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From Aleksei Statkevich <astatkev...@rocketfuel.com>
Subject Why does ORC use Deflater instead of native ZlibCompressor?
Date Sat, 18 Jun 2016 05:31:35 GMT
Hello,

I recently looked at ORC encoding and noticed that hive.ql.io.orc.ZlibCodec
uses java's java.util.zip.Deflater and not Hadoop's native ZlibCompressor.

Can someone please tell me what is the reason for it?

Also, how does performance of Deflater (which also uses native
implementation) compare to Hadoop's native zlib implementation?

Thanks,
Aleksei

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