Dynamic threshold in VerticalVmCpuScalingExample

Sarah Ali

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Apr 27, 2018, 5:09:53 AM4/27/18

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Greetings

How to implement a dynamic threshold autoscaling in VerticalVmCpuScalingExample. Is there any built-in method that provides a dynamic threshold.

Manoel Campos

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Apr 27, 2018, 11:15:47 AM4/27/18

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Some VmAllocationPolicy implementations in the package org.cloudbus.cloudsim.allocationpolicies.migration, computes dynamic threshold based on some metrics such as Median Absolute Deviation (MAD) and Local Regression (LR).

They use host utilization history to compute such metrics to define a dynamic threshold. Check the VmAllocationPolicyMigrationMedianAbsoluteDeviation for example (the method computeHostUtilizationMeasure).

You can use the Vm.getUtilizationHistory() to get the CPU utilization history for a given VM. Check the method documentation for details.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering Ph.D. Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

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On Fri, Apr 27, 2018 at 6:09 AM, Sarah Ali <sarah.al...@gmail.com> wrote:

Greetings

How to implement a dynamic threshold autoscaling in VerticalVmCpuScalingExample. Is there any built-in method that provides a dynamic threshold.

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Sarah Ali

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Apr 28, 2018, 7:38:25 AM4/28/18

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Hello,

would you please help on implementing this method in this VerticalVmCpuScalingExample or LoadBalancerByHorizontalVmScalingExample. I've been trying to mimic MigrationExample1 to get the utilization history of the VM but I couldn't apply it.

On Friday, April 27, 2018 at 6:15:47 PM UTC+3, Manoel Campos wrote:

Some VmAllocationPolicy implementations in the package org.cloudbus.cloudsim.allocationpolicies.migration, computes dynamic threshold based on some metrics such as Median Absolute Deviation (MAD) and Local Regression (LR).
They use host utilization history to compute such metrics to define a dynamic threshold. Check the VmAllocationPolicyMigrationMedianAbsoluteDeviation for example (the method computeHostUtilizationMeasure).

You can use the Vm.getUtilizationHistory() to get the CPU utilization history for a given VM. Check the method documentation for details.

Manoel Campos da Silva Filho Software Engineer
Computer Science and Engineering Ph.D. Student at University of Beira Interior (Portugal)
Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)
http://manoelcampos.com

about.me

On Fri, Apr 27, 2018 at 6:09 AM, Sarah Ali <sarah.al...@gmail.com> wrote:

Greetings

How to implement a dynamic threshold autoscaling in VerticalVmCpuScalingExample. Is there any built-in method that provides a dynamic threshold.

--
If you received an answer that worked for you, please be kind and reply to let everybody knows it worked.
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Manoel Campos

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Apr 28, 2018, 6:33:49 PM4/28/18

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Defining a dynamic threshold is very simple.

Check the new VerticalVmCpuScalingDynamicThreshold and its upperCpuUtilizationThreshold method.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering Ph.D. Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

about.me

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Sarah Ali

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Apr 28, 2018, 8:33:59 PM4/28/18

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Thank you, but there is no such a class (VerticalVmCpuScalingDynamicThreshold)

Sarah Ali

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Apr 28, 2018, 10:38:00 PM4/28/18

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I'm getting this error after I deleted the old project and upload the most recent one.

Manoel Campos

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Apr 28, 2018, 11:38:52 PM4/28/18

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Download it again (I've just updated) and execute mvn clean install at the CloudSim Plus root folder every time you download a new version.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering Ph.D. Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

about.me

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Sarah Ali

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Apr 29, 2018, 1:30:55 AM4/29/18

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Still the same error

Manoel Campos

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Apr 29, 2018, 2:39:42 AM4/29/18

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You're not inside the project's root directory.

Manoel Campos da Silva Filho Software Engineer

Computer Science and Engineering Ph.D. Student at University of Beira Interior (Portugal)

Professor at Federal Institute of Education, Science and Technology of Tocantins (Brazil)

http://manoelcampos.com

about.me

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Sarah Ali

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Apr 29, 2018, 2:40:51 AM4/29/18

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It’s working now. Thank you very much

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