Re: Adding more nodes causes performance problem

2015-02-09 Thread Dominic Letz
Can you copy and example of your read and write queries? Are they both degrading in the same way performance wise? On Mon, Feb 9, 2015 at 8:39 PM, Laing, Michael wrote: > Use token-awareness so you don't have as much coordinator overhead. > > ml > > On Mon, Feb 9, 2015 at 5:32 AM, Marcelo Valle

Re: Adding more nodes causes performance problem

2015-02-09 Thread Laing, Michael
Use token-awareness so you don't have as much coordinator overhead. ml On Mon, Feb 9, 2015 at 5:32 AM, Marcelo Valle (BLOOMBERG/ LONDON) < mvallemil...@bloomberg.net> wrote: > AFAIK, if you were using RF 3 in a 3 node cluster, so all your nodes had > all your data. > When the number of nodes sta

Adding more nodes causes performance problem

2015-02-08 Thread C . B .
I have a cluster with 3 nodes, the only keyspace is with replication factor of 3, the application read/write UUID-keyed data. I use CQL (casssandra-python), most writes are done by execute_async, most read are done with consistency level of ONE, overall performance in this setup is better than I e