<div dir="ltr">Hi Zhidong,<div><br></div><div>Unfortunately stable/kilo branch is opened only for security fixes now. So we can't backport this fix.<br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div>Regards,<br>Ivan Kolodyazhny,<br><a href="http://blog.e0ne.info/" target="_blank">http://blog.e0ne.info/</a></div></div></div></div>
<br><div class="gmail_quote">On Mon, Nov 23, 2015 at 4:43 AM, Zhidong Yu <span dir="ltr"><<a href="mailto:zdyu2000@gmail.com" target="_blank">zdyu2000@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">It seems there was a bug introduced in Kilo and then fixed in Liberty [6]. However, since there are more users of Kilo than of Liberty, I am wondering if the fix has been back ported to Kilo. I could not find it except for this one [7] which seems to be a different issue.<br><div><br></div><div><span style="font-size:12.8px">[6] </span><a href="https://review.openstack.org/#/c/200039/" style="font-size:12.8px" target="_blank">https://review.openstack.org/#/c/200039/</a><br></div><div>[7] <a href="https://bugs.launchpad.net/cinder/+bug/1465819" target="_blank">https://bugs.launchpad.net/cinder/+bug/1465819</a> <br></div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Thu, Oct 1, 2015 at 3:00 AM, Ivan Kolodyazhny <span dir="ltr"><<a href="mailto:e0ne@e0ne.info" target="_blank">e0ne@e0ne.info</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><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" target="_blank">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" target="_blank">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" target="_blank">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" target="_blank">https://review.openstack.org/228857</a></div><div>[5] <a href="https://blueprints.launchpad.net/cinder/+spec/block-device-driver-via-iscsi" target="_blank">https://blueprints.launchpad.net/cinder/+spec/block-device-driver-via-iscsi</a></div><div>[6] <a href="https://review.openstack.org/#/c/200039/" target="_blank">https://review.openstack.org/#/c/200039/</a></div><div><br></div><br clear="all"><div><div>Regards,<br>Ivan Kolodyazhny<br></div></div>
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