Hi John,
Its not the amount of data,  its the number of files.
In other words its the database entries that carry the relatively high cpu
overhead.
But thats pretty well the same with any large DB2 or similar  database
application.
regards





"Doherty, John (ANFIS)" <john.doherty AT ANFIS.CO DOT UK> on 11/13/2001 
02:53:58 PM

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: John Naylor/HAV/SSE)
Subject:  TSM 4.1 & MVS 390 Performance



Hi let me explain my problem and see if any of you mainframe 390 guru's Can
help me.

We are currently running TSM 4.1.2.0 on a 390 mainframe running on a token
ring network
We currently back up on average 230 nodes per night amounting to approx.
+60GB per night.

We have found TSM very CPU intensive in relation to other applications, say
DFDSS moving 2GB or FTP or HSM.  I realise that backing up data comes at a
cost but are any of you experiencing similar
Problems with TSM and OS390 ?

Or is it just that TSM running on a mainframe is notoriously CPU intensive

any replies on performance re 390 and TSM appreciated.


> John Doherty
> Technical Specialist
> Storage Management
> Email: john.doherty AT anfis.co DOT uk
> Tel: +44 (0) 141 275 7793
> Fax: +44 (0) 141 275 9199
>
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