openstack/openstack-manuals
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Merge "Added scheduler_driver_task_period info to scheduler section."

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Jenkins 2014-04-24 13:10:37 +00:00 committed by Gerrit Code Review
commit a1b74cc89b
1 changed files with 14 additions and 2 deletions
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16
doc/config-reference/compute/section_compute-scheduler.xml
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@ -23,9 +23,10 @@
means a physical node that has a <systemitem class="service"
>nova-compute</systemitem> service running on it. You can
configure the scheduler through a variety of options.</para>
<para>Compute is configured with the following default scheduler
options:</para>
<para>Compute is configured with the following default scheduler options in the
<filename>/etc/nova/nova.conf</filename> file:</para>
<programlisting language="ini">scheduler_driver=nova.scheduler.multi.MultiScheduler
scheduler_driver_task_period=60
compute_scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler
scheduler_available_filters=nova.scheduler.filters.all_filters
scheduler_default_filters=RetryFilter,AvailabilityZoneFilter,RamFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter</programlisting>
@ -62,6 +63,17 @@ scheduler_default_filters=RetryFilter,AvailabilityZoneFilter,RamFilter,ComputeFi
(<literal>ImagePropertiesFilter</literal>).</para>
</listitem>
</itemizedlist>
<para>The scheduler caches its list of available hosts; you can
specify how often the list is updated by modifying the
<option>scheduler_driver_task_period</option> value.
</para>
<note>
<para>Do not configure <option>service_down_time</option> to be
much smaller than <option>scheduler_driver_task_period</option>;
otherwise, hosts will appear to be dead while the host list is
being cached.</para>
</note>
<para>For information on the volume scheduler, refer the Block
Storage section of <link
xlink:href="http://docs.openstack.org/admin-guide-cloud/content/managing-volumes.html">