CPU, Main Memory, Disk, and Swap Space

In general, the hardware requirements are the same as for the near-Zero Downtime Maintenance approach. Make sure that there is enough temporary disk space available in the file system for the ZDO update because large files are written temporarily to disk during some phases.

See also in the SUM Guide the chapter Preparation    Checking the Hardware Requirements.

Space Requirements in the Database

Make sure that enough temporary and permanent free space is available in your database. In addition to the requirements from the standard update, ZDO requires free database space for the clone tables. The additional free space cannot be quantified beforehand because it depends on the scope of maintenance and on the size of the system.

However, if you already run the impact analysis in the first test cycle in the sandbox system, a projection is done by cumulating the sizes of the clone tables. This calculation is based on the provided statistics file ZDIMPANA.ZIP.

For more information, see Impact Analysis at a Glance.