Thanks! I have to say tho that we mostly started by coding, then tried to capture what worked as a prototype.
We might be able to use the instance_metadata table for the xpu_info, cpu_info, and net_info fields instead of json strings (although cpu_info was put in by live_migration merge), but our ArchitectureScheduler component needs to filter instances on cpu_arch, xpu_arch, and net_arch fields when summing the consumed resources. Basically, we need to find a box that has N vcpus of a given architecture, and/or M accelerators in addition in addition to memory and disk (and virtualization). This is a much more efficient query I think from inside instances. A sub-select through metadata would be bad. The scheduler really needs a lot of work to be scalable. If I understand how SimpleScheduler works, it assumes every compute node in your system has the same number of cores! ArchitectureScheduler is comparing vcpus to vcpus_used in compute_nodes table to find resources, although I am concerned our approach might induce a race condition. Brian Brian Schott bfsch...@gmail.com On Apr 1, 2011, at 6:55 PM, Ferran Rodenas wrote: > Brian, nice spec! It's a great example of why I appreciate detailed > blueprints. > > Although I think it's very interesting to store more information about > instance types, I'd be more cautious in creating new columns if it's not > strictly necessary. I'd prefer a metadata table, something similar to the > instance_metadata table. In this way, each provider can adjust the attributes > to their real needs or imagination :) > > - Ferdy > > > _______________________________________________ > 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
