reuse is not possible, but I think it won't hard for cassandra to implement a ColumnFamilyOutputFormat. In my opinion, the ColumnFamilyOutputFormat should be easier to implement than ColumnFamilyInputFormat, because you don't need to think about split in the implementation of OutputFormat.
On Tue, May 18, 2010 at 5:22 PM, Ran Tavory <ran...@gmail.com> wrote: > hbase - yes. But is that reusable for cassandra? > > On Tue, May 18, 2010 at 12:17 PM, Jeff Zhang <zjf...@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 <ran...@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 > > -- Best Regards Jeff Zhang
