cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <>
Subject Re: Hadoop over Cassandra
Date Wed, 19 May 2010 06:31:02 GMT
On Tue, May 18, 2010 at 9:40 PM, Mark Schnitzius
<> wrote:
>> If anyone has "war stories" on the topic of Cassandra & Hadoop (or
>> even just Hadoop in general) let me know.
> Don't know if it counts as a war story, but I was successful recently in
> implementing something I got advice on in an earlier thread, namely feeding
> both a Cassandra table and a Hadoop sequence file into the same map/reduce
> process and updating the same Cassandra table with the results.  I used the
> approach I mentioned before, of creating an InputFormat that returns splits
> from both (and creating a RecordReader that massages the Cass data into the
> same format as the sequence file data).  I'll write something up about it
> for the wiki, when I can find some time.

That would be very interesting, I hope you can get around to it!

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

View raw message