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Aggregation pipelines in MongoDb

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Avatar for Łukasz Mokrzycki Łukasz Mokrzycki
February 20, 2014
Programming
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Aggregation pipelines in MongoDb

Avatar for Łukasz Mokrzycki

Łukasz Mokrzycki

February 20, 2014

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Transcript

  1. Aggregation Pipelines in MongoDB Łukasz Mokrzycki

  2. Queries in MongoDB Single Purpose Aggregation Map / Reduce Aggregation

    Pipelines

  3. Single Purpose Aggregation COUNT DISTINCT GROUP (has a few limitations,

    but provide reduce operation)
  4. None
  5. None
  6. None
  7. None

  8. Optimization Filter fields before aggregation. Use indexes. Order matters.

  9. Limits Symbol, MinKey, MaxKey, DBRef, Code, CodeWScope types are restricted.

    Max output size is 16Mb. 10% of system memory.