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Xen 3.0 Virtualization Interface Guide
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7. Xenstore

Xenstore is the mechanism by which control-plane activities occur. These activities include:

  • Setting up shared memory regions and event channels for use with the split device drivers.
  • Notifying the guest of control events (e.g. balloon driver requests)
  • Reporting back status information from the guest (e.g. performance-related statistics, etc).

The store is arranged as a hierachical collection of key-value pairs. Each domain has a directory hierarchy containing data related to its configuration. Domains are permitted to register for notifications about changes in subtrees of the store, and to apply changes to the store transactionally.

Xen 3.0 Virtualization Interface Guide
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