VM IOPS check for OpenVZ and KVM

[jinjer]

This might be a FAQ, but I can't find the answer.

Is there a way to check IOPS (not just disk bytes read/written) from an OpenVZ container (and kvm ... perhaps).

I need to limit iops from containers to a maximum value of say 50 iops and throttle "abusers" until they slow-down disk requests.

jinjer

 

[spirit]

I'm using "fio" benchmark for this


random read: (iops)
fio --filename=/dev/[device] --direct=1 --rw=randread --bs=4k --size=1G --iodepth=100 --runtime=120 --group_reporting --name=file1 --ioengine=libaio

random read: (iops)
fio --filename=/dev/[device] --direct=1 --rw=randwrite --bs=4k --size=1G --iodepth=100 --runtime=120 --group_reporting --name=file1 --ioengine=libaio



seq read: (bandwith)
fio --filename=/dev/[device] --direct=1 --rw=read --bs=4M --size=1G --iodepth=100 --runtime=120 --group_reporting --name=file1 --ioengine=libaio

seq write: (bandwith)
fio --filename=/dev/[device] --direct=1 --rw=write --bs=4M --size=1G --iodepth=100 --runtime=120 --group_reporting --name=file1 --ioengine=libaio

 

[jinjer]

Sorry, I might have not expressed myself clearly.

What I need is to measure the iops used from an openvz container from the "host" so that I can block abusers and/or limit them to a certain io.

In openvz there's a way to prioritize io for containers on 8 different levels using the cbq scheduler on the block device holding the openvz roots, however there must be a way to know which containers to penalize and which ones to keep at a default level.

VMWare has a setting for iops on each virtual machine.

KVM could use some tweaks but its probably possible to get iops on the containing lvm/dm device.

There are graphs in proxmox for openvz container disk activity, but it shows disk read/write in bytes. Perhaps there's a way to hack an iops metric too?