ORC

• https://www.slideshare.net/Hadoop_Summit/orc-2015-faster-better-smaller-49481231
• https://cwiki.apache.org/confluence/display/Hive/LanguageManual+ORC
• https://www.ellicium.com/orc-file-structure/
• https://streever.atlassian.net/wiki/spaces/HADOOP/pages/4751362/
• https://www.linkedin.com/pulse/all-you-need-know-orc-file-structure-depth-rohan-karanjawala/
• https://streever.atlassian.net/wiki/spaces/HADOOP/pages/4751362/Optimizing+ORC+Files+for+Query+Performance
• http://www.zdnet.co.kr/news/news_view.asp?artice_id=20131211140045