Hi, We have used tooz to enable concurrency. Zookeeper and Redis worked well. I think that it is certainly something that we need to consider. The challenge becomes a deployment. Thanks Gary
From: Damon Wang <damon.dev...@gmail.com> Reply-To: OpenStack List <openstack-dev@lists.openstack.org> Date: Tuesday, May 24, 2016 at 5:58 AM To: OpenStack List <openstack-dev@lists.openstack.org> Subject: Re: [openstack-dev] [neutron][ovo] NeutronDbObject concurrency issues Hi, I want to add an option which handle by another project Tooz. https://github.com/openstack/tooz<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_openstack_tooz&d=CwMFaQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=VlZxHpZBmzzkWT5jqz9JYBk8YTeq9N3-diTlNj4GyNc&m=BlFY_Ge8eQsKWmvzFjG8WDvC_476YtRBCancu5pAbt8&s=eX2MSKfmcWhBdoSfE7czdazEibklQWO9Z2bSdGtluOo&e=> with redis or some other drivers, it seems pretty a good choice. Any comments? Wei Wang 2016-05-17 6:53 GMT+08:00 Ilya Chukhnakov <ichukhna...@mirantis.com<mailto:ichukhna...@mirantis.com>>: On 16 May 2016, at 20:01, Michał Dulko <michal.du...@intel.com<mailto:michal.du...@intel.com>> wrote: It's not directly related, but this reminds me of tests done by geguileo [1] some time ago that were comparing different methods of preventing DB race conditions in concurrent environment. Maybe you'll also find them useful as you'll probably need to do something like conditional update to increment a revision number. [1] https://github.com/Akrog/test-cinder-atomic-states<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_Akrog_test-2Dcinder-2Datomic-2Dstates&d=CwMFaQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=VlZxHpZBmzzkWT5jqz9JYBk8YTeq9N3-diTlNj4GyNc&m=BlFY_Ge8eQsKWmvzFjG8WDvC_476YtRBCancu5pAbt8&s=NcW1-muP9ymke4gz9blqXQ1mbrfpmfLHZHjQspx6jMY&e=> Thanks for the link. The SQLA revisions are similar to the 'solutions/update_with_where', but they use the dedicated column for that [2]. And as long as it is properly configured, it happens 'automagically' (SQLA will take care of adding proper 'where' to 'update'). [2] http://docs.sqlalchemy.org/en/latest/orm/versioning.html<https://urldefense.proofpoint.com/v2/url?u=http-3A__docs.sqlalchemy.org_en_latest_orm_versioning.html&d=CwMFaQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=VlZxHpZBmzzkWT5jqz9JYBk8YTeq9N3-diTlNj4GyNc&m=BlFY_Ge8eQsKWmvzFjG8WDvC_476YtRBCancu5pAbt8&s=-WhOlX8NTukfXp5q3ud1TpLWsGMqRa4SlHYYYMGGTqs&e=> __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe<http://openstack-dev-requ...@lists.openstack.org?subject:unsubscribe> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
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