My point here was yes, if you have the CPU on the machines to do it.  If you
are talking about between a single client and TSM Server, this really only
applies to TDP backups that allow multiple node definitions for the threads.
This is a long complex discussion.

The more common usage is to have multiple gigabit cards in the TSM server
and split the clients among the TSM server IP addresses for the gigabit
cards.

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


-----Original Message-----
From: Antonio J Pires [mailto:antoniopires AT PT.IBM DOT COM] 
Sent: Monday, December 30, 2002 6:43 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Gigabit Ethernet speed


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:
ADSM-L AT VM.MARIST DOT EDU

                      .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:TRushfor AT CITY.WINNIPEG.MB DOT CA]
Sent: Friday, December 27, 2002 8:27 PM
To: ADSM-L AT VM.MARIST DOT EDU
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:seay_pd AT NAPTHEON DOT COM]
Sent: December 27, 2002 2:53 PM
To: ADSM-L AT VM.MARIST DOT EDU
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: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.