-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/71269/
-----------------------------------------------------------
(Updated Aug. 15, 2019, 8:36 p.m.)
Review request for mesos, Andrei Sekretenko and Benjamin Mahler.
Changes
-------
Used map to manage the lifecycle of the role tree node.
Bugs: MESOS-9917
https://issues.apache.org/jira/browse/MESOS-9917
Repository: mesos
Description
-------
The role concept in Mesos fits into a tree structure naturally.
However, the role state in the allocator are currenstored
in a hashmap. This is less efficient and harder to use and reason.
This patch introduced a `RoleTree` structure in the allocator
and organizes all the roles in to a tree. This should simplify
the code logic and opens further refactor and optimization
opportunities.
In addition, the master code also lacks a proper tree structure
for tracking roles. We should leverage the same role tree code
here to simplify that as well.
Diffs (updated)
-----
src/master/allocator/mesos/hierarchical.hpp
8be8dcee04e8fc5b97f730b2f058d14c81678788
src/master/allocator/mesos/hierarchical.cpp
580d35a3b71c1f7e851fa0504c6b9f037c05c378
Diff: https://reviews.apache.org/r/71269/diff/4/
Changes: https://reviews.apache.org/r/71269/diff/3-4/
Testing
-------
make check
Benchmaring using optimized build shows no noticable performance change.
Benchmark: `BENCHMARK_HierarchicalAllocator_WithQuotaParam.LargeAndSmallQuota`
## Before:
Added 30 agents in 1.252621ms
Added 30 frameworks in 7.747202ms
Benchmark setup: 30 agents, 30 roles, 30 frameworks, with drf sorter
Made 36 allocations in 12.791427ms
Added 300 agents in 9.765295ms
Added 300 frameworks in 273.978325ms
Benchmark setup: 300 agents, 300 roles, 300 frameworks, with drf sorter
Made 350 allocations in 424.603736ms
Added 3000 agents in 79.646516ms
Added 3000 frameworks in 19.17449514secs
Benchmark setup: 3000 agents, 3000 roles, 3000 frameworks, with drf sorter
Made 3500 allocations in 31.687207066secs
## After:
Added 30 agents in 1.376619ms
Added 30 frameworks in 7.647487ms
Benchmark setup: 30 agents, 30 roles, 30 frameworks, with drf sorter
Made 36 allocations in 11.638116ms
Added 300 agents in 9.506101ms
Added 300 frameworks in 263.008198ms
Benchmark setup: 300 agents, 300 roles, 300 frameworks, with drf sorter
Made 350 allocations in 418.962396ms
Added 3000 agents in 81.553527ms
Added 3000 frameworks in 19.201708305secs
Benchmark setup: 3000 agents, 3000 roles, 3000 frameworks, with drf sorter
Made 3500 allocations in 31.583417136secs
Thanks,
Meng Zhu
