Conversion Procedures › Migrating to Dynamic Cache Management

Migrating to Dynamic Cache Management

CA Vtape provides several tools to convert from Static Cache Management to Dynamic. More than one conversion method is supported because no one strategy is right or wrong for all shops. There are several factors to consider when converting, as in the following examples:

• How much additional DASD space is available? If sufficient DASD space is available, you may consider converting all of the Virtual Volumes in one step. If there is little or no additional DASD space you may need to convert your existing cache volumes in phases.
• How many subsystems are you converting? If there are only a couple of subsystems and a small amount of down time is acceptable, the conversion may be easier to do all at once. Conversely, if there are many subsystems, it may make more sense to slowly roll out the conversion to each subsystem separately.

While these are not the only possible methods, the two basic strategies described for converting are:

• Quick Migration
• Phased Migration