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Migrating from SQL to MapReduce with MongoDB

• mdirolf 16y ago
  just a note for people who come across this and are confused: queries in MongoDB use a much more concise document-based query language, not map/reduce. map/reduce in MongoDB is just for aggregations / ETL type operations
• deleted 16y ago
  [deleted]
• mrinterweb 16y ago
  Too bad: "PHP has encountered an Access Violation at 7C81BD02"
  • vessenes 16y ago
    There are so many jokes one could make. Since it's HN, I won't.
    • astrodust 16y ago
      I like how you joke about joking, and that's enough to be funny.
• neurotech1 16y ago
  Google Cache: http://webcache.googleusercontent.com/search?q=cache:rickosborne.org/blog/index.php/2010/02/09/infographic-migrating-from-sql-to-mapreduce-with-mongodb/ http://webcache.googleusercontent.com/search?q=cache:rickosb...
• smanek 16y ago
  The actual content (since the webpage is broken): http://rickosborne.org/download/SQL-to-MongoDB.pdf http://rickosborne.org/download/SQL-to-MongoDB.pdf
• joubert 16y ago
  is there any chance MongoDB will introduce some form of transaction support?
• KERMIT 16y ago
  The MongoDB query looks just like the execution plan that'd be generated behind the scenes by the query evaluator of any relational database. Except, of course, the MongoDB query isn't optimized nearly as much as the query plan generated by the relational database would be.