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From Arpit Agarwal <aagar...@hortonworks.com>
Subject Re: Next releases
Date Tue, 07 Jan 2014 00:47:32 GMT
This merge to branch-2 is complete. The changes have been merged to
branch-2 and target version set to 2.4.0 (r1556076).


On Fri, Jan 3, 2014 at 4:13 PM, Arpit Agarwal <aagarwal@hortonworks.com>wrote:

> We plan to merge HDFS-2832 to branch-2 next week for inclusion in 2.4.
>
>
>
> On Fri, Dec 6, 2013 at 1:53 PM, Arun C Murthy <acm@hortonworks.com> wrote:
>
>> Thanks Suresh & Colin.
>>
>> Please update the Roadmap wiki with your proposals.
>>
>> As always, we will try our best to get these in - but we can collectively
>> decide to slip some of these to subsequent releases based on timelines.
>>
>> Arun
>>
>> On Dec 6, 2013, at 10:43 AM, Suresh Srinivas <suresh@hortonworks.com>
>> wrote:
>>
>> > Arun,
>> >
>> > I propose the following changes for 2.3:
>> > - There have been a lot of improvements related to supporting http
>> policy.
>> > - There is a still discussion going on, but I would like to deprecate
>> > BackupNode in 2.3 as well.
>> > - We are currently working on rolling upgrades related change in HDFS.
>> We
>> > might add a couple of changes that enables rolling upgrades from 2.3
>> > onwards (hopefully we can this done by December)
>> >
>> > I propose the following for 2.4 release, if they are tested and stable:
>> > - Heterogeneous storage support - HDFS-2832
>> > - Datanode cache related change - HDFS-4949
>> > - HDFS ACLs - HDFS-4685
>> > - Rolling upgrade changes
>> >
>> > Let me know if you want me to update the wiki.
>> >
>> > Regards,
>> > Suresh
>> >
>>
>> On Dec 6, 2013, at 12:27 PM, Colin McCabe <cmccabe@alumni.cmu.edu> wrote:
>>
>> > If 2.4 is released in January, I think it's very unlikely to include
>> > symlinks.  There is still a lot of work to be done before they're
>> > usable.  You can look at the progress on HADOOP-10019.  For some of
>> > the subtasks, it will require some community discussion before any
>> > code can be written.
>> >
>> > For better or worse, symlinks have not been requested by users as
>> > often as features like NFS export, HDFS caching, ACLs, etc, so effort
>> > has been focused on those instead.
>> >
>> > For now, I think we should put the symlinks-disabling patches
>> > (HADOOP-10020, etc) into branch-2, so that they will be part of the
>> > next releases without additional effort.
>> >
>> > I would like to see HDFS caching make it into 2.4.  The APIs and
>> > implementation are beginning to stabilize, and around January it
>> > should be ok to backport to a stable branch.
>> >
>> > best,
>> > Colin
>> >
>> >
>> > On Thu, Nov 7, 2013 at 6:42 PM, Arun C Murthy <acm@hortonworks.com>
>> wrote:
>> >
>> >> Gang,
>> >>
>> >> 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?
>> >>
>> >> HDFS???
>> >>
>> >> Overall, I feel like we have a decent chance of rolling hadoop-2.3 by
>> the
>> >> end of the year.
>> >>
>> >> Thoughts?
>> >>
>> >> thanks,
>> >> Arun
>> >>
>> >>
>> >> --
>> >> Arun C. Murthy
>> >> Hortonworks Inc.
>> >> http://hortonworks.com/
>> >>
>> >>
>> >>
>> >> --
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>> >
>> >
>> >
>> > --
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>> --
>> Arun C. Murthy
>> Hortonworks Inc.
>> http://hortonworks.com/
>>
>>
>>
>> --
>> CONFIDENTIALITY NOTICE
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>>
>
>

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