Re: HCC in Pillar Storage
- From: Marcin Przepiorowski <pioro1@xxxxxxxxx>
- To: Ls Cheng <exriscer@xxxxxxxxx>
- Date: Tue, 20 Mar 2012 13:27:09 +0000
On Tue, Mar 20, 2012 at 12:55 PM, Ls Cheng <exriscer@xxxxxxxxx> 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.
regards,
--
Marcin Przepiorowski
http://oracleprof.blogspot.com
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