Checkpoint User Interface
int tcs_open_write(char *prefix); // return LUN
int tcs_open_read(char *prefix); // “ “
int tcs_close(int *lun, int *keep);
int tcs_read(int *lun, void *A, int *len, int *datasize);
int tcs_write(int *lun, void *A, int *len, uint *datasize);
Is this job being restarted?