Feature Update Replicated Writes

In Harper 4.4, the introduction of the replication system "Plexus" has significantly enhanced performance, security, and reliability by eliminating the need for a message broker and establishing direct connections between nodes, enabling optimizations to the TCP level, secure mTLS connections, and robust consistency tracking. The new system demonstrated a remarkable average 50% increase in replicated write performance over Harper 4.3, with tests conducted across clusters of 4, 5, 6, and 8 nodes using both random and sequential primary keys to assess variability. The tests, which did not enable sharding, showed a mean performance improvement of 51% after excluding an outlier, indicating potential higher throughput with sharding. The benchmarks were conducted on a multi-node Harper cluster using Akamai Connected Cloud Instances, with high concurrency loads of 500 virtual users, testing record sizes of 400 bytes across 8 fields, and focusing on newly inserted records replicated to all nodes via REST API, executed by the k6 load test runner.

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