Messages in this thread | | | From | Andrea Righi <> | Subject | [PATCH 0/3] cgroup: block device i/o bandwidth controller (v2) | Date | Sat, 7 Jun 2008 00:27:27 +0200 |
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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
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