The Batch Interface › SYSIN01 Parameters › SYSIN01 Parameters Required by FILETYPE=FILE › PACK

PACK

Indicates whether record packing is used. It can substantially improve performance.

CRLF

Inserts a carriage return (CR) and line feed (LF) characters at the end of each record. This is the packing type used for most CA XCOM Data Transport platforms.

LENGTH

Specifies that the records are to be 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 2K but it can be increased to 31K 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), record separators are inserted. No separators are inserted in binary files transferred with PACK=LENGTH.

NO

No record packing is used.

Notes:

• PACK=LENGTH with MAXPACK=31744 should be 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's 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).
• Specifying a value other than NO will enable use of zIIP to perform the compression function. zIIP processing will be used for compression only if the buffer size to compress is >= 4096 bytes. It is recommended to specify PACK=LENGTH and use a high MAXPACK value (>= 4096) for TCP/IP transfers or RUSIZE (>=4096) for SNA transfers to make the most efficient use of zIIP.

Default: NO