I tried to assist Hazelcast persons redirecting them to my colleagues in order to configure Redis properly, since I was in vacation, but they no longer replied and published this article where, the main point is that they don't know how to configure Redis properly. I think I'll stop forever to collaborate with Hazelcast about benchmarks and let them publish whatever they want: fortunately people chose systems according to other standards, that is, real world testing of properly configured setups and past experiences with other deployment of the same software. They even managed to get stuck in a problem that is not really common when configuring Redis with high load, it is not common to have replication problems because the default output buffer size limit.