On 09/07/2013, at 2:53 AM, John Griffith <john.griff...@solidfire.com> wrote:
> > > > On Sun, Jul 7, 2013 at 5:43 PM, Sam Morrison <sorri...@gmail.com> wrote: > Hi, > > I'm wondering if anyone is using cinder and is having issue with the list > volumes API call. > > We have a grizzly install and we're at about 160 active volumes in cinder at > the moment. > > To do "cinder list" with a tenant that has about 140 volumes it takes about 6 > seconds. > API calls on a specific volume are done in about 0.1 seconds so I'm happy > with the API servers, it's the code I'm worried about. > > Doing a "cinder list --all-tenants" as an admin it takes about 20 seconds. > > Looking at the code it seems as an admin it will iterate over every volume 3 > times and do a db requests on each volume. > As a normal user it iterates over every volume once. > > The for loops are for adding glance image information and as an admin it also > adds host and tenant information which is in the same table so it's a bit > strange that it's doing more DB calls. > > Does anyone use cinder with more that just a couple of active volumes and if > so how do they when requests are so slow? > We have 36 cinder-api servers handling requests and they aren't under > significant load. Also our DB cluster is handling things fine. > > Cheers, > Sam > > > > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp > > Hi Sam, > Definitely some things in this area that cause problems at scale, I'm not > sure exactly where you're looking at in terms of the loops? > > We did recently submit a bug fix [1] related to some of this, but I don't > think it covers the case you're describing and it has NOT been backported to > Grizzly. > > If you'd like to point me specifically to the loops your describing I'm happy > to take a look and see if we can fix this up. > > Thanks, > John > > [1] http://tinyurl.com/jwgpxpr > > Hi John, We opened a bug about this: https://bugs.launchpad.net/cinder/+bug/1197612 Cheers, Sam
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