This section describes what you need to read and what decisions you should make before you enable VMDSS.
Study the DB2 Server for VM Program Directory which contains important service information and special instructions.
Before you enable VMDSS, you should check whether there is any additional Preventive Service Planning (PSP) information that you should know; check with your IBM Support Center or use IBMLINK (ServiceLink).
This program release is maintained through the use of PTF tapes. An updated Version or Release replaces the entire program code; a PTF tape only replaces the changed portion of the program code.
For more information, refer to the DB2 Server for VM Program Directory.
Follow the same corrective service procedures for VMDSS that you follow for DB2 Server for VM. For more information, refer to the DB2 Server for VM Program Directory.
You have several options when you enable VMDSS. Read the following to help you evaluate which one you should use.
If you are using VMDSS on an existing production database, you may want to carefully control which, if any, VMDSS functions you use. While the default settings will turn all the functions on (with the exception of Data Spaces Support for the directory), you can reset your operating parameters to turn everything off before you restart your database.
With all the VMDSS functions off, you can ensure that your production system is working as it was before you installed VMDSS. You can then selectively turn on various components (you may need to stop and restart the database manager) and monitor their effect.
You can move your database manager to an operating system or hardware platform that does not support VMDSS but does support DB2 Server for VM. You may need to do this if you have a backup system that does not meet all of VMDSS's requirements.
Complete the steps listed in Disabling VMDSS; then, move your database manager following your normal procedures.
If you previously stored the DB2 Server for VM DBSS component in a saved segment, you can resave it after you enable VMDSS. Because VMDSS only affects the DBSS component, and does not significantly increase its size (41KB), you can use the default saved segment definition included with the base product. Refer to Step 10: Resave the DBSS Saved Segment for a description of how to use VMSES/E and the ARISAVES EXEC to resave the DBSS component in a saved segment.