Re: Optimize encoding/decoding strings when using Parquet

I have put in a PR on Parquet to support dictionaries when filters are pushed down, which should reduce binary conversion overhear when Spark pushes down string predicates on columns that are dictionary encoded. https://github.com/apache/incubator-parquet-mr/pull/117 It's blocked at the moment

Re: Caching tables at column level

Thanks - we have tried this and it works nicely. -- View this message in context: http://apache-spark-developers-list.1001551.n3.nabble.com/Caching-tables-at-column-level-tp10377p10618.html Sent from the Apache Spark Developers List mailing list archive at Nabble.com.

Re: Why a program would receive null from send message of mapReduceTriplets

I have a question: *How could the attributes of triplets of a graph get update after mapVertices() func? * My code ``` // Initial the graph, assign a counter to each vertex that contains the vertex id only var anfGraph = graph.mapVertices { case (vid, _) = val counter = new HyperLogLog(5)

FW: Trouble posting to the list

FYI ++ Chris Mattmann, Ph.D. Chief Architect Instrument Software and Science Data Systems Section (398) NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA Office: 168-519, Mailstop: 168-527 Email: chris.a.mattm...@nasa.gov WWW: