I'm hoping to land this branch asap. https://review.openstack.org/#change,1192
It replaces all the "kind of alike" schedulers with a single DistributedScheduler. -S ________________________________________ From: openstack-bounces+sandy.walsh=rackspace....@lists.launchpad.net [openstack-bounces+sandy.walsh=rackspace....@lists.launchpad.net] on behalf of Christian Wittwer [wittwe...@gmail.com] Sent: Tuesday, November 01, 2011 5:38 AM To: Lorin Hochstein Cc: openstack@lists.launchpad.net Subject: Re: [Openstack] Which nova scheduler for different hardware sizes? Lorin, Thanks for your reply. Well the least cost scheduler with these cost functions looks interesting. Unfortunately there is not much documenation about it. Can somebody give me an example how to switch to that scheduler using the memory cost function which already exist? Cheers, Christian 2011/10/24 Lorin Hochstein <lo...@isi.edu>: > Christian: > You could use the least cost scheduler, but I think you'd have to write your > own cost function to take into account the different number of cores. > Looking at the source, the only cost function it comes with only takes into > account the amount of memory that's free, not loading in terms of total > physical cores and allocated virtual cores. (We use a custom scheduler at > our site, so I don't have any firsthand experience with the least-cost > scheduler). > Lorin > -- > Lorin Hochstein, Computer Scientist > USC Information Sciences Institute > 703.812.3710 > http://www.east.isi.edu/~lorin > > > > On Oct 22, 2011, at 3:17 AM, Christian Wittwer wrote: > > I'm planning to build a openstack nova installation with older > hardware. These servers obviously doesn't have the same hardware > configuration like memory and cores. > It ranges from 2 core and 4GB memory to 16 core and 64GB memory. I > know that there are different scheduler, but I'm not sure which one to > choose. > The simple scheduler tries to find the least used host, but the amount > of used cores per host (max_cores) is a constant, which doesn't work > for me. > Maybe the least cost scheduler would be the right one? But I'm not > sure, because I did not find any documenation about how to use it. > > Cheers, > Christian > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > > _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp