ACC-5595 Reflective Memory Switch

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ACC-5595 Reflective Memory Switch [Copy link]

VMIACC-5595-208

ACC5595 Hub

The 5595 series network hub is the core of reflective memory network data interaction.

Configurable from 1 to 8 ports.

The pluggable transceiver supports single-mode or multi-mode mode.

1x 8-port or 2 x 4-port.

You can understand the status through the serial port for control.

Product Introduction

The vmic5565 reflective memory real-time network transmission system is based on a ring or star-shaped, high-speed replicated shared memory network.

Features

vmic5565 network allows users to share data of applications on different computer platforms with the participation of different operating systems.

vmiacc-5595 switch : Automatically bypass faulty or incoherent reflective memory nodes

The fiber optic reflective memory network consists of three parts: a network card, a router, and a fiber optic. The network card model is VMIPCI-5565 from VMIC, and the router model is VMIACC-5595. The maximum transmission speed of the fiber optic reflective memory network is 170Mbyte/s, and it can support up to 256 nodes. The fiber optic reflective memory network has two configurations: ring and star. These two configurations are combined in actual applications, as shown in Figure 1. Its network structure is divided into two layers, the top layer is a ring, and the bottom layer is a star. The system master control scheduling computer and four routers form the top layer ring network, and each device computer is connected to the router to form the bottom layer node. The advantages of this hybrid structure are: 1. The time for the system clock information sent by the master computer to reach each node is relatively short and relatively consistent, which is conducive to the synchronous operation between system devices; 2. The simulation system has multiple simulation configuration modes, and each simulation configuration mode requires different devices. The hybrid structure fiber optic reflective memory network allows skipping unused nodes, so that the device nodes that are not used in certain test configurations do not need to be started and run. Figure 1 The system uses relatively cheap multimode optical fiber, and the maximum transmission distance between nodes is 300 meters, which meets the wiring requirements of the laboratory. However, when using multimode optical fiber, the top-level ring network is actually quasi-ring, and the top-level wiring must occupy two ports of each router. 2. Design of semi-physical simulation system The main control computer sets the simulation mode and device configuration of the simulation system through the optical fiber reflection memory network, is responsible for the release of the system clock, starts, pauses or terminates the operation of the system, and monitors the data exchange on the optical fiber reflection memory network, so as to master the operating status of each device in the system. The data throughput of this simulation system is very large when it is running. In addition to considering the basic hardware factors, it also needs to consider the communication protocol and information format scheme, as well as the way the software reads data, which will greatly affect the operating efficiency of the entire optical fiber reflection memory network.

Working as a dual-port memory, the local host writes to its reflective memory address space, which is one port of the local memory. The RFM board automatically transmits this new data out of its other port, which is an optical fiber connected to the network in a ring architecture, operating at a baud rate of 2.1G. The next RFM board in the network receives this new data, and its local memory will be updated within 400ns. The network of RFM products can greatly save software development costs because there is no need to write and test any application code, nor to write corresponding documents, and there is no need to maintain assembly information and decoding information, and parse data from input information. Software costs are the most expensive independent expenses that a company can control. RFM products do not require software and learning curves, which will greatly save time to market.
RFM product networks provide many features beyond standard networks. Features such as dual-port RFM, high-speed data transmission, and software transparency make RFM product networks simple to use and provide a powerful solution for multi-computer connectivity. Compared to traditional connectivity methods that require overhead for additional software development time, testing, maintenance, documentation, and extra CPU requirements, RFM product networks offer a highly cost-effective, high-performance option.