Hi, all Nice to meet you. I'm new to device-mapper. I'd like to use dm-ioband because it would be useful for virtual environment(kvm, xen). So I tested dm-ioband, and my test results are below. I hope it's a help that dm-ioband is committed to mainline. Any comments are welcome. Tested-by: Akio Takebe <takebe_akio@xxxxxxxxxxxxxx> Test Discription: Reference: http://people.valinux.co.jp/~ryov/bwctl/ Setup infomation: 1. compile and loading module http://people.valinux.co.jp/~ryov/bwctl/ http://people.valinux.co.jp/~ryov/dm-ioband/manual/setup.html 2. setup dmioband # echo "0 $(blockdev --getsize /dev/sdb7) ioband /dev/sdb7 1 0 0 none" "weight 0 :40" | dmsetup create ioband1 # echo "0 $(blockdev --getsize /dev/sdb8) ioband /dev/sdb8 1 0 0 none" "weight 0 :10" | dmsetup create ioband2 # mkfs.ext3 /dev/mapper/ioband1 # mkfs.ext3 /dev/mapper/ioband2 # mount /dev/mapper/ioband1 /mnt1 # mount /dev/mapper/ioband2 /mnt2 Test Items - load/unload module : OK - dmsetup targets show ioband: OK - Performance test results (fio) Summary of results throughput [KiB/s] % of throughput of device weight(%) read write total ioband1 + ioband2 ioband1 40(80%) 328 335 663 79.59% ioband2 10(20%) 87 83 170 20.41% - I/O load (dd): I used some I/O load with dd command. I confirmed that the filesystem didn't break down. The files written by dd were also sane. Best Regards, Akio Takebe -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
