Showing posts with label hive. Show all posts
Showing posts with label hive. Show all posts
Friday, June 5, 2015
Monday, June 1, 2015
Wednesday, May 13, 2015
Friday, May 8, 2015
Monday, April 20, 2015
Thursday, March 19, 2015
Wednesday, February 25, 2015
Tuesday, January 27, 2015
Thursday, January 15, 2015
Tuesday, January 6, 2015
Friday, December 12, 2014
Tuesday, December 9, 2014
Tuesday, December 2, 2014
Thursday, November 27, 2014
Wednesday, November 19, 2014
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Many commands can check the memory utilization of JAVA processes, for example, pmap, ps, jmap, jstat. What are the differences? Before we ...
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Hive table contains files in HDFS, if one table or one partition has too many small files, the HiveQL performance may be impacted. Sometime...
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This article shows a sample code to load data into Hbase or MapRDB(M7) using Scala on Spark. I will introduce 2 ways, one is normal load us...
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Hive is trying to embrace CBO(cost based optimizer) in latest versions, and Join is one major part of it. Understanding join best practices ...
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This is a cookbook for scala programming. 1. Define a object with main function -- Helloworld. object HelloWorld { def main(args: Array...
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Goal: This article explains the configuration parameters for Oozie Launcher job.
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Goal: How to control the number of Mappers and Reducers in Hive on Tez.
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Goal: This article research on how Spark calculates the Decimal precision and scale using GPU or CPU mode. Basically we will test Addition/S...
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Env: PostgreSQL or Greenplum Symptom: COPY from a file into a table fails with error: ERROR: invalid byte sequence for encoding "...