Showing posts with label HBase. Show all posts
Showing posts with label HBase. Show all posts
Saturday, December 12, 2020
Friday, December 11, 2020
Monday, October 30, 2017
Friday, October 27, 2017
Tuesday, February 10, 2015
Wednesday, January 28, 2015
Friday, December 12, 2014
Sunday, June 15, 2014
Thursday, May 22, 2014
Tuesday, May 20, 2014
Friday, May 16, 2014
Thursday, May 15, 2014
Tuesday, May 13, 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 ...