what is the difference between Cassndra and Mongo DB? I have to choose one of them on top of hadoop. I have simple requirement to store data with size of peta byte.
Is there any one who have experience in both of them? can anyone help me to select right one?
It is for Big Data Database discussion like Cassandra, MongoDB, CouchDB, Redis, Riak, HBase, Couchbase, Neo4j, Hypertable, ElasticSearch, Accumulo, VoltDB, Scalaris etc.
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