COMPRESS

Use the COMPRESS keyword to compress data segments before the segments are inserted to a DEDB.

You must be using a compression product where compression is controlled by the DBD. If you are using a compression product where compression is controlled by something other than the DBD, this keyword has no effect.

Use

COMPRESS is an optional keyword for the following commands:

RELOAD
REORGANIZE
UNLOAD

Note

The COMPRESS keyword can be used with the REORGANIZE command only if you are running BMC Software’s DATA PACKER/IMS product. Fast Path Reorg/EP will use the keyword value SELECT_UOW=ALL to ensure that all segments are reorganized and recompressed.

Related keywords

EXPAND
SELECT_UOW

Syntax

 COMPRESS=parameter
COMPRESS=(parameter1, parameter2, ..., parametern)

Parameters

Specify one or more of the following parameter values:

Value	Description
NO (default)	Do not invoke compression.
YES	Compress the data before the segment is processed.
1-character to 8-character segment name	Compress only the specified segment or segments. This value can be used more than once to specify specific segments using the (parameter1,parameter2, ..., parametern) syntax shown above.

Note

If you request compression by specifying either COMPRESS=YES or COMPRESS=segment name(s), the compression routine must be present in the appropriate library. Refer to the DD statements IMSRESLB, OLDRESLB, and STEPLIB.

Default

COMPRESS=NO

Alias

CMP