Cassandra N copies in N cluster?

I'm trying to configure Cassandra cluster on EC2.

The thing is that (for my purposes) I want to have N replicas in N machine cluster (all machine should have the same data).

I did the following:

- made a N machine cluster; all seeds;开发者_运维问答 I deployed schema with replication factor N

- populate the base with WRITE ALL consensus

- now I'm trying to access data with WRITE ANY, and READ ONE.

- I load balance my clients and theoretically I should have a N time better throughput, however that is not the case.

nodetool shows in Owns column sum of 100%, instead of N*100% (each node should have all data).

any suggestions?

If you increase replicas to N you will not see any throughput benefits, since Cassandra now has to write N copies. You will also not see any throughput benefits on reads, unless you disable read repair.

Best practice is to keep replica count constant as you increase N.