Description

The IXLCSP service assists in coupling facility capacity planning and exploitation by providing a means to evaluate the following coupling facility structure values:

Required structure size, given structure attributes and object counts
Resulting structure object counts, given structure attributes and size.
Required storage-class memory (SCM) size, given structure attributes and object counts in SCM.

Calculations do not result in the actual allocation of stuctures, nor do they affect the current contents of the target coupling facility.

Calculations are appropriate to the CFLEVEL of the target coupling facility, but do not take into account current coupling facility conditions such as storage constraints. These conditions might prevent the actual allocation of a structure in the target coupling facility, or might cause the structure to be allocated with significantly different counts than returned by IXLCSP.

You can use the IXLMG service to obtain additional information about the target coupling facility, such as CFLEVEL, model-dependent limits, and storage.