2ce5b11b1a
This patch changes the name of the Admin-Guide from the Cloud
Admin Guide to the Administrator guide. This affects the
filename in the repository, and references to cloud administrators
within the document texts.
1.) Changing instances of 'cloud administrator'
to 'administrator'.
2.) Change links from '/admin-guide-cloud/' to
'/admin-guide/' within the Admin Guide.
3.) Adjust .htaccess file.
Change-Id: I7f21a710e922981aa295afc0616de36fd819b523
Implements: blueprint user-guides-reorganised
34 lines
1.5 KiB
ReStructuredText
34 lines
1.5 KiB
ReStructuredText
.. _shared_file_systems_scheduling:
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==========
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Scheduling
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==========
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The Shared File Systems service uses a scheduler to provide unified
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access for a variety of different types of shared file systems. The
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scheduler collects information from the active shared services, and
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makes decisions such as what shared services will be used to create
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a new share. To manage this process, the Shared File Systems service
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provides Share types API.
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A share type is a list from key-value pairs called extra-specs. The
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scheduler uses required and un-scoped extra-specs to look up
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the shared service most suitable for a new share with the specified share type.
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For more information about extra-specs and their type, see `Capabilities
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and Extra-Specs <http://docs.openstack.org/developer/manila/devref/capabilities_and_extra_specs.html>`_ section in developer documentation.
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The general scheduler workflow:
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#. Share services report information about their existing pool number, their
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capacities, and their capabilities.
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#. When a request on share creation arrives, the scheduler picks a service
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and pool that best serves the request, using share type
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filters and back end capabilities. If back end capabilities pass through,
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all filters request the selected back end where the target pool resides.
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#. The share driver receives a reply on the request status, and lets the
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target pool serve the request as the scheduler instructs. The scoped
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and un-scoped share types are available for the driver implementation
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to use as needed.
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