Short answer: yes, this is normal. Longer answer: this was discussed at length on this list a few days ago, check the archives.
On Wed, Jul 14, 2010 at 10:55 PM, Hendro Kaskus <hen...@kaskusnetworks.com> wrote: > Hi everyone, > > I'm newbie to Cassandra :D.. I try to insert data from MySQL to Cassandra. > Data dump from MySQL is about 11 MB (64716 records). But when i'm insert to > Cassandra, i think the data is become bigger than in MySQL. Is it true...??? > > Thanks -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
