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 enhancements.
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 0.20.104.3 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
