lkml.org 
[lkml]   [2008]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/3] i/o bandwidth controller documentation
Randy Dunlap wrote:
> On Sat, 7 Jun 2008 00:27:28 +0200 Andrea Righi wrote:
>
>> Documentation of the block device I/O bandwidth controller: description, usage,
>> advantages and design.
>>
>> Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
>> ---
>> Documentation/controllers/io-throttle.txt | 150 +++++++++++++++++++++++++++++
>> 1 files changed, 150 insertions(+), 0 deletions(-)
>> create mode 100644 Documentation/controllers/io-throttle.txt
>>
>> diff --git a/Documentation/controllers/io-throttle.txt b/Documentation/controllers/io-throttle.txt
>> new file mode 100644
>> index 0000000..5373fa8
>> --- /dev/null
>> +++ b/Documentation/controllers/io-throttle.txt
>> @@ -0,0 +1,150 @@
>> +
>> + Block device I/O bandwidth controller
>> +
>> +1. Description
>> +
>> +This controller allows to limit the I/O bandwidth of specific block devices for
>> +specific process containers (cgroups) imposing additional delays on I/O
>> +requests for those processes that exceed the limits defined in the control
>> +group filesystem.
>> +
>> +Bandwidth limiting rules offer better control over QoS with respect to priority
>> +or weight-based solutions that only give information about applications'
>> +relative performance requirements.
>> +
>> +The goal of the I/O bandwidth controller is to improve performance
>> +predictability and QoS of the different control groups sharing the same block
>> +devices.
>> +
>> +NOTE: if you're looking for a way to improve the overall throughput of the
>> +system probably you should use a different solution.
>> +
>> +2. User Interface
>> +
>> +A new I/O bandwidth limitation rule is described using the file
>> +blockio.bandwidth.
>> +
>> +The same file can be used to set multiple rules for different block devices
>> +relatively to the same cgroup.
>
> relative
>

I will fix it in the next version.

Thanks again Randy.

-Andrea


\
 
 \ /
  Last update: 2008-06-12 00:55    [from the cache]
©2003-2011 Jasper Spaans