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From Suresh Srinivas <sures...@yahoo-inc.com>
Subject Re: [DISCUSS] Move project split down a level
Date Fri, 14 Jan 2011 20:00:58 GMT
I like the idea of merging projects together. It save a lot of time.

However, I would like to see a detailed proposal on how this will be done and discussions
on it, before moving forward on this. If this work is done, need clear messages to the developers
on what has changed, and how development process is affected. These details were missing when
project split was done, causing great deal of confusion and pain.

We should also address the following:
# Is project split a goal for hadoop in the future (even though we are not ready yet?). If
it is, then putting projects back together might result in tight dependencies between the
project. Ho do we avoid it?
# The committer list for each of the sub project today is different. How do we reconcile them?

On 1/14/11 11:53 AM, "Tsz Wo (Nicholas), Sze" <s29752-hadoopgeneral@yahoo.com> wrote:

This is a kind of an incompatible change: all the developers, QAs, release
engineers and users have to change their local settings and scripts for this
change.  Moreover, there are documentations, web pages and existing tools using
the Apache svn URLs.  So it is a huge impact.  I am conservative on this since,
as Konstantin mentioned, we risk to get into the same mess, and it will create
more work for the community.

Why do we want to enforce the releases as a unit, given that the long term
target is to release these 3 projects independently?


From: Nigel Daley <ndaley@mac.com>
To: general@hadoop.apache.org
Sent: Fri, January 14, 2011 11:21:25 AM
Subject: Re: [DISCUSS] Move project split down a level

On Jan 14, 2011, at 11:16 AM, Tsz Wo (Nicholas), Sze wrote:

> Hi Nigel,
>> As I look more at the impact of the common/MR/HDFS project split on what
>> and how we release Hadoop, I feel like the split needs an adjustment.  Many
>> folks I've talked to agree that the project split has caused us a splitting
>> headache.  I think 1 relatively small change could alleviate some of that.
> Could you elaborate your idea on how the proposed changes would help?  What the
> problems are being addressed?  It is not clear to me.

Critical in my mind was my statement: "We're a long way from releasing these 3
projects independently.  Given that, they should be branched and released as a
unit."  This can not be enforced given the current svn layout. Other's can weigh
in with additional thoughts.

> You are right that the change is small but the impact is huge.  We should first
> understand what we are getting from the changes before doing it.

What do you see as the huge impact?


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