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Hybrid Columnar Compression

  • Martin Bach
  • Karl Arao
  • Andy Colvin
  • Frits Hoogland
  • Kerry Osborne
  • Randy Johnson
  • Tanel Poder

Abstract

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 most recent storage offering, the FS1 array, also features HCC on its data sheet. Offloading scans of HCC data remains the domain of the Exadata storage cells though.

Keywords

Compression Ratio Compression Algorithm Compression Level Compression Type Basic Compression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Martin Bach, Karl Arao, Andy Colvin, Frits Hoogland, Randy Johnson, Kerry Osborne, and Tanel Poder 2015

Authors and Affiliations

  • Martin Bach
    • 1
  • Karl Arao
    • 1
  • Andy Colvin
    • 1
  • Frits Hoogland
    • 1
  • Kerry Osborne
    • 1
  • Randy Johnson
    • 1
  • Tanel Poder
    • 1
  1. 1.TXUS

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