Example 5: Sizing page data sets when using storage-class memory (SCM)

You can replace some of your DASD paging space with SCM. VIO paging, however, must still be paged to DASD so adequate DASD storage is required to avoid local storage overruns.

For example, if your VIO local page data sets require a given amount of storage, but you have only one local storage DASD allocated for VIO, local storage could become critical. In this case, allocating three times the amount of VIO space required across several DASDs can provide capacity for local storage overruns and also for disk failover.

When migrating to SCM, be aware of the following recommendations:

Maintain your original paging data set configuration while you integrate SCM into your system configuration.
Once SCM has become fully integrated into your system configuration, you can choose to reduce the number of local paging data sets.
Maintain sufficient local paging data space to accommodate VIO pages, because VIO pages are not written to SCM.