[global] blocksize_range=4k-512k iodepth=512 iodepth_batch=128 iodepth_low=256 ioengine=libaio size=1G io_size=4G filename= group_reporting thread numjobs=1 direct=1 rw=randwrite do_verify=1 verify=md5 verify_backlog=1024 fsync_on_close=1 [nvme-host]