Messages in this thread |  | | | Date | Thu, 12 Jun 2008 00:51:57 +0200 | | From | Andrea Righi <> | | Subject | Re: [PATCH 1/3] i/o bandwidth controller documentation |
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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
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