Physical Sequential Transparency › Implementation Considerations › Deferred and Immediate Implementation

Deferred and Immediate Implementation

CA Compress cannot support update in place for Physical Sequential data sets, and it does not support adding compressed records to a data set containing uncompressed data. For these reasons, Scheduled Implementation is inappropriate for PST data sets, but immediate and deferred compression are still supported by specifying the date compression is to take effect (EFFDATE=yyddd), or ANYDATE to specify that the data set should be immediately treated as compressed.