Intel

Hazelcast ran internal benchmarks to determine the performance characteristics of Optane PMem compared against DRAM. The Hazelcast benchmarks executed in various setups used a three-node cluster and a single-node as well. The members were running on dual-socket servers equipped with Intel Scalable Xeon CPUs with 1.5TB each of PMem. Twelve of the 24 total DIMM slots (6 channels per socket and 2 slots per channel) were filled with 128GB PMem DIMMs for a total 1.5TB of PMem. The other slots contained DRAM DIMMs, as the proper configuration of PMem requires a DRAM DIMM placed adjacent to a PMem DIMM, though the DRAM DIMM can have a much smaller storage capacity. The system was measured for throughput and latency using an equal combination of reads and writes using a load testing tool. The reads and writes were against a key-value store (“maps”) in which the values were data objects that ranged in size per each test run.

With the use of PMem App Direct Mode, Hazelcast was optimized to take advantage of the fast data access capabilities of PMem. Unlike other uses of PMem, App Direct Mode has a dedicated application programming interface (API) that Hazelcast incorporated in its software to achieve the fastest speeds on PMem.

The benchmarks showcase that Intel Optane is capable of achieving DRAM-like speeds in the distributed environment. As shown in the table below, the throughput performance of Optane PMem were very similar to that of DRAM. Even with data object sizes of 10KB, the throughput was similar, with the throughput for DRAM averaged 360,000 operations per second and Intel Optane exceeded 340,000 operations per second on a single node.