Thiago, Although nova is not explicitly aware of KSM, it is aware that deployers want to over commit their memory and cpu. Check out: http://docs.openstack.org/trunk/openstack-ops/content/compute_nodes.htmlthere's a section on overcommiting.
-MIke On Mon, Nov 4, 2013 at 3:35 PM, Martinx - ジェームズ <[email protected]>wrote: > Stackers! > > I'm thinking about something here... Linux have a very useful resource, > called KSM (Kernel SamePage Merging), which reduces (apparently a lot), the > amount of RAM memory used by KVM Virtual machines "of the same kind". > > This means that equal virtual machines "shares" portions of physical RAM > memory using CoW technique (right?). > > So, I think that would be cool for OpenStack scheduler (?), to "have Linux > KSM in mind" when launching a Instance, to try to get more from it, opening > a window to safely increase RAM overcommit allocation ratio. > > What do you guys think?! > > Best! > Thiago > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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