Important Variables for Scaling

2011-06-16 Thread Schuilenga, Jan Taeke
Which variables (for instance: throughput, CPU, I/O, connections) are leading in deciding to add a node to a Cassandra setup which is put under strain. We are trying to proove scalibility, but when is the time there to add a node and have the optimum scalibilty result.

Cassandra scaling problem in virtualized environment

2011-06-14 Thread Schuilenga, Jan Taeke
Hi All, We are having issues testing Cassandra in a virtualized environment (Vmware ESX). Our challenge is to combine a high number of concurrent users with a very low maximum response time. Immediately we ran into a problem with scalability where our performance (Trx per sec) unexpectedly