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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Cassandra Compression and Wide Rows
Date Tue, 19 Mar 2013 02:16:03 GMT
I feel this has come up before. I believe the compression is block based,
so just because no two column names are the same does not mean the
compression will not be effective. Possibly in their case the compression
was not effective.

On Mon, Mar 18, 2013 at 9:08 PM, Drew Kutcharian <drew@venarc.com> wrote:

> That's what I originally thought but the OOYALA presentation from C*2012
> got me confused. Do you guys know what's going on here?
>
> The video:
> http://www.youtube.com/watch?v=r2nGBUuvVmc&feature=player_detailpage#t=790s
> The slides: Slide 22 @
> http://www.datastax.com/wp-content/uploads/2012/08/C2012-Hastur-NoahGibbs.pdf
>
> -- Drew
>
>
> On Mar 18, 2013, at 6:14 AM, Edward Capriolo <edlinuxguru@gmail.com>
> wrote:
>
>
> Imho it is probably more efficient for wide. When you decompress 8k blocks
> to get at a 200 byte row you create overhead , particularly young gen.
> On Monday, March 18, 2013, Sylvain Lebresne <sylvain@datastax.com> wrote:
> > The way compression is implemented, it is oblivious to the CF being
> wide-row or narrow-row. There is nothing intrinsically less efficient in
> the compression for wide-rows.
> > --
> > Sylvain
> >
> > On Fri, Mar 15, 2013 at 11:53 PM, Drew Kutcharian <drew@venarc.com>
> wrote:
> >>
> >> Hey Guys,
> >>
> >> I remember reading somewhere that C* compression is not very effective
> when most of the CFs are in wide-row format and some folks turn the
> compression off and use disk level compression as a workaround. Considering
> that wide rows with composites are "first class citizens" in CQL3, is this
> still the case? Has there been any improvements on this?
> >>
> >> Thanks,
> >>
> >> Drew
> >
>
>
>

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