Elastic Search Index Large Json File Example
1. Overview Elastic Search support bulk index, delete, update operation using Bulk API. In this article, we will discuss how to index a large JSON file using GSON and Elastic Search…
Java Parse Large Json File GSON Example
1. Overview In this article, we will discuss parse/load JSON file using GSON streaming API. GSON Streaming api provide facility to read and write large json objects using JsonReader and…
Java Parse Large Json File Jackson Example
1. Overview In this article, we will discuss parse/ load large JSON files using Jackson streaming APIs. Jackson provides facility to improve application performance by using it’s streaming API which…
Hadoop MultipleOutputs With Different Compression Format
1. Overview Sometimes we require that our Hadoop job write data to multiple output locations with a different compression method. Hadoop provides facility to write the output of a job at a…
Java Read & Write files in HDFS Example
1. Overview In this article, we will discuss I/O operation with HDFS from a java program. Hadoop provides mainly two classes FSDataInputStream for reading a file from HDFS and FSDataOutputStream…
Hadoop Custom Output Format Example
1. Overview Hadoop provides various Output classes like DBOutputFormat, SequenceFileOutputFormat, TextOutputFormat, etc..It also provides flexibility to its developers to use APIs and extend some of the functionality to achieve organization goals….
Hadoop Create Custom Key Writable Example
1. Overview Hadoop provides various writable classes like IntWritable, Text, LongWritable, ObjectWritable etc..It also provides flexibility to its developers to use APIs and extend some of the functionality to achieve organization goals….
Hadoop Create Custom Value Writable Example
1. Overview Hadoop provides various writable classes like IntWritable, Text, LongWritable, ObjectWritable etc..It also provides flexibility to its developers to use APIs and extend some of the functionality to achieve organization goals….
Debug Hadoop Map Reduce Code
1. Overview “Hadoop is a framework which allows us to distributed processing of large data sets across clusters of computers.” As we know Hadoop job submitted to cluster for further execution…
Hadoop Multiple Outputs Example
1. Overview Sometimes we require that our Hadoop job write data to multiple output locations. Hadoop provides facility to write the output of a job at a different location based on our…