CA-L-Serv › Maintain Managed Files › Compress Files › COMPRESS Statement

COMPRESS Statement

You can use the COMPRESS statement to perform a compress operation by providing the following information:

• The ddname of the file that is to be compressed (on the CA-L-Serv INFILE parameter). This must match the ddname on the ADDFILE command.
• The ddname of the sequential file that temporarily holds the backup copy (on the CA-L-Serv WORKFILE parameter). The LDMAMS JCL must include a DD statement for this file.

For example, to compress the file FILE1 using a work file called TEMP1, specify a COMPRESS statement as follows:

//          EXEC  PGM=LDMAMS
//SSN$xxxx  DD    DUMMY
//SYSPRINT  DD    SYSOUT=A
//SYSIN     DD    *
  COMPRESS  INFILE(FILE1)   WORKFILE(TEMP1)
//TEMP1     DD    DSN=LSERV.TEMP

Note: A file can be compressed only if it was defined with the REUSE option of the DEFINE CLUSTER control statement of the IDCAMS utility.