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https://issues.apache.org/jira/browse/MESOS-9806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16913777#comment-16913777
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Benjamin Mahler commented on MESOS-9806:
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commit de90b2b3078e06975ab2cccc061db821cfe7dda8
Author: Benjamin Mahler <bmah...@apache.org>
Date: Thu Aug 22 17:41:28 2019 -0400
Optimized Resources::shrink.
Master:
*HierarchicalAllocator_WithQuotaParam.LargeAndSmallQuota/2
Made 3500 allocations in 30.37 secs
Made 0 allocation in 27.05 secs
Master + this patch:
*HierarchicalAllocator_WithQuotaParam.LargeAndSmallQuota/2
Made 3500 allocations in 24.15 secs
Made 0 allocation in 20.48 secs
Review: https://reviews.apache.org/r/71353
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commit 05e5ca4b3446e34447f632463efe9a34b4bace7f
Author: Benjamin Mahler <bmah...@apache.org>
Date: Thu Aug 22 17:42:57 2019 -0400
Added ResourceQuantities::fromScalarResource.
Master + previous patches:
*HierarchicalAllocator_WithQuotaParam.LargeAndSmallQuota/2
Made 3500 allocations in 24.15 secs
Made 0 allocation in 20.48 secs
Master + previous patches + this patch:
Master + this patch:
*HierarchicalAllocator_WithQuotaParam.LargeAndSmallQuota/2
Made 3500 allocations in 23.37 secs
Made 0 allocation in 19.72 secs
Review: https://reviews.apache.org/r/71354
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> Address allocator performance regression due to the removal of quota role
> sorter.
> ---------------------------------------------------------------------------------
>
> Key: MESOS-9806
> URL: https://issues.apache.org/jira/browse/MESOS-9806
> Project: Mesos
> Issue Type: Improvement
> Components: allocation
> Reporter: Meng Zhu
> Assignee: Meng Zhu
> Priority: Critical
> Labels: resource-management
>
> In MESOS-9802, we removed the quota role sorter which is tech debt.
> However, this slows down the allocator. The problem is that in the first
> stage, even though a cluster might have no active roles with non-default
> quota, the allocator will now have to sort and go through each and every role
> in the cluster. Benchmark result shows that for 1k roles with 2k frameworks,
> the allocator could experience ~50% performance degradation.
> There are a couple of ways to address this issue. For example, we could make
> the sorter aware of quota. And add a method, say `sortQuotaRoles`, to return
> all the roles with non-default quota. Alternatively, an even better approach
> would be to deprecate the sorter concept and just have two standalone
> functions e.g. sortRoles() and sortQuotaRoles() that takes in the role tree
> structure (not yet exist in the allocator) and return the sorted roles.
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