Hello, Becky
1)-Production's SAP database is about 1.700 GB. 
2)-The tsm server is on the other server separate from SAP database. The TSM 
server is on 7026-B80 IBM server (3x375 Mhz) and the SAP database is on 6M1 IBM 
Server (8x750 Mhz) 
3)-I am using SAN network with switch Mc Data (ED5000 Fiber Channel Director 
2032-001)
4)- Yes, we have a multiplexing of 4. 
5)- We have 8 processor CPU on the SAP database server. 
6)- We are using disks SHARK IBM (3.2 TB). 

I have the following questions: 
1)- Which is the average transmission rate when you are backing up a 2 TB Sap 
database on 10 drives? 
2)- Which kind of drive are you using, LTO Ultrium I (First Generation) or LTO 
Ultrium II (Second Generation)? 

Regards.  
Juan R.  
 

-----Mensaje original-----
De: Davidson, Becky [mailto:Becky.Davidson AT SLBG DOT COM]
Enviado el: Martes, 12 de Agosto de 2003 02:00 p.m.
Para: ADSM-L AT VM.MARIST DOT EDU
Asunto: Re: Extras drives Ultrium LTO to reduce backup SAP's time ?


How large is your SAP database?
Is the tsm server on the same physical server as the SAP database?
If not what kind of network do you have between the two?
Are you using multiplexing in TDP for R/3?
Is your CPU maxed on the SAP database server during the backups?
What kind of disk is your SAP database using?

I am backing up a 2+TB SAP database on 10 drives in under 6 hours.  We have
a multiplexing of 6.

Becky

-----Original Message-----
From: Juan Jose Reale [mailto:juan.reale AT AES DOT COM]
Sent: Tuesday, August 12, 2003 7:21 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Extras drives Ultrium LTO to reduce backup SAP's time ?
Importance: High


 Hello.
I have a LTO Ultrium Ultrascalable Tape Library 3584 L32 and this library
has three (3) drives LTO Ultrium I (First Generation). Every day the TDP for
R/3 (version 3.2.0.8) takes backups online of database's SAP (Oracle)
through TSM Server 4.2. This TSM Server is running on an RS/600 with AIX
4.3.3.  With these tree drives LTO, the backup lasts between 7 and 8 hours
and the average transmission rate was about between 200 GB/h (62 MB/sec) and
260 GB/h (74 MB/sec). This database's size is 1.660 GB.
Well, As I need to reduce the backup's time till 4 hours or down, how can I
find out this solution? Must I allocate others extra drives in order to
reduce the backup's time? I am not sure if it will be reduce the backup's
time with the others drives Ultrium because I have proved the backup with
four drives and his time was not reduced and his result was the same 260
GB/h (74 MB/sec).
I need your comments and I very much look forward to hearning you.
Thank you very much.


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