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From Xuan Gong <xg...@hortonworks.com>
Subject Re: [VOTE] Merge feature branch YARN-5734 (API based scheduler configuration) to trunk, branch-3.0, branch-2
Date Mon, 09 Oct 2017 16:18:52 GMT
+1 (binding)

Xuan Gong

>On Mon, Oct 2, 2017 at 11:09 AM, Jonathan Hung <jyhung2357@gmail.com>
>> Hi all,
>> From discussion at [1], I'd like to start a vote to merge feature branch
>> YARN-5734 to trunk, branch-3.0, and branch-2. Vote will be 7 days,
>> Monday Oct 9 at 11:00AM PDT.
>> This branch adds a framework to the scheduler to allow scheduler
>> configuration mutation on the fly, including a REST and CLI interface,
>> an interface for the scheduler configuration backing store. Currently
>> capacity scheduler implements this framework.
>> Umbrella is here (YARN-5734
>> <https://issues.apache.org/jira/browse/YARN-5734>), jenkins build is
>> (
>> YARN-7241 <https://issues.apache.org/jira/browse/YARN-7241>). All
>> tasks for this feature are committed. Since this feature changes RM
>> we have tested this on a local RM setup with a suite of configuration
>> changes with no issue so far.
>> Key points:
>> - The feature is turned off by default, and must be explicitly
>> to turn on. When turned off, the behavior reverts back to the original
>> based mechanism for changing scheduler configuration (i.e. yarn rmadmin
>> -refreshQueues).
>> - The framework was designed in a way to be extendable to other
>> (most notably FairScheduler).
>> - A pluggable ACL policy (YARN-5949
>> <https://issues.apache.org/jira/browse/YARN-5949>) allows admins
>> fine-grained control for who can change what configurations.
>> - The configuration storage backend is also pluggable. Currently an
>> in-memory, leveldb, and zookeeper implementation are supported.
>> There were 15 subtasks completed for this feature.
>> Huge thanks to everyone who helped with reviews, commits, guidance, and
>> technical discussion/design, including Carlo Curino, Xuan Gong, Subru
>> Krishnan, Min Shen, Konstantin Shvachko, Carl Steinbach, Wangda Tan,
>> Kumar Vavilapalli, Suja Viswesan, Zhe Zhang, Ye Zhou.
>> [1]
>> http://mail-archives.apache.org/mod_mbox/hadoop-yarn-dev/201709.mbox/%
>> 3CCAHzWLgfEAgczjcEOUCg-03ma3ROtO=PKEc9dPGGYX9rZF3NvDw@mail.gmail.com%3E
>> Jonathan Hung

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