impala


Creating UDF and UDAF for Impala

 Installing the UDF Development Package

The output will be like below code. [cloudera@quickstart impala-udf-samples-master]$ cmake . — The C compiler identification is GNU 4.4.7 — The CXX compiler identification is GNU 4.4.7 — Check for working C compiler: /usr/bin/cc — Check for working C compiler: /usr/bin/cc — works — Detecting C compiler ABI info — Detecting C compiler ABI info – done — Check for working CXX compiler: /usr/bin/c++ […]


Impala Best Practices

Below are Impala performance tuning options: Pre-execution Checklist    Data types    Partitioning    File Format Data Type Choices      Define integer columns as INT/BIGINT      Operations on INT/BIGINT more efficient than STRING      Convert “external” data to good “internal” types on load      e.g. CAST date strings to TIMESTAMPS      This avoids expensive CASTs in queries later Partitioning The fastest I/O is the one […]


Review Comments
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I am a plsql developer. Intrested to move into bigdata.

Neetika Singh ITA Hadoop in Dec/2016 December 22, 2016

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