Showing posts with label drill. Show all posts
Showing posts with label drill. Show all posts
Monday, November 2, 2015
Tuesday, October 27, 2015
Friday, September 11, 2015
Tuesday, August 25, 2015
Wednesday, August 12, 2015
Tuesday, July 21, 2015
Thursday, July 16, 2015
Thursday, May 21, 2015
Tuesday, May 19, 2015
Sunday, May 17, 2015
Saturday, May 16, 2015
Thursday, May 14, 2015
Thursday, May 7, 2015
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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 "...