A Virtual Machine Monitor for Utilizing Non-dedicated Clusters

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A Virtual Machine Monitor for Utilizing
Non-dedicated Clusters

• Kenji Kaneda Yoshihiro Oyama
• Akinori Yonezawa
• (University of Tokyo)

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What is the Goal of This Work?

• Build a virtual SMP on a cluster
• Commodity OS runs on a virtual SMP
• ? Easy management of distributed resources
• Various applications run on a guest OS
• ? Easy parallel programming with shell script,
  make command,

virtualization
virtual SMP
cluster
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Current Status

• Virtual 8-way SMP is built on a cluster of 8
  nodes
• Linux 2.4 runs as a guest OS

Virtual Machine Monitor (VMM)
host OS
Linux 2.4
Linux 2.4
Linux 2.4
physical machines
Processor
Processor
Processor

Memory
Memory
Memory
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Demo

• Distributing a workload with our VMM

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How to Implement our VMM

• Virtualize hardware resources
• Processors
• Para-virtualization
• Shared memory
• Similar to software DSM
• I/O devices
• A central server keeps track of virtual devices

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Support of Hotplug of Physical Machines

• VMM keeps a virtual SMP consistent even if
  physical machines are added or removed
• consistent of virtual processors is fixed

virtual N-way SMP
virtualization
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How to Support Hotplug

• VMM dynamically maps virtual processors to
  physical processors
• VMM moves some virtual processor to a newly
  added physical machine

virtual SMP
physical machines
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Future Work

• Performance Improvement
• Optimizing our memory coherence algorithm
• Fault tolerance
• with a distributed check-pointing algorithm

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Thank You for Your Attention

• Source code is available at
• http//www.yl.is.s.u-tokyo.ac.jp/projects/vin
  cs/