Re: [libvirt] The design choice for how to enable block I/O throttling function in libvirt

On Tue, Aug 30, 2011 at 3:18 PM, shu ming&lt;shuming(a)linux.vnet.ibm.com&gt; wrote: > See commens below. > Zhi Yong Wu: >> HI, folks, >> >> I am trying to enable block I/O throttling function in libvirt. But >> currently i met some design questions, and don't make sure if we >> should extend blkiotune to support block I/O throttling or introduce >> one new libvirt command "blkiothrottle" to cover it or not. If you >> have some better idea, pls don't hesitate to drop your comments. >> >> If one new libvirt command "blkiothrottle" is introduced, I plan to >> design its usage syntax as below: >> >> virsh # help blkiothrottle >> NAME >> blkiothrottle - Set or display a block disk I/O throttle setting. >> >> SYNOPSIS >> blkiothrottle<domain> <device> [--bps<number>] [--bps_rd >> <number>] [--bps_wr<number>] [--iops<number>] [--iops_rd<number>] >> [--iops_wr<number>] >> >> DESCRIPTION >> Set or display a block disk I/O throttle setting. >> >> OPTIONS >> [--domain]<string> domain name, id or uuid >> [--device]<string> block device >> --bps<number> total throughput limits in bytes/s >> --bps_rd<number> read throughput limits in bytes/s >> --bps_wr<number> write throughput limits in bytes/s >> --iops<number> total operation limits in numbers/s >> --iops_rd<number> read operation limits in numbers/s >> --iops_wr<number> write operation limits in numbers/s >> > How to display the current I/O throttle setting of a specific block device > here? It will show as below: virtio0: bps=xxx, bps_rd=xxx, bps_wr=xxx, iops=xxx, iops_rd=xxx, iops_wr=xxx.