[global] ioengine=spdk_bdev spdk_json_conf=${FTL_JSON_CONF} filename=${FTL_BDEV_NAME} thread=1 direct=1 iodepth=128 rw=randwrite verify=crc32c do_verify=1 verify_dump=0 verify_state_save=0 verify_backlog=5000 verify_fatal=1 bs=4k random_distribution=normal serialize_overlap=1 io_size=256M [first_half] offset=0% size=50% [second_half] offset=50%