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From Ran Tavory <ran...@gmail.com>
Subject Re: mapreduce from cassandra to cassandra
Date Tue, 18 May 2010 09:22:31 GMT
hbase - yes. But is that reusable for cassandra?

On Tue, May 18, 2010 at 12:17 PM, Jeff Zhang <zjffdu@gmail.com> wrote:

> I believe it is possible to write result back to cassandra. If I
> remember correctly, HBase has both InputFormat and OutputFormat for
> hadoop.
>
>
>
>
> On Tue, May 18, 2010 at 5:08 PM, Ran Tavory <rantav@gmail.com> wrote:
> > In the wordcount example the process reads from cassandra and the result
> is
> > written to a local file at /tmp/word_count*
> > Is it possible to read from cassandra and write the result back to
> cassandra
> > to a specified cf/row/column?
> > I see that there exists a ColumnFamilyInputFormat but not
> > ColumnFamilyOutputFormat or something like that
> > (in
> http://svn.apache.org/repos/asf/cassandra/trunk/src/java/org/apache/cassandra/hadoop/
> )
> > My knowledge about hadoop and mr is pretty basic so maybe I'm missing
> > something simple, lmk, thanks!
>
>
>
> --
> Best Regards
>
> Jeff Zhang
>

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