Monday, April 20, 2015
Friday, April 17, 2015
Thursday, April 16, 2015
Thursday, April 2, 2015
Thursday, March 26, 2015
Tuesday, March 24, 2015
Thursday, March 19, 2015
Thursday, March 12, 2015
Wednesday, February 25, 2015
Subscribe to:
Posts (Atom)
Popular Posts
-
Many commands can check the memory utilization of JAVA processes, for example, pmap, ps, jmap, jstat. What are the differences? Before we ...
-
Hive table contains files in HDFS, if one table or one partition has too many small files, the HiveQL performance may be impacted. Sometime...
-
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...
-
Hive is trying to embrace CBO(cost based optimizer) in latest versions, and Join is one major part of it. Understanding join best practices ...
-
This is a cookbook for scala programming. 1. Define a object with main function -- Helloworld. object HelloWorld { def main(args: Array...
-
Goal: How to build and use parquet-tools to read parquet files. Solution: 1. Download and Install maven. Follow below link: http://...
-
Goal: This article explains the configuration parameters for Oozie Launcher job.
-
Goal: How to control the number of Mappers and Reducers in Hive on Tez.
-
Goal: This article research on how Spark calculates the Decimal precision and scale using GPU or CPU mode. Basically we will test Addition/S...
-
Env: PostgreSQL or Greenplum Symptom: COPY from a file into a table fails with error: ERROR: invalid byte sequence for encoding ...