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The I/O limit feature is available in OpenVZ since kernel <code>2.6.32-042stab084.3</code> and [[vzctl]] <code>4.6</code>. This feature allows to limit disk I/O bandwidth available to a container.
== Example ==
root@host# vzctl set 777 --iolimit 3M --save
Setting iolimit: 3145728 bytes/sec
CT configuration saved to /etc/vz/conf/777.conf
root@host# vzctl enter 777
root@CT:/# cat /dev/urandom | pv -c - >/bigfile3
39.1MB 0:00:10 [ 3MB/s] [ <=> ]
^C
== Details ==
Limit works for reading and writing. There is also a burstable limit which allows 3x normal limit for a very short time.
== See also ==
* {{Man|vzctl|8}}, I/O scheduling
* [[http://openvz.livejournal.com/45831.html OpenVZ blog: Yay to I/O limits!]
* [[I/O priorities]]
* [[IO accounting]]
[[Category: Resource management]]
[[Category: HOWTO]]
== Example ==
root@host# vzctl set 777 --iolimit 3M --save
Setting iolimit: 3145728 bytes/sec
CT configuration saved to /etc/vz/conf/777.conf
root@host# vzctl enter 777
root@CT:/# cat /dev/urandom | pv -c - >/bigfile3
39.1MB 0:00:10 [ 3MB/s] [ <=> ]
^C
== Details ==
Limit works for reading and writing. There is also a burstable limit which allows 3x normal limit for a very short time.
== See also ==
* {{Man|vzctl|8}}, I/O scheduling
* [[http://openvz.livejournal.com/45831.html OpenVZ blog: Yay to I/O limits!]
* [[I/O priorities]]
* [[IO accounting]]
[[Category: Resource management]]
[[Category: HOWTO]]
