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https://issues.apache.org/jira/browse/YARN-6460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julien Vaudour updated YARN-6460:
---------------------------------
Description:
Be able to accelerate time in SLS.To do that, a {{timescalefactor}} parameter
is introduced (default value = 1)
With if we use a time factor of X, time in simulation will be X times faster
than real. Time in generated CSV will be modified a well to have the same
result as if we don't use {{timescalefactor}}.
For example, it permits to run a simulation of one week of jobs in just one day
if we use {{timescalefactor=7}}
To do that a ScaleClock object has been introduced, which implements
{{org.apache.hadoop.yarn.util.Clock}}. It also extends
{{com.codahale.metrics.Clock}} for metrics reported in csv.
All objects used for the simulation now use a shared reference to a
{{org.apache.hadoop.yarn.util.Clock}} instance to get current time instead of
using {{System.currentTimeMillis()}}
A new optionnal parameter {{--timescalefactor=<factor>}} has been introduced on
{{slsrun.sh}} script.
was:Be able to accelerate time in sls
> Accelerated time in SLS
> -----------------------
>
> Key: YARN-6460
> URL: https://issues.apache.org/jira/browse/YARN-6460
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler-load-simulator
> Reporter: Julien Vaudour
> Assignee: Julien Vaudour
> Priority: Minor
> Attachments: YARN-6460.000.patch, YARN-6460.001.patch,
> YARN-6460-branch-2.000.patch, YARN-6460-branch-2.001.patch
>
>
> Be able to accelerate time in SLS.To do that, a {{timescalefactor}} parameter
> is introduced (default value = 1)
> With if we use a time factor of X, time in simulation will be X times faster
> than real. Time in generated CSV will be modified a well to have the same
> result as if we don't use {{timescalefactor}}.
> For example, it permits to run a simulation of one week of jobs in just one
> day if we use {{timescalefactor=7}}
> To do that a ScaleClock object has been introduced, which implements
> {{org.apache.hadoop.yarn.util.Clock}}. It also extends
> {{com.codahale.metrics.Clock}} for metrics reported in csv.
> All objects used for the simulation now use a shared reference to a
> {{org.apache.hadoop.yarn.util.Clock}} instance to get current time instead of
> using {{System.currentTimeMillis()}}
> A new optionnal parameter {{--timescalefactor=<factor>}} has been introduced
> on {{slsrun.sh}} script.
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