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Type: New Feature
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Resolution: Duplicate
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Priority: Minor - P4
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None
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Affects Version/s: None
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Component/s: Tools
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None
MapReduce would be more useful if it supports many collections as data source instead of just one. This feature would turn MongoDB into a full replacement for Hadoop in sharded environments, and will add capabilities to process largest amount of data.
I think it would be even more useful if MapReduce can process collections from different databases as well, because the number of collections in a databases is limited by default.
- duplicates
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SERVER-19095 $lookup
- Closed