configure tsm server to backup to /dev/null for performance testing

[digidoc]

Hello all.

How do i configure tsm to backup to /dev/null?

I want to test the maximum achievable throughput taking into account all components except for the final storage devices.

If I do a dd test on the client I can read at around 150MBytes/sec from an iscsi lun.
I want to see what remains of this speed going through client, network and server components.

Any help appreciated,
Regards,
Hoyte Swager



server:
Linux vbup1 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:53:09 EST 2011 i686 athlon i386 GNU/Linux
CentOS release 5.5 (Final)
Storage Management Server for Linux/i386 - Version 5, Release 5, Level 5.0

client:
Linux vbup0 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:53:09 EST 2011 i686 athlon i386 GNU/Linux
CentOS release 5.5 (Final)
Command Line Backup/Archive Client Interface Client Version 5, Release 5, Level 3.0

 

[Harry_Redl]

Hi,

as far as I know this is not possible - TSM has to format every volume it uses or write a label on it (which is being checked when volume is mounted) - this is not possible with /dev/null redirection

Harry

 

[digidoc]

Hello Harry.

Thank you for the quick response.
I am sorry to hear this is not possible but I understand your explanation about the writing of labels.
I will leave the thread open for now to see if someone else might have a suggestion.

Regards,
Hoyte Swager

 

[digidoc]

no new info