openstack/nova
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Merge "Add doc update for 4 filters which is missing in filter_scheduler.rst"

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2014-03-21 16:51:33 +00:00
committed by Gerrit Code Review
parent 00678ab3e3 35637ff218
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doc/source/devref/filter_scheduler.rst
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@@ -89,6 +89,23 @@ There are some standard filter classes to use (:mod:`nova.scheduler.filters`):
fall back to the global default ``ram_allocation_ratio``. If more than one value
is found for a host (meaning the host is in two different aggregate with
different ratio settings), the minimum value will be used.
* |DiskFilter| - filters hosts by their disk allocation. Only hosts with sufficient
disk space to host the instance are passed.
``disk_allocation_ration`` setting. It's virtual disk to physical disk
allocation ratio and it's 1.0 by default. The total allow allocated disk size will
be physical disk multiplied this ratio.
* |NumInstancesFilter| - filters hosts by number of running instances on it.
hosts with too many instances will be filtered.
``max_instances_per_host`` setting. Maximum number of instances allowed to run on
this host, the host will be ignored by scheduler if more than ``max_instances_per_host``
are already existing on the host.
* |IoOpsFilter| - filters hosts by concurrent I/O operations on it.
hosts with too many concurrent I/O operations will be filtered.
``max_io_ops_per_host`` setting. Maximum number of I/O intensive instances allowed to
run on this host, the host will be ignored by scheduler if more than ``max_io_ops_per_host``
instances such as build/resize/snapshot etc are running on it.
* |PciPassthroughFilter| - Filter that schedules instances on a host if the host
has devices to meet the device requests in the 'extra_specs' for the flavor.
* |SimpleCIDRAffinityFilter| - allows to put a new instance on a host within
the same IP block.
* |DifferentHostFilter| - allows to put the instance on a different host from a
@@ -323,6 +340,10 @@ in :mod:``nova.tests.scheduler``.
.. |JsonFilter| replace:: :class:`JsonFilter <nova.scheduler.filters.json_filter.JsonFilter>`
.. |RamFilter| replace:: :class:`RamFilter <nova.scheduler.filters.ram_filter.RamFilter>`
.. |AggregateRamFilter| replace:: :class:`AggregateRamFilter <nova.scheduler.filters.ram_filter.AggregateRamFilter>`
.. |DiskFilter| replace:: :class:`DiskFilter <nova.scheduler.filters.disk_filter.DiskFilter>`
.. |NumInstancesFilter| replace:: :class:`NumInstancesFilter <nova.scheduler.filters.num_instances_filter.NumInstancesFilter>`
.. |IoOpsFilter| replace:: :class:`IoOpsFilter <nova.scheduler.filters.io_ops_filter.IoOpsFilter>`
.. |PciPassthroughFilter| replace:: :class:`PciPassthroughFilter <nova.scheduler.filters.pci_passthrough_filter.PciPassthroughFilter>`
.. |SimpleCIDRAffinityFilter| replace:: :class:`SimpleCIDRAffinityFilter <nova.scheduler.filters.affinity_filter.SimpleCIDRAffinityFilter>`
.. |GroupAntiAffinityFilter| replace:: :class:`GroupAntiAffinityFilter <nova.scheduler.filters.affinity_filter.GroupAntiAffinityFilter>`
.. |GroupAffinityFilter| replace:: :class:`GroupAffinityFilter <nova.scheduler.filters.affinity_filter.GroupAffinityFilter>`