Meng Zhu created MESOS-9780:
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Summary: Improve "picky" framework resource allocation under
random sorter.
Key: MESOS-9780
URL: https://issues.apache.org/jira/browse/MESOS-9780
Project: Mesos
Issue Type: Improvement
Components: allocation
Reporter: Meng Zhu
Picky frameworks are frameworks that are interested in some particular set of
resources.
With the current offer model, such a framework usually keeps declining and
filter uninterested offers until accepting an offer that meets its needs.
While picky frameworks are always prone to performance issues. These frameworks
are more likely to experience offer starvation issues under random sorter than
the DRF sorter.
Under DRF sorter, declining offers or Mesos side resource filtering do not
affect the framework's dominant resource share. Since other frameworks might
get resource allocated at the same time which brings up their shares
comparatively, a declined/filtered framework would usually have a higher chance
of getting other offers as time goes by (if it keeps declining). This reduces
the time such a framework getting what it wants eventually.
Random sorter, however, is stateless. A decline or filter action has no effect
on the chance of a framework getting offers. A framework declining or filtering
an offer essentially wastes a shot for nothing. It becomes a truly altruistic
act with no perceived gain on the framework side. This makes the random sorter
likely to perform poorly compared to DRF in terms of handling picky frameworks.
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