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Checklist of points to improve backup &restore performance on SAP on DB2


Here is a list of points you can check to improve backup performance:

1.) DB2 backup command performance options

There are four options on the DB2 backup command that can improve backup performance. We will give some suggestions for the values to use for these parameters, but review of DB2 documentation is recommended.

OPEN n SESSIONS

This parameter is only valid if the use tsm option is used at the DB2 backup. If specified the backup process will open n I/O sessions to the Tivoli Storage Manager server to send the data to. The number of sessions is limited by the Tivoli Storage Manager node parameter MAXNUMMP which should not be greater than the maximum number of drives at the Tivoli Storage Manager server. If the backup goes directly to a tape storage pool and there are not enough tape drives available at the Tivoli Storage Manager server at the time of backup, some of the sessions have to wait until there are free tape mounts available again. In some cases, the backup may fail if there are not enough mount points available within a defined amount of time (IDLETIMOUT parameter at Tivoli Storage Manager server).
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Start dsmc schedule from command line


To run the schedule command in the background and to keep the client scheduler running, even if you log off your system, enter the following:

nohup dsmc schedule 2> /dev/null &
If a Tivoli Storage Manager password is required for your workstation and you want to run the schedule command in the background, enter the password with the command.

Root User: To start the client scheduler automatically, ensure that the passwordaccess option is set to generate in dsm.sys, then follow the procedure below for your operating system:

For non-z/OS UNIX, add the following entry to the /etc/inittab file:
itsm::once:/usr/bin/dsmc sched > /dev/null 2 >&1 # TSM scheduler

Preparing Wings Server Migration : Day 1


Persiapan untuk pemindahan server SAP ke server baru sudah mulai berjalan. Hari ini orang NPP akan konfigurasi Tivoli Storage Manager. TSM versi 5.5 sudah dicoba diinstall di AIX 5.3 TL 9 yang sekarang ada di server. Namun sepertinya masih ada problem untuk koneksi LAN-Free sehingga backup masih lewat network, tidak lewat kabel FC yang ada.

Hari ini fokus vendor NPP adalah instalasi agent TSM ke server-server baru dan memastikan bahwa semua berjalan baik. Selain itu akan ada pekerjaan untuk membuat schedule backup dan tape management.

Kerjaan gue saat ini adalah fokus mbenahin parameter dan profile SAP. Masih berkutat pada work process yang masih ngadat alias nggak mau up.