CKPT

Specifies the interval for checkpoints taken during a file transfer.

0 to 9999 records: Specifies the number of records to transfer for a checkpoint interval.

Notes:

The checkpoint/restart facility resumes interrupted transfers from the point at which the most recent checkpoint was taken.
Each time a checkpoint is taken, the output buffers on the receiving system are written to the disk. A checkpoint interval that is too short slows down file transfers; a checkpoint interval that is too long increases the risk of data loss. We recommend that you set the checkpoint count to at least 1000. On Token Ring, Ethernet, and other high‑speed networks, the checkpoint count should be set to the highest allowable value, if needed.
If the receiving system is z/OS or VSE, the checkpoint count should be set to a multiple of the blocking factor. For example, if the DCB attributes are RECFM=FB LRECL=80 BLKSIZE=8000, the checkpoint count should be a multiple of 100.

Default: Taken from the CA XCOM Data Transport default options table.