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From Jun Ping Du <...@vmware.com>
Subject Re: Next releases
Date Fri, 08 Nov 2013 09:02:50 GMT
Hi Arun,
   Thanks for working out this list which looks great to me. In addition, I would like to
add an item: YARN-291 to 2.3 release which enhance YARN's resource elasticity in cloud scenario
and can benefit other scenarios i.e. graceful NM decommission (YARN-914), non job/app regression
(or maintenance model) in NM rolling upgrade (YARN-671), etc. With great help from Luke, Bikas
and Vinod, we already get the first and the most important work (YARN-311) in. Now, I am working
on the left parts include: interfaces (RPC, CLI, REST, etc.) and a few enhancements (persistent,
supporting different policies, etc.) and be optimistic on completing most of work by the end
of 2013. Would you help to embrace it in if we can make it on time? :)



----- Original Message -----
From: "Arun C Murthy" <acm@hortonworks.com>
To: common-dev@hadoop.apache.org, hdfs-dev@hadoop.apache.org, yarn-dev@hadoop.apache.org,
Sent: Friday, November 8, 2013 10:42:36 AM
Subject: Next releases


 Thinking through the next couple of releases here, appreciate f/b.

 # hadoop-2.2.1

 I was looking through commit logs and there is a *lot* of content here (81 commits as on
11/7). Some are features/improvements and some are fixes - it's really hard to distinguish
what is important and what isn't.

 I propose we start with a blank slate (i.e. blow away branch-2.2 and start fresh from a copy
of branch-2.2.0)  and then be very careful and meticulous about including only *blocker* fixes
in branch-2.2. So, most of the content here comes via the next minor release (i.e. hadoop-2.3)

 In future, we continue to be *very* parsimonious about what gets into a patch release (major.minor.patch)
- in general, these should be only *blocker* fixes or key operational issues.

 # hadoop-2.3
 I'd like to propose the following features for YARN/MR to make it into hadoop-2.3 and punt
the rest to hadoop-2.4 and beyond:
 * Application History Server - This is happening in  a branch and is close; with it we can
provide a reasonable experience for new frameworks being built on top of YARN.
 * Bug-fixes in RM Restart
 * Minimal support for long-running applications (e.g. security) via YARN-896
 * RM Fail-over via ZKFC
 * Anything else?


 Overall, I feel like we have a decent chance of rolling hadoop-2.3 by the end of the year.



Arun C. Murthy
Hortonworks Inc.

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