> On Dec. 30, 2015, 8:42 p.m., Klaus Ma wrote:
> > src/master/allocator/mesos/hierarchical.cpp, line 1321
> > <https://reviews.apache.org/r/40632/diff/8/?file=1178313#file1178313line1321>
> >
> >     As framework can not use ALLOCATION_SLACK mixed with other resources, 
> > allocator need to check seperatly.
> 
> Guangya Liu wrote:
>     Yes, currently the validation logic in master is 
> https://github.com/apache/mesos/blob/master/src/master/validation.cpp#L479-L488
>  which can make sure a task and its executor can either use non-revocable 
> resources or revocable resources of a given name but not both. After we 
> introduced the allocation slack, we may want to guard that a task and its 
> executor can either use allocation slack or usage slack or non-revocable 
> resources but not all. I will upload a patch to handle this part.
> 
> Guangya Liu wrote:
>     Fixed in https://reviews.apache.org/r/41848/
> 
> Joseph Wu wrote:
>     Note: mixing resources is allowed.  Everything in a container is evicted 
> at once, including non-revocable resources mixed into a revocable one.

re 'Note: mixing resources is allowed.', my understanding is that: different 
tasks can use different resources, but one task can NOT use mixing resources; 
for example, one task can not use both `USAGE_SLACK` and `ALLOCATION_SLACK`.


> On Dec. 30, 2015, 8:42 p.m., Klaus Ma wrote:
> > src/master/allocator/mesos/hierarchical.cpp, line 1334
> > <https://reviews.apache.org/r/40632/diff/8/?file=1178313#file1178313line1334>
> >
> >     In this check, it seems allocator send offer when both !allocation & 
> > allocation are enough.
> 
> Joseph Wu wrote:
>     Looks like quota might have stepped on the toes of oversubscription.  
> I'll double-check with Joris/AlexR.
> 
> Guangya Liu wrote:
>     Not quite clear about the problem, can you elaborate? Joseph?

@Joseph, the Quota only handle `unreserved.nonRevocable` resources; so 
`USAGE_SLACK` are not included in Quota.


- Klaus


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On Jan. 8, 2016, 2:55 p.m., Guangya Liu wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/40632/
> -----------------------------------------------------------
> 
> (Updated Jan. 8, 2016, 2:55 p.m.)
> 
> 
> Review request for mesos, Ben Mahler, Artem Harutyunyan, Joris Van 
> Remoortere, Joseph Wu, Klaus Ma, and Jian Qiu.
> 
> 
> Bugs: MESOS-4145
>     https://issues.apache.org/jira/browse/MESOS-4145
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Enabled oversubscribed resources for reservations in allocator.
> 
> There are three patches handling the allocator part:
> 1) This patch handles send offer, add slave and quota integration test.
> 2) https://reviews.apache.org/r/41847/ Handles the case of update slave.
> 3) https://reviews.apache.org/r/41791/ Handles the case of dynamic 
> reservations.
> 
> 
> Diffs
> -----
> 
>   src/master/allocator/mesos/hierarchical.cpp 
> df8bccaf2b8cfc0cb5ca18d4867371ae7a84c12f 
>   src/tests/hierarchical_allocator_tests.cpp 
> e044f832c2c16e53e663c6ced5452649bb0dcb59 
> 
> Diff: https://reviews.apache.org/r/40632/diff/
> 
> 
> Testing
> -------
> 
> make
> make check
> 
> 
> Thanks,
> 
> Guangya Liu
> 
>

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