UCD ECS 201A - Lecture 7- Interconnection Networks (97 pages)

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Lecture 7- Interconnection Networks



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Lecture 7- Interconnection Networks

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Pages:
97
School:
University of California, Davis
Course:
Ecs 201a - Special Study

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Lecture 7 Interconnection Networks Prof Fred Chong ECS 250A Computer Architecture Winter 1999 Adapted from Patterson CS252 Copyright 1998 UCB FTC W99 1 Review Storage System Issues Historical Context of Storage I O Secondary and Tertiary Storage Devices Storage I O Performance Measures Processor Interface Issues Redundant Arrays of Inexpensive Disks RAID ABCs of UNIX File Systems I O Benchmarks FTC W99 2 Review I O Benchmarks Scaling to track technological change TPC price performance as nomalizing configuration feature Auditing to ensure no foul play Throughput with restricted response time is normal measure FTC W99 3 I O to External Devices and Other Computers Processor interrupts Cache Memory I O Bus Main Memory I O Controller Disk Disk I O Controller Graphics I O Controller Network ideal high bandwidth low latency FTC W99 4 Networks Goal Communication between computers Eventual Goal treat collection of computers as if one big computer distributed resource sharing Theme Different computers must agree on many things Overriding importance of standards and protocols Fault tolerance critical as well Warning Terminology rich environment FTC W99 5 Example Major Networks IP internet Protocol TCP Transmission Control Protocol CS Net FDDI 100Mbps Phonenet ARPA net NSF Net CS Net Relay 1 6Mbps 10 Mbps Token Ring 4Mbps Ethernet T3 230Kbps T1 56Kbps Bitnet ATM X 25 Telenet Uninet FTC W99 6 Networks Facets people talk a lot about direct point to point vs indirect multi hop topology e g bus ring DAG routing algorithms switching aka multiplexing wiring e g choice of media copper coax fiber What really matters latency bandwidth cost reliability FTC W99 7 Interconnections Networks Examples MPP networks SP2 100s nodes 25 meters per link Local Area Networks Ethernet 100s nodes 1000 meters Wide Area Network ATM 1000s nodes 5 000 000 meters a k a end systems hosts a k a network communication subnet Interconnection Network FTC W99 8 More Network Background Connection of 2 or more



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