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From Chris Goffinet <goffi...@digg.com>
Subject Re: MVCC
Date Mon, 03 Aug 2009 15:53:21 GMT
How was it used in the original?

On Aug 3, 2009, at 8:49 AM, Jun Rao wrote:

> Ivan,
>
> The original cassandra keeps multiple versions of the column data.  
> However, that support has been removed in the apache code. Right  
> now, only the latest version is kept. In the future, we could add  
> the versioning support back.
>
> Jun
> IBM Almaden Research Center
> K55/B1, 650 Harry Road, San Jose, CA 95120-6099
>
> junrao@almaden.ibm.com
>
>
> <graycol.gif>Ivan Chang ---08/03/2009 08:24:50 AM---Does Cassandra  
> support MVCC? I am building an application with concurrent updates  
> (add, update, dele
>
> <ecblank.gif>
> From:	<ecblank.gif>
> Ivan Chang <ivan.chang@medigy.com>
> <ecblank.gif>
> To:	<ecblank.gif>
> cassandra-user@incubator.apache.org
> <ecblank.gif>
> Date:	<ecblank.gif>
> 08/03/2009 08:24 AM
> <ecblank.gif>
> Subject:	<ecblank.gif>
> MVCC
>
>
>
> Does Cassandra support MVCC?
>
> I am building an application with concurrent updates (add, update,  
> delete) and one of the requirements is to be able to run audits that  
> reproduce all the update histories and the data objects in different  
> versions.  What's the best way to go about this in Cassandra?  As  
> long as histories and versions are maintained?  Does Cassandra  
> support MVCC?
>
> -Ivan
>


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