The In-Memory platform enables Cascalog to query data without the need for Hadoop. Instead, the data is manipulated entirely in-memory using just Clojure.
First, Cascalog converts the generators into tuples (which are just a sequence of maps). Cascalog then maps, filters, and aggregates the tuples. Finally, it uses sinks to output the resulting tuples.
The In-Memory platform enables Cascalog to query data without the need for Hadoop. Instead, the data is manipulated entirely in-memory using just Clojure. First, Cascalog converts the generators into tuples (which are just a sequence of maps). Cascalog then maps, filters, and aggregates the tuples. Finally, it uses sinks to output the resulting tuples.
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Tuples encapsulate the data that Cascalog queries. An individual tuple contains a field name and a value. It is represented as a map. So tuples are just a sequence of maps, and an example is: [{'?num' 1} {'?num' 2}].
Tuples encapsulate the data that Cascalog queries. An individual tuple contains a field name and a value. It is represented as a map. So tuples are just a sequence of maps, and an example is: [{'?num' 1} {'?num' 2}].
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