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Cloud computing vs. Cluster computing

von Michael Mende — Zuletzt verändert: 18.06.2010 11:25

Cloud

Real servers

  • Boot from local disk or PXE
  • Install from FAI / CFengine
  • Update/Upgrade via CFengine
  • Only a very small Linux installation
  • Pacemaker to move virtual servers
  • Cluster file system (GFS, OCFS2, Ceph)
  • Xen or KVM kernel modules and userland tools
  • Routing tables

Virtual servers

  • Xen or KVM images
  • Boot very fast
  • Simple to backup
  • New or upgraded server images can be cloned and / or auto-configured by templates
  • Reside on cluster file system
  • Never store user data on vservers
  • Store user data (plain file, database etc.) on shared / shareable disk