The client can indeed consume a large amount of memory during the backup,
as it requests backup information from the server for all active backup
versions. Given your large file system, several hundred MB of memory
doesn't surprise me.

Try the 4.2.1.26 patch level, which includes a fix for IC32797 that may
address at least part of your problem. While the client may still require
large amounts of memory (I don't think it will need anywhere near 4 GB!,
though), this fix should improve the efficiency of TSM's memory allocation
routines, and help mitigate the problem.

You can find the patch at:

ftp://ftp.software.ibm.com/storage/tivoli-storage-management/patches/client/v4r2/Windows/WinNT/v421

The file names you need all begin with IP22373_26. Please review the
IP22373_26.README.FTP file for download and install instructions.

While I can not give you an exact number as to how much memory you need,
you may be a bit underpowered at 512 MB of RAM. But try the patch, and see
if it helps.

Regards,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Development
Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com

The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.




Sascha Askani <se7en_t_2 AT GMX DOT NET>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
03/06/2002 03:42
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        Client Memory usage on NT CLIENT



Hi,

we are using a 4.2.1 Client on a Machine running WinNT4 SP6a. The Client
is
connected to an FC-Array containing approx. 1'000'000 files and 1'800'000
directories (growing). Since the TSM hangs the whole system when trying to
backup these files, I took a look on the memoy usage: the software uses
360
MB of RAM after running for 2m30sec and still shows zero inspected
objects.
Do you have a clue how much RAM I need to successfully backup these files
and what values are there to tune the performance ?

I used the "memory efficient backup" switch, that changed nothing.
The machine is a P3-866, 512MB RAM.

According to IBM I need approx. 4GB of RAM to do this Backup ?!

Greetings and TIA

Sascha