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本文以市场上较为畅销的十个品种的64位PCI总线真彩色适配卡,在DOS下作了规范、详细的速度性能测试;介绍了64位PCI总线真彩色适配卡的突出对真彩色适配卡的比较和选型作了分析。 相似文献
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基于客户/服务器模型的CIMS集成软件平台的研究金尊和,吴澄(清华大学自动化系,国家CIMS工程研究中心·北京,100084)1CIMS与集成软件平台1.1CIMS软件危机CIMS集成不仅是各种自动化设备的物理集成,更是管理、设计和生产等各子系统的信... 相似文献
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介绍在VAX11/780与VAX11/750计算机的UNIBUS上扩充UC17SCAI适配器与大容量5.25SCSI磁盘子系统的外存扩充技术。 相似文献
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《CAD/CAM与制造业信息化》1995,(10)
数控编程子系统获奖软件介绍MicCIMS中的数控编程子系统(一等奖)微机集成CAD/CAM系统MICCIMS数控编程子系统,是北京航空工艺研究所研制的商品化软件,在此基础上开发的APTMG数控系统,在我国飞机产品的制造及波音飞机的委托工加中有多项重大... 相似文献
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为了满足国内机械制造行业对CAPP系统日益增长的需求,以及CIMS集成制造环境对CAPP子系统的特殊要求,我们在SUN-SPARC工作站和X-WINDOW环境下用C语言开发了汉化版本的CAPP专家系统开发工具Z-ESPP。本文简要介绍Z-ESPP主要功能模块的实现机制,包括:用户界面子系统、零件输入子系统、数据库系统、专家系统开发工具、工序图与工艺卡片生成系统。 相似文献
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Z—ESPP实现机制 总被引:1,自引:0,他引:1
为了满足国内机械制造行业对CAPP系统日益增长的需求,以及CIMS集成制造环境对CAPP子系统的特殊要求,我们在SUN-SPARC工作站和X-WINDOW环境下用C语言开发了汉化版本的CAPP专家系统开发工具Z-ESPP。本文简要介绍Z-ESPP主要功能模块的实现机制,包括:用户界面子系统、零件输入子系统、数据库系统、专家系统开发工具,工序图与工艺卡片生成和系统。 相似文献
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面对当前应用对现代存储的高性能以及可用性、可靠性的新的要求,在Multi—Initiator—Uni—Port的基础之上提出了SCSI中间层多启动互连多路径I/O的存储方式.它能够在Multi—Initiator—Uni—Port的连接中对同一个Target端口采用不同的I/O路径进行存储,减少了由于单路径I/O传输错误导致系统单点失效的可能性,增强了存储系统的可用性和可靠性;同时,这种存储方式还能够很好地平衡系统的I/O负载,提高系统的吞吐率,提供比传统单路径更好的传输性能.在Linux2.4内核中的SCSI子系统的基础之上实现了这种存储方式,向系统屏蔽了SCSI子系统中的设备具体细节,并且不依赖于SCSI上层的实现,减少了对系统内核的资源占有率,提高了SCSI底层的执行效率.分析了SCSI中间层多启动互连多路径I/O的存储方式的原理,并且将iSCSI的体系结构应用到它的模拟测试中,得到了R—R路径选择分配策略的性能临界点,取得了令人满意的结果. 相似文献
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视频服务器存储子系统的I/O优化 总被引:1,自引:1,他引:1
视频服务器存储子系统的I/O性能决定了视频服务器的总体性能。本文提出的一种新的实时磁盘调度算法(LLF-Window)能有效地服务各种编码格式的视频流,并对传统的SCSI总线不均衡调度机制进行了改造,实验结果表明,新的磁盘调度算法和改造后的SCSI总线调度机制有效地改进了视频服务器存储子系统的I/O性能,保证了视频流的连续播放。 相似文献
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To accommodate the explosively increasing amount of data in many areas such as scientific computing and e-Business, physical storage devices and control components have been separated from traditional computing systems to become a scalable, intelligent storage subsystem that, when appropriately designed, should provide transparent storage interface, effective data allocation, flexible and efficient storage management, and other impressive features. The design goals and desirable features of such a storage subsystem include high performance, high scalability, high availability, high reliability and high security. Extensive research has been conducted in this field by researchers all over the world, yet many issues still remain open and challenging. This paper studies five different online massive storage systems and one offline storage system that we have developed with the research grant support from China. The storage pool with multiple network-attached RAIDs avoids expensive store-and-forward data copying between the server and storage system, improving data transfer rate by a factor of 2-3 over a traditional disk array. Two types of high performance distributed storage systems for local-area network storage are introduced in the paper. One of them is the Virtual Interface Storage Architecture (VISA) where VI as a communication protocol replaces the TCP/IP protocol in the system. VISA's performance is shown to achieve better than that of IP SAN by designing and implementing the vSCSI (Vl-attached SCSI) protocol to support SCSI commands in the VI network. The other is a fault-tolerant parallel virtual file system that is designed and implemented to provide high I/O performance and high reliability. A global distributed storage system for wide-area network storage is discussed in detail in the paper, where a Storage Service Provider is added to provide storage service and plays the role of user agent for the storage system. Object based Storage Systems not only store data but also adopt the attributes and methods of objects that encapsulate the data. The adaptive policy triggering mechanism (APTM), which borrows proven machine learning techniques to improve the scalability of object storage systems, is the embodiment of the idea about smart storage device and facilitates the self-management of massive storage systems. A typical offline massive storage system is used to backup data or store documents, for which the tape virtualization technology is discussed. Finally, a domain-based storage management framework for different types of storage systems is presented in the paper. 相似文献
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分析了光缆通道(Fiber Channel,FC)与通用的SCSI(小型计算机系统接口)的主要区别,以及光缆通道较SCSI的优点,光缆通道可以实现大容量、高速度、高可靠性的数据传输。分析了光缆通道的拓扑结构和各级层结构。 相似文献
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