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| author | Jenkins <jenkins@review.openstack.org> | 2012-05-09 19:12:06 +0000 |
|---|---|---|
| committer | Gerrit Code Review <review@openstack.org> | 2012-05-09 19:12:06 +0000 |
| commit | 36a810e5456e4ef1c328d433c24a68a1c1ce886d (patch) | |
| tree | d00913f9a4c8da604b5ee127760b4ddc4dc29775 /doc/source | |
| parent | e95102036137797e13ccdc8e889b8d5cecbedf91 (diff) | |
| parent | 8c938d3f7e364a7c191182cb16ed28af35ee3f02 (diff) | |
| download | nova-36a810e5456e4ef1c328d433c24a68a1c1ce886d.tar.gz nova-36a810e5456e4ef1c328d433c24a68a1c1ce886d.tar.xz nova-36a810e5456e4ef1c328d433c24a68a1c1ce886d.zip | |
Merge "Mistake with the documentation about cost function's weight corrected."
Diffstat (limited to 'doc/source')
| -rw-r--r-- | doc/source/devref/filter_scheduler.rst | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/source/devref/filter_scheduler.rst b/doc/source/devref/filter_scheduler.rst index 91ae3e495..5ae5bcd4e 100644 --- a/doc/source/devref/filter_scheduler.rst +++ b/doc/source/devref/filter_scheduler.rst @@ -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, |