December 27, 2002 2:53 PM
To: [EMAIL PROTECTED]
Subject: Re: Gigabit Ethernet speed
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:[EMAIL PROTECTED]]
Sent: Tuesday, December 24, 2002 9:44 AM
To: [EMAIL PROTECTED]
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.
