Jie Yu created MESOS-2818:
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Summary: Pass 'allocated' resources for each executor to the
resource estimator.
Key: MESOS-2818
URL: https://issues.apache.org/jira/browse/MESOS-2818
Project: Mesos
Issue Type: Task
Reporter: Jie Yu
Resource estimator obviously need this information to calculate, say the usage
slack. Now the question is how. There are two approaches:
1) Pass in the allocated resources for each executor through the
'oversubscribable()' interface.
2) Let containerizer return total resources allocated for each container when
'usages()' are invoked.
I would suggest to take route (1) for several reasons:
1) Eventually, we'll need to pass in slave's total resources to the resource
estimator (so that RE can calculate allocation slack). There is no way that we
can get that from containerizer. The slave's total resources keep changing due
to dynamic reservation. So we cannot pass in the slave total resources during
initialization.
2) The current implementation of usages() might skip some containers if it
fails to get statistics for that container (not an error). This will cause
in-complete information to the RE.
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