Hi, Ryo Tsuruta wrote: > The results of bandwidth control test on band-groups. > ===================================================== > The configurations of the test #3: > o Prepare three partitions sdb5 and sdb6. > o Create two extra band-groups on sdb5, the first is of user1 and the > second is of user2. > o Give weights of 40, 20, 10 and 10 to the user1 band-group, the user2 > band-group, the default group of sdb5 and sdb6 respectively. > o Run 128 processes issuing random read/write direct I/O with 4KB data > on each device at the same time. you mean that you run 128 processes on each user-device pairs? Namely, I guess that user1: 128 processes on sdb5, user2: 128 processes on sdb5, another: 128 processes on sdb5, user2: 128 processes on sdb6. > Conclusions and future works > ============================ > Dm-band works well with random I/Os. I have a plan on running some tests > using various real applications such as databases or file servers. > If you have any other good idea to test dm-band, please let me know. The second preliminary studies might be: - What if you use a different I/O size on each device (or device-user pair)? - What if you use a different number of processes on each device (or device-user pair)? And my impression is that it's natural dm-band is in device-mapper, separated from I/O scheduler. Because bandwidth control and I/O scheduling are two different things, it may be simpler that they are implemented in different layers. Regards, Hiroya. > > Thank you, > Ryo Tsuruta. > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
