All Control-D features (for example, online viewing, printing, archiving) are available using either of the two CDAM creation methods. The benefits of writing directly to CDAM datasets rather than to the spool, are summarized below:
Redundant read and/or write operations are eliminated (that is, using the Post Spool method, output is written to the spool, then written to a CDAM dataset). This duplication is eliminated using the Pre-Spool method.
The elapse time of jobs creating large report outputs is reduced by 10% or more. This benefit is achieved because of an increase in performance when writing to CDAM datasets rather than to the system spool.
The reports are written in compressed format, saving between 30% to 70% of required space.
CDAM datasets are protected using the installation security package, avoiding potential security infringements that can occur on the spool.
The spool is no longer used as a report repository and can be reduced in size, releasing valuable disk space.
The danger of the spool reaching 100% utilization is greatly reduced.
