[PATCH 0/3] cgroup: block device i/o bandwidth controller (v2)

[PATCH 0/3] cgroup: block device i/o bandwidth controller (v2)

[Andrea Righi]

The goal of the i/o bandwidth controller is to improve i/o performance
predictability and provide better QoS for different cgroups sharing the same
block devices.

Respect to other priority/weight-based solutions the approach used by this
controller is to explicitly choke applications' requests that directly (or
indirectly) generate i/o activity in the system.

The direct bandwidth limiting method has the advantage of improving the
performance predictability at the cost of reducing, in general, the overall
performance of the system (in terms of throughput).

Detailed informations about design, its goal and usage are described in the
documentation.

Tested against latest git (2.6.26-rc5).

The all-in-one patch can be found at:
http://download.systemimager.org/~arighi/linux/patches/io-throttle/

Previous version and test report can be found here:
http://lkml.org/lkml/2008/5/24/97

Changelog since v1:
* support multiple per-block device i/o limiting rules
* minor optimizations in cgroup_io_account()
* updated the documentation and fixed some typos (thanks to Randy Dunlap for
  reviewing)

-Andrea

Re: [PATCH 0/3] cgroup: block device i/o bandwidth controller (v2)

[Balbir Singh]

Andrea Righi wrote:
> The goal of the i/o bandwidth controller is to improve i/o performance
> predictability and provide better QoS for different cgroups sharing the same
> block devices.
> 
> Respect to other priority/weight-based solutions the approach used by this
> controller is to explicitly choke applications' requests that directly (or
> indirectly) generate i/o activity in the system.
> 
> The direct bandwidth limiting method has the advantage of improving the
> performance predictability at the cost of reducing, in general, the overall
> performance of the system (in terms of throughput).
> 
> Detailed informations about design, its goal and usage are described in the
> documentation.
> 

I'll read through the documentation and comment.

> Tested against latest git (2.6.26-rc5).
> 
> The all-in-one patch can be found at:
> http://download.systemimager.org/~arighi/linux/patches/io-throttle/
> 

Cool! thanks for doing this, it's useful.

> Previous version and test report can be found here:
> http://lkml.org/lkml/2008/5/24/97


-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL