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From "Guangya Liu" <gyliu...@gmail.com>
Subject Re: Review Request 42559: Allocated resources as revocable beyond quota.
Date Thu, 21 Jan 2016 01:48:10 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/42559/#review115537
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src/master/allocator/mesos/hierarchical.cpp (line 1310)
<https://reviews.apache.org/r/42559/#comment176515>

    The `resource` will include some `reserved` resources, here even if you call `resource.mutable_revocable();`,
the `reserved` resources will still be considered as `reserved`.
    
    Take a look at isReserved()
    
    bool Resources::isReserved(
        const Resource& resource,
        const Option<string>& role)
    {
      if (role.isSome()) {
        return !isUnreserved(resource) && role.get() == resource.role();
      } else {
        return !isUnreserved(resource);
      }
    }
    
    bool Resources::isUnreserved(const Resource& resource)
    {
      return resource.role() == "*" && !resource.has_reservation();
    }
    
    For a resources such as `cpus(r1):100`, after call `resource.mutable_revocable();`, it
will be `cpus(r1){REV}:100`, and the helper function `isReserved(resources, role)` still treate
this as `reserved` resources but not `revocable` resources.
    
    This has highly dependency and interaction with MESOS-1607,the optimisitic offer phase
1, in phase 1, we are planning to treate the `reserved but not used` as `allocation slack`,
it is not right if you simply translating all `resources` to `revocable`, you may want at
least filter out the `reserved` resources when translating to `revocalbe` resources.
    
    I would suggest you also invite bmahler as review as he may be the shephard for MESOS-1607


- Guangya Liu


On 一月 20, 2016, 5:01 p.m., Alexander Rukletsov wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/42559/
> -----------------------------------------------------------
> 
> (Updated 一月 20, 2016, 5:01 p.m.)
> 
> 
> Review request for mesos, Bernd Mathiske, Joris Van Remoortere, Joseph Wu, and Qian Zhang.
> 
> 
> Bugs: MESOS-4441
>     https://issues.apache.org/jira/browse/MESOS-4441
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> See summary.
> 
> 
> Diffs
> -----
> 
>   docs/quota.md 1a6d2f07fb74d168a7eb30764ab9ff80cea5e3b6 
>   src/master/allocator/mesos/hierarchical.cpp e32ee4aa3ed9793bb5a99233e699e5cc2bdd796b

>   src/tests/hierarchical_allocator_tests.cpp 953712149bd951789beb29c72779c4ac65aa48dc

> 
> Diff: https://reviews.apache.org/r/42559/diff/
> 
> 
> Testing
> -------
> 
> On Mac OS 10.10.4:
> 
> `GTEST_FILTER="HierarchicalAllocatorTest.*" ./bin/mesos-tests.sh --gtest_repeat=100 --gtest_break_on_failure
--gtest_shuffle`
> `make check`
> 
> Updated `HierarchicalAllocatorTest.DRFWithQuota` succeeds with the change and fails without.
> 
> 
> Thanks,
> 
> Alexander Rukletsov
> 
>


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