ADSM-L

Re: [ADSM-L] Tsm server possibly limiting backup performance

2011-05-27 11:20:25
Subject: Re: [ADSM-L] Tsm server possibly limiting backup performance
From: "Lee, Gary D." <GLEE AT BSU DOT EDU>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 27 May 2011 10:41:32 -0400
Sorry, thought I had my cases correct.

1 gb (gigabit) ethernet ocnnection.
Ftp and other tests yielded 800 megabit performance,
Tsm sessions average 200 to 250 megabit.
 


Gary Lee
Senior System Programmer
Ball State University
phone: 765-285-1310

 
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Paul Fielding
Sent: Friday, May 27, 2011 10:30 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Tsm server possibly limiting backup performance

I think clarification is needed on mb/s vs. MB/s.

a 1gb (gigabit) (note lowercase) connection will certainly do 800 mb/s
(megabit/s).  it won't, however, do 800 MB/s (megabyte/s)....

Paul


On Fri, May 27, 2011 at 8:09 AM, Richard Rhodes <rrhodes AT firstenergycorp DOT 
com
> wrote:

> A little more explanation is going to be needed.  A 1GB ethernet is not
> going to give 800mb/s, let alone 200mb/s.  1GB ethernet is only going to
> provide one direction throughput of 110mb/s.  Do you mean a 10gb ethernet
> connection?
>
>
>
>
>
> From:   "Lee, Gary D." <GLEE AT BSU DOT EDU>
> To:     ADSM-L AT VM.MARIST DOT EDU
> Date:   05/27/2011 09:35 AM
> Subject:        Tsm server possibly limiting backup performance
> Sent by:        "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
>
>
> Tsm server 6.2.2
> OS redhat enterprise linux 6.0
> Client tdp for exchange, sqlserver, and backup archive client
>
> Client connected via 1 gb ethernet connection.
>
> In my experience, I yhave never been able to se throughput of much more
> than 200 mb/s during a tsm backup, whether tdp or regular client.
> I wonder, is TSM limiting a single session's bandwidth so as to insure
> availability for other client sessions which might begin; i.e. prevent one
> backup stream from monopolizing the server's network connection?
>
> I have run ftp  and other tests to the server, and achieved throughput of
> around 800 mb/s over the same connection.
>
>
>
> Gary Lee
> Senior System Programmer
> Ball State University
> phone: 765-285-1310
>
>
>
>
>
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