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From Nigel Daley <nda...@mac.com>
Subject Re: [DISCUSS] Hadoop Security Release off Yahoo! patchset
Date Fri, 14 Jan 2011 06:07:13 GMT
I say just do it.  Eli said it wasn't a blocker. Sure it ain't perfect, but it's good enough.

Let's move on to 0.22 and beyond.


On Jan 13, 2011, at 8:23 PM, Arun C Murthy wrote:

> On Jan 13, 2011, at 6:50 PM, Eli Collins wrote:
>> The cdh3 patch set Todd is talking about is not vanilla 104.3, it's
>> 104.3 re-based onto 20.2 plus patches from branch-20 and trunk (the
>> performance and stability fixes I think you're referring to, at least
>> the ones that have been posted to Apache jira).
>> Can you post a pointer to the version you're referring to, eg on
>> github?  If there isn't a big delta between it and the cdh3 patch set
>> (which should have the 20-based patches from jira) perhaps you and
>> Todd could easily merge in the delta to create 0.20.x?
> I can guarantee it will need work to merge the enhancements since 20.104.3, it's over
6 months of development. The enhancements includes work on stability such as iterative ls,
limits on JT to prevent single jobs/users from taking it down etc. and lots of bug-fixes to
security. So, unfortunately the delta is pretty large.
> I'm working on a CHANGES.txt which should reflect all the changes i.e. bug-fixes and
>>> The version I'm offering to push to the community has fixed all of them,
>>> *plus* the added benefit of several stability and performance fixes we have
>>> done since 20.104.3, almost 10 internal releases. This is a battle tested
>>> and hardened version which we have deployed on 40,000+ nodes. It is a
>>> significant upgrade on which we never deployed. I'm pretty sure
>>> *some* users will find that valuable. ;)
>> Definitely, but better to hit two birds with one stone right?  Instead
>> of a security + enhancements release and an append release we could
>> have a single security + append + enhancements release and users don't
>> have to choose.
> We are discussing two options:
> 20 + security + enhancements
> 20 + security + append
> I think the value we provide via 20+security+enhancements release is that it's stable,
tested and deployed at scale. Doing any more work merging 6 months of work at Yahoo (again,
I guarantee it's a lot of work) will need a lots of cycles to validate, test and stabilize.
> I feel the alternative is a distraction for me, I'd rather work on 0.22.
> I can get 20+security+enhancements done very, very, quickly precisely because I don't
have to spend cycles testing it.
> Does that make sense? Thanks for being patient and bearing with me...
> Arun

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