Computing Pool Peng Liu, Yao Shi, Sanli Li pengliuieee'org http:www'chinagrid'net

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Computing PoolPeng Liu, Yao Shi, San-li
Lipengliu_at_ieee.orghttp//www.chinagrid.net
a Simplified and Practical Computational Grid
Model
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Few Grid are Practical yet

• SF Express project
• military simulation
• 1998 world record

• Cactus project
• numerical relativity
• 2001 Gordon Bell Prize

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SF Express

• continue to incorporate emerging computational
  grid tools and techniques into the distributed
  interactive simulation environment

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Cactus
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Why?

• Bandwidth
• 100Mbps 10Gbps

• Latency
• 10ms 10µs

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Traditional Supercomputers

• Not share their resources
• Not convenient to the users
• Users application may be too big to run on it

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The Step is too high, so
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Computing Pool

• Dynamically shares CPU cycles among
  supercomputers
• Never divide one application into smaller parts
• It will provide a web portal

• Better utilize resource and provide better QoS
• Shun the complexity problem of decomposing
  applications
• Provides a convenient interface to users

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C M/M/1 Queuing System
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The Average Waiting Time
?1 is average arrival rate µ1 is average service
rate
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1 M/M/c Queuing System
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The Average Waiting Time
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Improved QoS
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Improved Efficiency
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A Middle Step Pads the Gap