Re: reduced num_token = improved performance ??

2017-07-12 Thread Chris Lohfink
Probably worth mentioning that some operational procedures like repairs, bootstrapping etc are helped massively by using less tokens. Incremental repairs are one of the things I would say is most impacted the by it since less tokens will mean less local ranges to iterate through and less anti compa

Re: reduced num_token = improved performance ??

2017-07-11 Thread Justin Cameron
Hi, Using fewer vnodes means you'll have a higher chance of hot spots in your cluster. Hot spots in Cassandra are nodes that, by random chance, are responsible for a higher percentage of the token space than others. This means they will receive more data and also more traffic/load than other nodes

reduced num_token = improved performance ??

2017-07-11 Thread ZAIDI, ASAD A
Hi Folks, Pardon me if I’m missing something obvious. I’m still using apache-cassandra 2.2 and planning for upgrade to 3.x. I came across this jira [https://issues.apache.org/jira/browse/CASSANDRA-7032] that suggests reducing num_token may improve general performance of Cassandra like having