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https://issues.apache.org/jira/browse/AURORA-1181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxim Khutornenko updated AURORA-1181:
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Assignee: David Robinson
> optimize host_drain to speed up maintenance
> -------------------------------------------
>
> Key: AURORA-1181
> URL: https://issues.apache.org/jira/browse/AURORA-1181
> Project: Aurora
> Issue Type: Task
> Components: Maintenance
> Reporter: David Robinson
> Assignee: David Robinson
> Priority: Minor
>
> Aurora's maintenance primitives, whilst great, can be frustrating to use when
> dealing with large clusters, primarily due to the speed of draining hosts.
> The host_drain feature does accept a grouping function that can be used to
> drain hosts in batches, but for large clusters we typically don't want to
> arbitrarily divide the cluster into groups/batches and would prefer instead
> to drain everything that was requested, where possible, without violating the
> SLA.
> eg, 100 hosts in need of maintenance, with each host running 1 task (of many)
> from 100 different jobs -- all 100 hosts could be drained simultaneously
> without violating the SLA.
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