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Add support for blkio.weight_device #13959
Add support for blkio.weight_device #13959
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can you add an integration-cli test, other wise i see nothing wrong here |
@@ -1128,6 +1128,13 @@ func (s *DockerSuite) TestRunWithBlkioInvalidWeight(c *check.C) { | |||
} | |||
} | |||
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func (s *DockerSuite) TestRunWithBlkioInvalidWeightDevice(c *check.C) { |
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oops my b i see this now
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but we could use a valid one too
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Hi @jfrazelle I planted to add a valid one. But it seems it's not easy to find out what block device does the janky have.
@Mashimiao Thanks for the contrib! Please see the comments above. |
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@@ -83,6 +84,9 @@ The initial status of the container created with **docker create** is 'created'. | |||
**--blkio-weight**=0 | |||
Block IO weight (relative weight) accepts a weight value between 10 and 1000. | |||
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**--blkio-weight-device**=[] | |||
Block IO weight (relative weight for device). |
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can you add (device:weight)?
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added
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@@ -392,6 +394,7 @@ Return low-level information on the container `id` | |||
"HostConfig": { | |||
"Binds": null, | |||
"BlkioWeight": 0, | |||
"BlkioWeightDevice": [{}], |
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Not your fault, but it looks like the rest of this example uses tabs for indentation 😞
Can you change to tabs to match the other lines? (just for this instance, because we normally use spaces)
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fixed
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@@ -623,6 +623,7 @@ container: | |||
| `--cpuset-mems=""` | Memory nodes (MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems. | |
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@Mashimiao Thank you for the contribution. You missed some tics in there and there are also some slightly awkward structs. Please move the note which states a limitation to the top of the section.
---> https://gist.github.com/moxiegirl/a7bc16b00dbdb0c45bac
Block IO bandwidth (Blkio) constraint
By default, all containers get the same proportion of block IO bandwidth
(blkio). This proportion is 500. To modify this proportion, change the
container's blkio weight relative to the weighting of all other running
containers using the --blkio-weight
flag.
Note: The blkio weight setting is only available for direct IO. Buffered IO
is not currently supported.
The --blkio-weight
flag takes a weight between 10 to 1000.
For example, the commands below create two containers with different blkio
weight:
$ docker run -ti --name c1 --blkio-weight 300 ubuntu:14.04 /bin/bash
$ docker run -ti --name c2 --blkio-weight 600 ubuntu:14.04 /bin/bash
If you do block IO in the two containers at the same time, for example:
$ time dd if=/mnt/zerofile of=test.out bs=1M count=1024 oflag=direct
You'll find that the proportion of time is the same as the proportion of blkio
weights of the two containers.
The --blkio-weight-device="DEVICE_NAME:WEIGHT"
flag sets a specific device
weight. The DEVICE_NAME:WEIGHT
is a string containing a colon-separated device
name and weight. For example, to set /dev/sda
device weight to 200
:
$ docker run -it \
--blkio-weight-device "/dev/sda:200" \
ubuntu
If you specify both the --blkio-weight
and --blkio-weight-device
, Docker
uses the --blkio-weight
as the default weight and uses --blkio-weight-device
to override with a different weight on a specific device. The following example uses a default weight of 300
and overrides this default
on /dev/sda
setting with a weight of 200
:
$ docker run -it \
--blkio-weight 300 \
--blkio-weight-device "/dev/sda:200" \
ubuntu
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Thanks, fixed
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@Mashimiao did you push your changes? I see the note is still at the bottom (havent checked other changes)
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@thaJeztah sorry, I forgot to push my changes
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A pfew almost thought I needed new glasses 👓 haha
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erm, but I still don't see the changes?
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@thaJeztah Sorry, forgot to modify. Already fixed
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Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>
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Thanks @Mashimiao! docs LGTM ping @moxiegirl PTAL |
LGTM thank you @Mashimiao for your patience. @thaJeztah as you like sir! |
restarting the userns and windows builds for good measure |
@thaJeztah it's green, merging 😉 |
Add support for blkio.weight_device
Signed-off-by: Ma Shimiao mashimiao.fnst@cn.fujitsu.com