Look at the proceedings at www.share.org from the Nashville Meeting.  A
couple TSM sessions given by Charlie Nichols from the TSM Performance Lab
has everything you need (5722 and 5723).

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


-----Original Message-----
From: Bill Boyer [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 16, 2002 9:34 AM
To: [EMAIL PROTECTED]
Subject: Re: Tuning TSM


Great for AIX, but does anyone have IP tuning parameters for Windows2000?

Bill Boyer
DSS, Inc.

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]]On Behalf Of lt
Sent: Wednesday, May 15, 2002 6:42 PM
To: [EMAIL PROTECTED]
Subject: Re: Tuning TSM


Hi,
 Be sure to set "ALL" parameters for the nic cards correctly to match the
ports on the switches.  Ensure that "ALL" 'no options' are set correctly for
your environment.

Example:
 AIX 433_ML_08:
  100MB ethernet nic cards have the xmit/recieve buffer pools maxed out
  100MB ethernet nic cards have the speed/duplex set to match switch ports
  'no options' are set via an /etc/rc.{filename} & called via /etc/inittab
via:
  rctunenet:2:wait:/etc/rc.tunenet > /dev/console 2>&1 #Tune Network Parms
   example:
    /etc/rc.tunenet
     if [ -f /usr/sbin/no ]
     then
     thewall=$(/usr/sbin/no -o thewall | awk '{ print $3 }')
     if [ $thewall -lt 4096 ]
     then
     /usr/sbin/no -d thewall
     else
     print thewall is set to $thewall - left as is
     fi
     /usr/sbin/no -d thewall
     /usr/sbin/no -d sb_max
     /usr/sbin/no -o tcp_sendspace=$thewall
     /usr/sbin/no -o tcp_recvspace=$thewall
     /usr/sbin/no -o udp_sendspace=64000
     /usr/sbin/no -o udp_recvspace=64000
     /usr/sbin/no -o net_malloc_police=32768
     /usr/sbin/no -o tcp_mssdflt=1452
     /usr/sbin/no -o ipqmaxlen=150
     /usr/sbin/no -o rfc1323=1
     fi
     print "Network parameters tuned..."
 By allowing AIX_ML_08 to "figure out" the best settings for thewall/sb_max,
no -d thewall/sb_max, I do not have to go thru the issue of calculating it
anymore!!!  Having gone thru the above scenario, my 100MB ethernet cloud
performs at, a minimum, 10MB/sec. A lot of the network traffic is logged at:
11MB/sec.  We are now implementing a GIG ethernet network and I am looking
forward to working with it as well.

HTH.


Mr. Lindsey Thomson
BLDG:042/2F-065 IMA: 0422F065
11400 Burnet Rd.,  Austin, TX 78758
off) 512) 823 6522 / (TL) 793 6522

"I never waste memory on things that can easily be stored
 and retrieved from elsewhere."    - Albert Einstein
"Blessed is the nation whose God is the Lord" - Psalm 33:12 "Time is a great
teacher, but unfortunately it kills all
 its pupils"    - Hector Berloiz

On Wed, 15 May 2002, Ignacio Vidal wrote:

> Hi:
> I'm managing a pretty small TSM installation with 4 RS/6K machines (2
> 6M1 and 2 6H1) running AIX 4.3.3 (ML9). TSM software consists of the
> server (running in a 6M1 - 7Gb RAM), and the clients running in the
> same machine and on the others.
>
> I4ve got the following situation:
> - the total of data backed up is about 200Gb's,
> - 4 servers are connected using gigabit ethernet links (and have 6Gb
> RAM and 7Gb RAM each model 6H1 and 6M1 respectively)
> - TSM uses a storage pool of 240Gb on FastT500 disks (those are
> connected by FC channels)
> - TSM uses a 3581 library (LTO) with 1 drive,
>
> The fact is (for the same set of information):
> When I do an archive backup operation with TSM, the time elapsed
> rounds 5 hours (TSM writes "right to" the tape). When I do an
> incremental backup operation, TSM uses about 6:30hs for it (TSM writes
> to storage pool).
>
> I'm looking for a rational approach to solve this "problem": isn't it
> more fast writing to storage pool (disk) that to tape?
>
> Anyone had the same performance problem?
>
> Is it really a performance problem?
>
> I would like some commentaries about this, I can provide some info
> about the configuration of TSM and the AIX servers.
>
> Regards
>
> Ignacio
>

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