In ngrinder version 3.1, we let ngrinder controller to support cluster, then we can extend our load test center in linear.
Below is the architecture in previous version:
a) We use an embedded svn server to manager our script file. And the svn repositories are saved in file system in ngrinder home directory.
b) We use ehcache to improve the performance of getting data from DB and SVN repositories.
c) To extend the test running function and security, we use atlassian plugin system to provide the extensibility.
After the 3.1 version, the system architect is as below:
a) All the controllers in the cluster will use the same DB and file system. For the ngrinder home directory, we can set it a directory on a NAS address.
b) We utilize RMI replicated cache of ehcache, to make some data to be visiable in all controllers in cluster.