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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">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.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Gary<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Damon Wang <damon.devops@gmail.com><br>
<b>Reply-To: </b>OpenStack List <openstack-dev@lists.openstack.org><br>
<b>Date: </b>Tuesday, May 24, 2016 at 5:58 AM<br>
<b>To: </b>OpenStack List <openstack-dev@lists.openstack.org><br>
<b>Subject: </b>Re: [openstack-dev] [neutron][ovo] NeutronDbObject concurrency issues<o:p></o:p></span></p>
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<p class="MsoNormal">Hi, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I want to add an option which handle by another project Tooz.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a href="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=">https://github.com/openstack/tooz</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">with redis or some other drivers, it seems pretty a good choice.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any comments?<o:p></o:p></p>
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<p class="MsoNormal">Wei Wang<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2016-05-17 6:53 GMT+08:00 Ilya Chukhnakov <<a href="mailto:ichukhnakov@mirantis.com" target="_blank">ichukhnakov@mirantis.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal">On 16 May 2016, at 20:01, Michał Dulko <<a href="mailto:michal.dulko@intel.com" target="_blank">michal.dulko@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:Helvetica"><br>
It's not directly related, but this reminds me of tests done by geguileo<br>
[1] some time ago that were comparing different methods of preventing DB<br>
race conditions in concurrent environment. Maybe you'll also find them<br>
useful as you'll probably need to do something like conditional update<br>
to increment a revision number.<br>
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[1] </span><a href="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=" target="_blank"><span style="font-size:9.0pt;font-family:Helvetica">https://github.com/Akrog/test-cinder-atomic-states</span></a><o:p></o:p></p>
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<p class="MsoNormal">Thanks for the link. The SQLA revisions are similar to the 'solutions/update_with_where',<o:p></o:p></p>
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<p class="MsoNormal">but they use the dedicated column for that [2]. And as long as it is properly configured,<o:p></o:p></p>
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<p class="MsoNormal">it happens 'automagically' (SQLA will take care of adding proper 'where' to 'update').<o:p></o:p></p>
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<p class="MsoNormal">[2] <a href="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=" target="_blank">http://docs.sqlalchemy.org/en/latest/orm/versioning.html</a><o:p></o:p></p>
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