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From Ovidiu-Cristian MARCU <ovidiu-cristian.ma...@inria.fr>
Subject Hash tables - joins, cogroup, deltaIteration
Date Mon, 18 Apr 2016 19:47:54 GMT
Hi,

Can you please confirm if there is any update regarding the hash tables use cases, as in [1]
it is specified that Hash tables are used in Joins and for the Solution set in iterations
(pending work to use them for grouping/aggregations)?

I am interested in the pending work progress and also if you consider to add an implementation
where Joins and Solution Set in delta iterations (and CoGroup) can rely on a hybrid implementation
where the engine can use also disk if not enough memory available when working with these
hash tables.
 
[1] https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=53741525 <https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=53741525>
Memory Management (Batch API)

Thanks

Best,
Ovidiu
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