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Single System Image Clustering

Single System Image Clustering. Source. http://foundries.sourceforge.net/clusters/index.pl?node_id=38692&lastnode_id=131. Types of Clusters. High Performance (HP) Beowulf Load-leveling Web-service Storage Database High Availability (HA). Characteristics.

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Single System Image Clustering

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  1. Single System Image Clustering

  2. Source • http://foundries.sourceforge.net/clusters/index.pl?node_id=38692&lastnode_id=131

  3. Types of Clusters • High Performance (HP) • Beowulf • Load-leveling • Web-service • Storage • Database • High Availability (HA)

  4. Characteristics • Constructed from standard computers, or nodes without any shared physical memory • There is an OS running on each node

  5. Purpose • HA (High Availability) • HP (High Performance) • Parallel processing • Parallel web servicing

  6. High Performance Clusters • Constructed to run parallel programs such as weather simulations and data mining • A master node typically drives the cluster

  7. Load Leveling Clusters • Constructed to allow a user on one node to spread his/her workload transparently across multiple nodes • Designed for computationally intensive long running jobs that are not massively parallel

  8. Web-service Clusters • Load-leveling requests to a web site • Often referred to as a farm, however technology is developing that will allow increased clustering capacity • See the Linux Virtual Server (LVS) project

  9. Storage Clusters • Supply parallel highly available access to filesystem data

  10. Database Clusters • Provide parallel and HA access to a database • Oracle Parallel Server (OPS)

  11. High Availability Clusters • Often known as failover clusters • When a failure is detected scripts are used to fail over IP addresses

  12. SSI???

  13. NASA Example Mark Twain said everybody talks about the weather, but nobody does anything about it. Well, NASA is trying to by installing a 1,024-processor SGI Origin 3800 supercomputer at the NASA Ames Research Center in Moffet Field, Calif. Silicon Graphics says the machine, which will be used to predict climate patterns, is the

  14. NASA Example Cont. largest single-system image computer in the world. "We have improved our ability to simulate climate by a factor of 10," said Bill Feiereisen, chief of the NASA Advanced Supercomputing facility, in a statement. Source - InformationWeek BetweenTheLines 11/20/2001 [BetweenTheLines@update.informationweek.com]

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