Configuration Parameters › Destination Parameters for Single LUs, Groups of LUs, and Single IPNAMEs › PACK

PACK

This parameter indicates whether record-packing is used and it can substantially improve performance.

CRLF

Specifies that carriage returns and line feed characters is inserted at the end of each record. All systems use this type of record packing.

LENGTH

Specifies that the records are packed into fixed-size data transfer blocks. Each record begins with a 2-byte long prefix that indicates the length of the record and determines how many records can be packed into a block. The default block size is 2 K but it can be increased to 31 K by using the MAXPACK parameter in the CA XCOM Data Transport Default Options Table or in the CA XCOM Data Transport control library member.

When transferring a text file to a partner that supports record separators (for example, CRLF (0D0A) on Windows and LF (0A) on UNIX). The record separators are inserted. No separators are inserted in binary files that are transferred with PACK=LENGTH.

NO

Specifies that no record packing is used.

Default: NO

Notes:

• PACK=LENGTH with MAXPACK=31744 is selected when using CA XCOM Data Transport over TCP/IP. If PACK=LENGTH is coded, then you must also code RECSEP=NO.
• Platforms that support PACK=LENGTH are IBM AS/400, UNIX-based systems, and z/OS systems. See the appropriate documentation for the platform to see if this value is supported.
• For more information, see Pack Data Records in the chapter The Menu Interface (TSO/ISPF Panels) in the CA XCOM Data Transport for z/OS User Guide.
• For Unicode-based transfers (CODE=UTF8 or CODE=UTF16), PACK=LENGTH is enforced for the transfer. An informational message is issued when a transfer is modified to use PACK=LENGTH. This is for performance considerations in performing data conversion.