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From Meng Zhu <m...@mesosphere.io>
Subject Re: Review Request 66984: Added the ability to exhaustively allocate declined resources.
Date Mon, 07 May 2018 21:02:58 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/66984/
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(Updated May 7, 2018, 2:02 p.m.)


Review request for mesos, Benjamin Mahler, Kapil Arya, Till Toenshoff, and Vinod Kone.


Changes
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Added a todo to check invariants.


Repository: mesos


Description
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Schedulers that are below their fair share will continue to get
allocated resources even if they don't need those resources. The
expected behavior here is that schedulers will decline those resources
for a long time (or forever). Not all schedulers do this, however,
which means that some schedulers might get _starved_ of
resources. Technically these schedulers are already at or above their
fair share, but some operators feel that this is keeping the cluster
underutilized.

Rather than guarantee that all schedulers will decline with large
timeouts this patch ensures that all other schedulers will see
resources from the declined agent before they see resources from that
agent again, even if there are now more resources available on that
agent.


Diffs (updated)
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  src/master/allocator/mesos/hierarchical.hpp 955ae3e6a9e3c790fb260311ec4b4ef725a826d3 
  src/master/allocator/mesos/hierarchical.cpp 1000968be6a2935a4cac571414d7f06d7df7acf0 


Diff: https://reviews.apache.org/r/66984/diff/3/

Changes: https://reviews.apache.org/r/66984/diff/2-3/


Testing
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make check
Need to add dedicated tests.


Thanks,

Meng Zhu


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