Re: HCC in Pillar Storage

From: Marcin Przepiorowski <>
Date: Tue, 20 Mar 2012 13:27:09 +0000
Message-ID: <>

On Tue, Mar 20, 2012 at 12:55 PM, Ls Cheng <> wrote:
> Hi
> Probably you are hitting Bug 13362079 - HCC compression should not be
> allowed on dNFS with non ZFS or Pillar?

Hmmm - yes this is bug ;)

> I am wondering because I am not very sure where is HCC done, if it is done
> in the DB how the hcc algorithm applies for some blocks (pillar) and some
> not (EVA), if it works shouldnt be a performance hit?

As far as I know HCC compression is done by DB but I have think / tested what is a performance hit.
Hope some Exadata experts will give you more details.


Marcin Przepiorowski
Received on Tue Mar 20 2012 - 08:27:09 CDT

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