Columnar

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Writers

Algo lite

·May 9, 2021

Print collection in columnar fashion

Given a collection, which is a collection of multi-length collections, print the collection column-wise. Multi-length collections! Yes, you read it right. The collection can have different length elements. That means the first collection can have three elements, the second can have one element, and the third can have two elements. …

Algorith

2 min read

Eric Sun

Analytics Vidhya

·Mar 16, 2020

Are We Taking Only Half Of The Advantage Of Columnar File Format?

(* originally posted in LinkedIn in 2018 ) Columnar file formats have become the primary storage choice for big data systems, but when I Googled related topics this weekend, I just found that most articles were talking about the simple query benchmark and storage footprint comparisons between a particular columnar…

Columnar

8 min read

Landon Robinson

Hadoopsters

·Sep 1, 2017

How to Write ORC Files and Hive Partitions in Spark

ORC, or Optimized Row Columnar, is a popular big data file storage format. Its rise in popularity is due to it being highly performant, very compressible, and progressively more supported by top-level Apache products, like Hive, Crunch, Cascading, Spark, and more. I recently wanted / needed to write ORC files…

Spark

2 min read

Emil Kirschner

·Mar 1, 2017

A Java Time Series Columnar Store

In my previous post, “A case for in-memory columnar data structures”, I used a JMH benchmark to show that if what we need to do is calculate statistical indicators over an object field ( metric ), destructuring data and store successive values of that metric in a continuous array is…

Java

8 min read

Columnar

Print collection in columnar fashion

Are We Taking Only Half Of The Advantage Of Columnar File Format?

How to Write ORC Files and Hive Partitions in Spark

A Java Time Series Columnar Store

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