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Deterministic, Low Latency, High Speed Memory Sharing For Demanding Applications

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A low-profile PCI Express reflective memory node card is designed for real-time applications such as simulation and training, industrial process control and data streaming and acquisition. The PCIE-5565PIORC from GE Intelligent Platforms will also serve a broad range of commercial, telecommunications and military/aerospace applications that require redundancy for high availability. Such applications are characterized by the need to move and share data at fast, deterministic rates and, in many cases, the only solution in such environments is reflective memory. 

The board features 2.12 Gbaud serial connection speed, improved Programmed I/O (PIO) read performance, field upgradeable firmware and RoHS compliance, and the maximum PCI burst rate has been doubled to 512 Mbytes/s: larger memory (256 Mbytes) is also supported. GE’s reflective memory networks can be scaled to 256 nodes and operate at speeds up to 174 Mbytes/s. Distance between nodes can be up to 10 kilometers. 

A reflective memory network is a special type of shared memory system that enables multiple, separate computers to share a common set of data. It autonomously replicates the contents of one processor’s memory to the memory nodes of all other network members. Reflective memory can offer an attractive solution in many demanding applications because of its low latency and determinism. Using reflective memory, the typical node-to-node propagation time is on the order of 1 microsecond. Thus, in a system of 30 nodes, it would take only 30 microseconds to propagate through the network to all nodes. Achieving the same latency using other network technologies, such as Ethernet, is extremely difficult—if not impossible—even using datagram broadcast because of IP protocol overheads, addressing, and memory write times.

GE Intelligent Platforms, Charlottesville, VA. (800) 368-2738. [www.ge-ip.com].