Single System Image Clustering
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Transcript Single System Image Clustering
Single System Image Clustering
Source
http://foundries.sourceforge.net/clusters/ind
ex.pl?node_id=38692&lastnode_id=131
Types of Clusters
High Performance (HP)
– Beowulf
Load-leveling
Web-service
Storage
Database
High Availability (HA)
Characteristics
Constructed from standard computers, or
nodes without any shared physical memory
There is an OS running on each node
Purpose
HA (High Availability)
HP (High Performance)
Parallel processing
Parallel web servicing
High Performance Clusters
Constructed to run parallel programs such
as weather simulations and data mining
A master node typically drives the cluster
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
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
Storage Clusters
Supply parallel highly available access to
filesystem data
Database Clusters
Provide parallel and HA access to a
database
Oracle Parallel Server (OPS)
High Availability Clusters
Often known as failover clusters
When a failure is detected scripts are used
to fail over IP addresses
SSI???
NASA Example
Mark Twain said everybody talks
about the weather, but nobody does
anything about it. Well, NASA is
trying to by installing a 1,024processor 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
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
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