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From Philip Lee <>
Subject ORC format
Date Mon, 01 Feb 2016 15:21:00 GMT

I experiment the performance of some systems between ORC and CSV file.
I read about ORC documentation on Hive website, but still curious of some

I know ORC format is faster on filtering or reading because it has indexing.
Has it advantage of joining two tables of ORC dataset as well?

Could you explain about it in detail?
When experimenting, it seems like it has some advantages of joining in some
aspect, but not quite sure what characteristic of ORC make this happening
rather than CSV.


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