Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@cassandra.apache.org
Received-SPF: pass (athena.apache.org: domain of colin.taylor@gmail.com
 designates 209.85.161.44 as permitted sender)
MIME-Version: 1.0
In-Reply-To: 
 <CAJHHpg2qhq3sytP5SKoYTvhkA+T+QT1in+1A6BMoVM1O3Jw3MA@mail.gmail.com>
References: 
 <CALdd-zjvWsd4r7fS8xL0D2JDzP9Vok2+w7u_4wCyPkfGMxKbPg@mail.gmail.com>
	<ffdd340a14bb48a0bde574d85f5d118d@HUB021-CA-3.exch021.domain.local>
	<CACE81Mjc3=H71S14efjFxODvhfmtJKrXzcYOmaFqM0it8fYqEg@mail.gmail.com>
	<CAJHHpg2qhq3sytP5SKoYTvhkA+T+QT1in+1A6BMoVM1O3Jw3MA@mail.gmail.com>
Date: Tue, 8 Nov 2011 17:11:34 +1300
Message-ID: 
 <CAN6ZwvvR5MrKZCSaTV_+t7QW6cZwj4ymW7uT3nMzKxUQ8QVFmw@mail.gmail.com>
Subject: Re: Second Cassandra users survey
From: Colin Taylor <colin.taylor@gmail.com>
To: user@cassandra.apache.org
Content-Type: text/plain; charset=ISO-8859-1

Decompression without compression (for lack of a better name).

We store into Cassandra log batches that come in over http either
uncompressed, deflate, snappy. We just add 'magic e.g. \0 \s \n \a \p
\p \y  as a prefix to the column value so we can decode it when serve
it back up.

Seems like Cassandra could detect data with the appropriate magic,
store as is and decode for us automatically on the way back.

Colin.