openstack/openstack-manuals
Code Issues Proposed changes

Add Nova Scheduler IO Ops Weighter

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Add a new nova scheduler weighter, sort the filter
hosts according to host io ops number, aims to
instances on light workload hosts.

Change-Id: I6b9a87c3ea3c6979d04f51eb082e14acc0334c5f
Closes-Bug: #1383178
This commit is contained in:
Kuo-tung Kao 2015-06-25 10:43:32 +08:00
parent b15f3a9921
commit 1a80a71735
1 changed files with 8 additions and 0 deletions
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8
doc/config-reference/compute/section_compute-scheduler.xml
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@ -883,6 +883,13 @@ isolated_images = 342b492c-128f-4a42-8d3a-c5088cf27d13, ebd267a6-ca86-4d6c-9a0e-
RamWeigher and MetricsWeigher. Hosts are then weighted and sorted
with the largest weight winning.</td>
</tr>
<tr valign="top">
<td>[DEFAULT]</td>
<td><literal>io_ops_weight_multiplier</literal></td>
<td>Multiplier used for weighing host I/O operations. A negative
value means a preference to choose light workload
compute hosts.</td>
</tr>
<tr valign="top">
<td>[metrics]</td>
<td><literal>weight_multiplier</literal></td>
@ -938,6 +945,7 @@ isolated_images = 342b492c-128f-4a42-8d3a-c5088cf27d13, ebd267a6-ca86-4d6c-9a0e-
scheduler_host_subset_size = 1
scheduler_weight_classes = nova.scheduler.weights.all_weighers
ram_weight_multiplier = 1.0
io_ops_weight_multiplier = 2.0
[metrics]
weight_multiplier = 1.0
weight_setting = name1=1.0, name2=-1.0