On Mar 2, 2012, at 12:50 PM, Jay Pipes wrote:
>
> We are not using multiprocessing, no.
>
> We simply start multiple worker processes listening on the same socket, with
> each worker process having an eventlet greenthread pool.
>
> You can see the code (taken from Swift and adapted by Chris Behrens and Brian
> Waldon to use the object-oriented Server approach that Glance/Keystone/Nova
> uses) here:
>
> https://github.com/openstack/glance/blob/master/glance/common/wsgi.py
>
> There is a worker = XXX configuration option that controls the number of
> worker processes created on server startup. A worker value of 0 indicates to
> run identically to the way Nova currently runs (one process with an eventlet
> pool of greenthreads)
This would be excellent to add to nova as an option for performance reasons.
Especially since you can fallback to the 0 version. I'm always concerned with
mixing threading and eventlet as it leads to really odd bugs, but it sounds
like HP has vetted it. If we keep 0 as the default I don't see any reason why
it couldn't be added.
Vish
_______________________________________________
Mailing list: https://launchpad.net/~openstack
Post to : openstack@lists.launchpad.net
Unsubscribe : https://launchpad.net/~openstack
More help : https://help.launchpad.net/ListHelp
