The IBM® Connect:Direct® checkpoint/restart file contains positioning information for both files involved in executing a COPY statement. IBM Connect:Direct maintains the checkpoint records throughout data transmission and deletes them when a transmission completes successfully.
Note: Checkpoints take place on the receiving end of a transfer. During restart, this information is exchanged with the sender so that appropriate positioning can take place.
A checkpoint record can be left in the Checkpoint file if an interrupted Process is deleted by the operator. IBM Connect:Direct scans the checkpoint records during initialization and deletes records older than the value specified in the CKPT.DAYS initialization parameter.