Open Stack

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 03/11/2015 07:48 PM, Joe Gordon wrote:
> Out of sync Quotas ------------------
> 
> https://etherpad.openstack.org/p/PHL-ops-nova-feedback L63
> 
> The quotas code is quite racey (this is kind of a known if you look
> at the bug tracker). It was actually marked as a top soft spot
> during last fall's bug triage - 
> http://lists.openstack.org/pipermail/openstack-dev/2014-September/046517.html
>
>  There is an operator proposed spec for an approach here - 
> https://review.openstack.org/#/c/161782/
> 
> Action: we should make a solution here a top priority for enhanced 
> testing and fixing in Liberty. Addressing this would remove a lot
> of pain from ops.
> 
> 
> To help us better track quota bugs I created a quotas tag:
> 
> https://bugs.launchpad.net/nova/+bugs?field.tag=quotas
> 
> Next step is re-triage those bugs: mark fixed bugs as fixed,
> deduplicate bugs etc.

(Being quite far from nova code, so ignore if not applicable)

I would like to note that other services experience races in quota
management too. Neutron has a spec approved to land in Kilo-3 that is
designed to introduce a new quota enforcement mechanism that is
expected to avoid (some of those) races:

https://github.com/openstack/neutron-specs/blob/master/specs/kilo/better-quotas.rst

I thought you may be interested in looking into it to apply similar
ideas to nova.

/Ihar
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJVAMrNAAoJEC5aWaUY1u57aV8H/1jTSrpJYYRBH6hOrl2MlPNV
mgH+sszhKDZbNjHAlIjCGqu4/Rzbf7Xhp1ujhzQFA54UcQ/cKSsao7kgHcAGJ7ib
FHM8RIf0UNXw2KkvCc4gvrfEO0vxMkzWZ12RdtyKSJVxJgWNctnX6VI4f1ZS5mIb
S5mrpPxVyL/Hplr+Yy05m4S7ALyiKGVogCYtRYqnBaH3IIK9Nve3hyfzcgBvd+h+
9CfGeFX4WJr/JDGoDCNX/Zq9/SgVuEjm2fXgbZPaZDGoTc4RrrTe6TWi1g8mx/pD
QuTsyUu3CvRAr2qafPS4c2j0qEaooCsA22A8Il8mvnO7Rp12KkxCWojkoPvFOpA=
=JV5/
-----END PGP SIGNATURE-----