A continuous available (CA) server for medical imaging applications.
A continuous available (CA) server for medical imaging applications.
复制标题
用于医学成像应用的连续可用 (CA) 服务器。
DOI：
10.1016/j.acra.2004.03.053
复制
发表时间：
2004
影响因子：
4.8
通讯作者：
Zhou,Z
中科院分区：
文献类型：
--
作者：
Huang,HK;Liu,BrentJ;Zhou,Z
医学影像研究和应用的趋势是大型数据库的管理和操作，这需要一个强大的图像服务器来接收来自源的图像数据，并将其可靠地和及时地交付给用户。本文介绍了设计，实施和临床应用的连续可用（CA）的图像服务器为这些目的。CA映像服务器的设计基于具有三个冗余服务器模块的三重模块冗余服务器的概念。结合三个模块中的多数表决机制和故障转移软件，三重模块冗余服务器自动处理CA映像服务器中的所有单点故障硬件组件，以实现容错。描述了评估由网络连接、主板和磁盘存储故障引起的容错系统可靠性的方法和过程。在实验室和临床环境中的全面实验结果验证了图像服务器实现了99.999%的硬件启动时间（或5分钟/年的停机时间），满足硬件连续可用性的工业术语。在这些过程中，CA映像服务器的故障切换性能将自动制成表格。CA镜像服务器的应用非常广泛。给出了两个实例，包括图片存储和通信系统，以及使用应用服务提供商模型的异地备份存档。按照设计，CA映像服务器是便携式的、可扩展的、经济实惠的、易于安装的，并且在故障转移和系统恢复期间不需要人为干预。
The trend of medical imaging research and application is toward large database management and manipulation, which requires a robust image server to receive image data from sources and to deliver them to users reliably and in a timely fashion. This article describes the design, implementation, and clinical applications of a continuous available (CA) image server for these purposes. The design of the CA image server is based on the concept of a triple modular redundancy server with three redundant server modules. Coupled with a majority voting mechanism in the three modules and failover software, the triple modular redundancy server takes care of all single points of failure hardware components in the CA image server automatically to achieve fault tolerance. Methods and procedures of evaluating the fault tolerance system reliability caused by network connectivity, motherboard, and disk storage failures are described. Thorough experimental results in laboratory and clinical environments verify that the image server achieves 99.999% hardware up time (or 5 minutes/year down time), satisfying the industrial terminology of hardware continuous availability. Performance of failover of the CA image server is automatically tabulated during these procedures. Applications of CA image server are extensive. Two examples are given including Picture Archiving and Communication System, and off-site back-up archive using the Application Service Provider model. As designed, the CA image server is portable, scalable, affordable, easy to install, and requires no human intervention during failover and system recovery.