[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] How to Allocate Disk Bandwidth among VMs?
Hi Tom, # I'm sorry, I sent an empty e-mail a while ago. > I want to do disk I/O rate control over VMs. Therefore, I want to > allocate different disk I/O bandwidth for different Xen VMs on my host > machine. All domainUs use file-backed VBDs stored in domain0's file system. > Do you have any idea to do that? Hopefully it can be done by modifying > Xend in domain0. You can use dm-ioband for this purpose. dm-ioband is an I/O bandwidth controller implemented as a device-mapper driver and can control bandwidth on per partition, per user, per process basis. In this case, install dm-ioband to the host OS, create a dm-ioband device on the disk which stores domainU's VBD files, and then assign bandwidth(determined proportional to the weight of each disk) to each virtual machine. There is an example configuration available at: "Example #5: Bandwidth control for Xen blktap devices" http://sourceforge.net/apps/trac/ioband/wiki/dm-ioband/man/examples Please see the following URL for more information, kernel patch files and binary packages for RHEL5 and CentOS5 are availble. http://sourceforge.net/apps/trac/ioband/wiki/dm-ioband Please feel free to ask me if you have any questions. Thanks, Ryo Tsuruta _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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