How Big is the Spool and How is it Used?

The spool was intended to be a transient area for report printing and this is exactly how Control-D uses it. Implementing the CDAM Direct Write feature (described in Phase 6) will mean that you no longer overload the spool at peak periods. Typically, you will be able to reduce the size of the spool to about one third of its original size, giving you back some valuable DASD space. Another hidden benefit of the CDAM Direct Write feature is that you will see a decrease of about ten percent in the execution time of batch jobs creating large report outputs.