the main reason is scalability and performance. If your Solr indexes fit fine on a single system and doesn't need to scale out, Cassandra/HDFS isn't necessary.
On Mon, Sep 30, 2013 at 11:50 AM, Ertio Lew <ertio...@gmail.com> wrote: > Solr's data is stored on the file system as a set of index files[ > http://stackoverflow.com/a/7685579/530153]. Then why do we need anything > like Solandra or DataStax Enterprise Search? Isn't Solr complete solution > in itself ? What do we need to integrate with Cassandra ? > > > >