August 2015
Intermediate to advanced
672 pages
23h 1m
English
book
Expert Oracle Exadata, Second Edition
by Martin Bach, Karl Arao, Andy Colvin, Frits Hoogland, Randy Johnson, Kerry Osborne, Tanel Poder
Content preview from Expert Oracle Exadata, Second Edition
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CHAPTER 3
Hybrid Columnar Compression
Hybrid Columnar Compression, or (E)HCC for short, was, and probably still is, one of the most misunderstood features in Exadata. This has not really changed since the first edition of this book, which is why we place such an emphasis on it. HCC started out as an Exadata-only feature, but its use is now available to a more general audience. Anyone who wants to use HCC at the time of this writing will have to either use Exadata or the Oracle ZFS Storage Appliance. The Pillar Axiom series of storage arrays also support working with HCC compressed data natively, without having to decompress it first. Oracle’s ...
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