The size of the QUSRBRM file can affect upgrade installation times
If the size of the QUSRBRM library on your server is large, you could experience long installation times when upgrading BRMS to a newer release. This is due to the conversion of the physical files in the QUSRBRM library to a new file format. The benefits of this conversion are:
More storage available on your system
Shorter save times when saving the user libraries on your system
Less time to save the BRMS media information after each backup.
The physical file conversion occurs during the post processing phase of the primary language install. In V5R3 and above, the impact of this conversion is alleviated somewhat by processing it in a separate batch job, allowing the rest of the system install to continue processing at the same time.
The time required to convert the files in library QUSRBRM will vary depending on the system model, storage configuration and number of records in the physical file in the QUSRBRM library.
NOTE: When you perform the estimation process below, be sure to emulate the system environment which you plan to use when installing BRMS. The conversion performs best when system activity is minimized.
To estimate the conversion time do the following:
If you are upgrading from V5R3, run the following command to determine the estimated conversion time.
INZBRM OPTION(*ESTPRDINZ)Review the job log or the BRMS log for the following message:
BRM402B: ESTIMATED CONVERSION TIME IS nn HOURS AND nn MINUTES.