Cache Management › Dynamic Cache Management › Dynamic Cache Virtual Volume Size

Dynamic Cache Virtual Volume Size

For Dynamic Cache Management the Virtual Volume Size chosen determines the point at which CA Vtape will force the tape allocation to another Virtual Volume creating a multiple volume tape data set. This is accomplished by presenting an End-Of-Volume condition.

We recommend you use 2000 MB Virtual Volumes. This allows the cache LDSs to vary in size as needed from a minimum of 12 MBs for very small data sets to as large as 2000 MBs for large data sets. This is the most efficient way to use space in the storage group and minimizes the number of multivolume virtual tape data sets created.

Virtual Volume Sizes of 4000, 8000, and 16000 MBs can be coded with the VolumeSize attribrute in the Volume Pool Definitions Section of the CA Vtape parmlib.