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From Josh Wills <>
Subject Re: Adding the ability to choose my own number of reducers for Sharded Join
Date Thu, 10 Mar 2016 18:33:00 GMT
Hey Joel,

I'm sorry I missed this before; we rarely get pull requests for historical
reasons (i.e., we're all really old.) Patch looks good, I'll do the merge


On Thu, Mar 10, 2016 at 9:30 AM, Joel Östlund <>

> Hey,
> I would like to add the ability to choose the amount of reducers that can
> be used with the ShardedJoinStrategy. Currently, only the default number is
> chosen (500), this causes a lot of problems in my pipelines and will be a
> much slower alternative than using the DefaultJoinStrategy (for cases where
> I need around 5000 reducers). Due to the large data amount that needs to go
> through 500 reducers. I Have already opened a pull request a while ago, but
> I am willing to follow your structure and opening a JIRA ticket and then
> submit it according to the official process, if you guys think it is a good
> idea. I think this would increase the performance in crunch when using
> large data sets.
> Basically this is what I want  to add:
> ---
> Thanks!
> Joel Östlund

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