I have 6 mounted LVM volumes on a RAID0. I was generating files using FIO to fill up the volumes simultaneously. I see that FIO is using only one thread even though i have specified numjobs=6 in the jobfile. Its generating io with one thread sequentially from directory to directory. Numjobs seems to be working ok when i run directly on block devices using filename. # fio -v fio-2.2.6-25-g87f5 JobFile: # cat fileio.fio [fileio] ioengine=libaio rw=write directory=/mnt/lv0:/mnt/lv1:/mnt/lv2:/mnt/lv3:/mnt/lv4:/mnt/lv5 filesize=1m-40m nrfiles=1024 file_service_type=random:64 random_generator=tausworthe rate=,400m bs=8k numjobs=6 iodepth=32 scramble_buffers=1 blocksize_unaligned blocksize_range=8k-124k loops=1 percentage_random=100 random_distribution=random norandommap overwrite=1 iodepth_low=8 iodepth_batch=16 fill_device=1 refill_buffers=1 fsync=1024 prio=0 # fio --output=fio_test.out_15 fileio.fio Process tree: root 1308 0.0 0.2 43256 23508 ? Ss Apr03 1:50 SCREEN -Aa root 1309 0.0 0.0 14556 2632 pts/1 Ss+ Apr03 0:00 \_ bash root 2860 0.0 0.0 29032 748 pts/1 T Apr03 0:00 | \_ vim fio_dedup.out_3 root 1517 0.0 0.0 14548 2964 pts/2 Ss Apr03 0:00 \_ bash root 24413 12.0 2.1 296064 178336 pts/2 Dl+ 00:07 0:01 | \_ fio --output=fio_test.out_15 fileio.fio root 2768 0.0 0.0 14540 2208 pts/3 Ss Apr03 0:00 \_ bash root 24250 0.0 0.0 4512 868 pts/3 S+ Apr08 0:00 | \_ iostat -dxm /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/sdi 1 root 25483 0.0 0.0 14700 2948 pts/4 Ss Apr06 0:00 \_ bash root 24427 0.0 0.0 25560 1508 pts/4 R+ 00:08 0:00 | \_ ps auxf After filling each device, one thread ends and the other starts sequentially. There might be something wrong with tracking pid too. # fio --output=fio_test.out_15 fileio.fio fio: pid=0, err=28/file:filesetup.c:79, func=open, error=No space left on device fio: pid=0, err=28/file:filesetup.c:79, func=open, error=No space left on device fio: pid=0, err=28/file:filesetup.c:79, func=open, error=No space left on device fio: pid=0, err=28/file:filesetup.c:79, func=open, error=No space left on device Is there anything wrong with the parameters? -- Srinivasa R Chamarthy -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
