openstack/nova
Code Issues Proposed changes

Mistake with the documentation about cost function's weight corrected.

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Change-Id: I131d6abc100682ae78c7ac2edfffadc491b9d437
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Dina Belova
2012-05-03 15:40:50 +04:00
parent eb9e54c112
commit 8c938d3f7e
1 changed files with 7 additions and 2 deletions
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9
doc/source/devref/filter_scheduler.rst
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@@ -225,11 +225,16 @@ The line with this description looks the following way:
**function_name_weight**.
As for default cost function, it would be: `compute_fill_first_cost_fn_weight`,
and by default it is 1.0.
and by default it is -1.0.
::
--compute_fill_first_cost_fn_weight=1.0
--compute_fill_first_cost_fn_weight=-1.0
Negative function's weight means that the more free RAM Compute Node has, the
better it is. Nova tries to spread instances as much as possible over the
Compute Nodes. Positive weight here would mean that Nova would fill up a single
Compute Node first.
Filter Scheduler finds local list of acceptable hosts by repeated filtering and
weighing. Each time it chooses a host, it virtually consumes resources on it,