Below is a summary of the Java 7 results.

Summary

Cluster size Call Rate Event Rate SIP message Rate Results

One node

2100

12,600 events/s

27,300 messages/s

Two nodes

4199

25,194 events/s

54,587 messages/s

Three nodes

6298

37,788 events/s

81,874 messages/s

Four nodes

8397

50,382 events/s

109,161 messages/s

Types of graphs

The individual test results include four types of graphs:

Throughput

Total throughput (calls per second) of a cluster over the course of the test run. The "ramp-up" period at the start of each run is required because the load generators are Java programs, which need time for the JVM to perform its compilation and optimisation of Java code. (If we did not use a ramp-up period, the load generators would be overloaded initially, which would skew the results.)

Response Times

Distribution of response-time changes during the course of the test run.

Response Time Distribution

Overall distribution of response times from the entire test run.

CPU Utilization

Percentage of CPU used on Rhino servers, as measured by vmstat.

Heap

Heap usage.

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