<div dir="ltr"><div>Hi team,</div><div><br></div><div>I know that Block Device Driver (BDD) is not popular in Cinder community. The main issues were:</div><div><br></div><div>* driver is not good maintained</div><div>* it doesn't feet minimum features set</div><div>* there is no CI for it</div><div>* it's not a Cinder way/it works only when instance and volume are created on the same host</div><div>* etc</div><div><br></div><div>AFAK, it's widely used in Sahara & Hadoop communities because it works fast. I won't discuss driver's performance in this thread. I share my performance tests results once I'll finish it.</div><div><br></div><div>I'm going to share drive updates with you about issues above.</div><div><br></div><div>1) driver is not good maintained - we are working on it right now and will fix any found issues. We've got devstack plugin [1] for this driver.</div><div><br></div><div>2) it doesn't feet minimum features set - I've filed a blueprint [2] for it. There are patches that implement needed features in the gerrit [3].</div><div><br></div><div>3) there is no CI for it - In Cinder community, we've got strong requirement that each driver must has CI. I've absolutely agree with that. That's why new infra job is proposed [4].</div><div><br></div><div>4) it works only when instance and volume are created on the same host - I've filed a blueprint [5] but after testing I've found that it's already implemented by [6].</div><div><br></div><div><br></div><div>I hope, I've answered all questions that were asked in IRC and in comments for [6]. I will do my best to support this driver and propose fix to delete if community decide to delete it from the cinder tree</div><div><br></div><div><br></div><div>[1] <a href="https://github.com/openstack/devstack-plugin-bdd">https://github.com/openstack/devstack-plugin-bdd</a></div><div>[2] <a href="https://blueprints.launchpad.net/cinder/+spec/block-device-driver-minimum-features-set">https://blueprints.launchpad.net/cinder/+spec/block-device-driver-minimum-features-set</a><br></div><div>[3] <a href="https://review.openstack.org/#/q/status:open+project:openstack/cinder+branch:master+topic:bp/block-device-driver-minimum-features-set,n,z">https://review.openstack.org/#/q/status:open+project:openstack/cinder+branch:master+topic:bp/block-device-driver-minimum-features-set,n,z</a></div><div>[4] <a href="https://review.openstack.org/228857">https://review.openstack.org/228857</a></div><div>[5] <a href="https://blueprints.launchpad.net/cinder/+spec/block-device-driver-via-iscsi">https://blueprints.launchpad.net/cinder/+spec/block-device-driver-via-iscsi</a></div><div>[6] <a href="https://review.openstack.org/#/c/200039/">https://review.openstack.org/#/c/200039/</a></div><div><br></div><br clear="all"><div><div class="gmail_signature">Regards,<br>Ivan Kolodyazhny<br></div></div>
</div>