Cassandra is about scaling writes not reads. MySQL is slow on writes because you'll get a random write for every index you maintain (+the table it's self). MyS

Cassandra is about scaling writes not reads. MySQL is slow on writes because you'll get a random write for every index you maintain (+the table it's self). MySQL's replication will help scale reads but does nothing for writes. Cassandra is actually said to be slower on reads and it's thought people will already be using memcache so it's not a problem. The article doesn't seem to have any writes going on while he is reading.