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<p><font size="2" face="sans-serif">just add my cents here.</font><br>
<br>
<font size="2" face="sans-serif">"Driver" concept make sense to my understaning. The current quantum underline plugins works and behaves more like </font><font size="2" face="serif">network connectivity provider </font><font size="2" face="sans-serif">on top of specific type of device, from hardware and software, from vendors to open source. You can only enable ONE of it to provide virtual network service, but can't deploy without it.Just like database driver, it provide access of data backend and can't be absent. However plugin is not a essential part. Multiple plugins can be enabled at the same time in many software cases. They can work together with host to provide more functionalities. </font><br>
<font size="2" face="sans-serif"><br>
</font><font size="1" face="serif"><b>Best Regards, </b></font><font size="1" face="serif"><br>
<br>
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<img width="16" height="16" src="cid:3__=C7BBF0DDDF8377408f9e8a93df938@cn.ibm.com" border="0" alt="Inactive hide details for Dan Wendlandt ---2012-07-31 14:50:45---Yes, we've had this discussion many times :) I agree that peop"><font size="2" color="#424282" face="sans-serif">Dan Wendlandt ---2012-07-31 14:50:45---Yes, we've had this discussion many times :) I agree that people find the term "plugin" confusing, but each time we've talked</font><br>
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<ul style="padding-left: 72pt"><font size="1" face="sans-serif"><b>Dan Wendlandt <dan@nicira.com></b></font><font size="1" face="sans-serif"> </font>
<p><font size="1" face="sans-serif">2012-07-31 14:45</font>
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OpenStack Development Mailing List <openstack-dev@lists.openstack.org></font></div></td></tr>
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<div align="right"><font size="1" face="sans-serif">To</font></div></td><td width="100%"><img width="1" height="1" src="cid:2__=C7BBF0DDDF8377408f9e8a93df938@cn.ibm.com" border="0" alt=""><br>
<ul style="padding-left: 7pt"><font size="1" face="sans-serif">"Sumit Naiksatam (snaiksat)" <snaiksat@cisco.com></font></ul>
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<div align="right"><font size="1" face="sans-serif">cc</font></div></td><td width="100%"><img width="1" height="1" src="cid:2__=C7BBF0DDDF8377408f9e8a93df938@cn.ibm.com" border="0" alt=""><br>
<ul style="padding-left: 7pt"><font size="1" face="sans-serif">OpenStack Development Mailing List <openstack-dev@lists.openstack.org>, "netstack@lists.launchpad.net" <netstack@lists.launchpad.net>, Willian Molinari <willian.molinari@locaweb.com.br></font></ul>
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<div align="right"><font size="1" face="sans-serif">Subject</font></div></td><td width="100%"><img width="1" height="1" src="cid:2__=C7BBF0DDDF8377408f9e8a93df938@cn.ibm.com" border="0" alt=""><br>
<ul style="padding-left: 7pt"><font size="1" face="sans-serif">Re: [openstack-dev] [Netstack] [Quantum] plugin -> backend</font></ul>
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<font size="3" face="serif">Yes, we've had this discussion many times :) I agree that people find the term "plugin" confusing, but each time we've talked about it, we've failed to find a single term that is substantially better to warrant the confusion likely to be caused by renaming. </font><br>
<br>
<font size="3" face="serif">In some cases I've started using the term "engine" when describing the plugin concept to people, since its really about a "pluggable backend" that powers the generic quantum API layer. The name "driver" was very intentionally not chosen, as driver implies that it is specific to a particular type of back-end device, whereas a Quantum plugin is really more about an overall strategy of creating logical networks, etc. For example, you could have a generic VLAN plugin that has drivers to talk to many different types of switches. </font><br>
<br>
<font size="3" face="serif">Dan<br>
</font><br>
<font size="3" face="serif">On Mon, Jul 30, 2012 at 7:55 PM, Sumit Naiksatam (snaiksat) <</font><a href="mailto:snaiksat@cisco.com" target="_blank"><font size="3" color="#0000FF" face="serif"><u>snaiksat@cisco.com</u></font></a><font size="3" face="serif">> wrote:</font>
<ul style="padding-left: 9pt"><font size="2" color="#1F497D" face="Calibri">Hi,</font>
<p><font size="2" color="#1F497D" face="Calibri"> </font>
<p><font size="2" color="#1F497D" face="Calibri">I believe there are two topics of discussion here, one of which is the terminology. The way things are implemented today, I agree that the “plugin” terminology seems a bit confusing. However, probably the bigger topic of discussion is what kind of a design is preferable, “backend” versus “plugin”? As Yong points out, today’s Quantum service completely relies on the plugin for providing all functionality, including functionality that is probably common across plugins (like state management of logical resources, IPAM, etc.). Going forward, would it make sense to push some of the common functionality into the Quantum service, and have plugins which actually behave like the name suggests?</font>
<p><font size="2" color="#1F497D" face="Calibri"> </font>
<p><font size="2" color="#1F497D" face="Calibri">Thanks,</font>
<p><font size="2" color="#1F497D" face="Calibri">~Sumit.</font>
<p><font size="2" color="#1F497D" face="Calibri"> </font>
<p><font size="2" face="Tahoma"><b>From:</b></font><font size="2" face="Tahoma"> netstack-bounces+snaiksat=</font><a href="mailto:cisco.com@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Tahoma"><u>cisco.com@lists.launchpad.net</u></font></a><font size="2" face="Tahoma"> [mailto:</font><a href="mailto:netstack-bounces%2Bsnaiksat" target="_blank"><font size="2" color="#0000FF" face="Tahoma"><u>netstack-bounces+snaiksat</u></font></a><font size="2" face="Tahoma">=</font><a href="mailto:cisco.com@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Tahoma"><u>cisco.com@lists.launchpad.net</u></font></a><font size="2" face="Tahoma">] </font><font size="2" face="Tahoma"><b>On Behalf Of </b></font><font size="2" face="Tahoma">Yong Sheng Gong</font><font size="2" face="Tahoma"><b><br>
Sent:</b></font><font size="2" face="Tahoma"> Monday, July 30, 2012 7:05 PM</font><font size="2" face="Tahoma"><b><br>
To:</b></font><font size="2" face="Tahoma"> Willian Molinari</font><font size="2" face="Tahoma"><b><br>
Cc:</b></font><font size="2" face="Tahoma"> OpenStack Development Mailing List; </font><a href="mailto:netstack@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Tahoma"><u>netstack@lists.launchpad.net</u></font></a><font size="2" face="Tahoma"><b><br>
Subject:</b></font><font size="2" face="Tahoma"> Re: [Netstack] [Quantum] plugin -> backend</font>
<p><font size="3" face="serif"> </font>
<p><font size="2" face="Verdana">Hi,<br>
Add it into openstack-dev and [quantum] into the subject.<br>
<br>
Yes, 'backend' seems better than 'plugin' for our case here.<br>
<br>
Our plugin is a must for quantum server to work, while 'plugin' tends to make us think it will provide more functionalities if we plug it in.<br>
And I don't think our plugin is 'pluggable backend'. I prefer to call it 'replaceable or configurable' 'backend' or 'dirver'. <br>
<br>
Thanks<br>
Yong Sheng Gong<br>
<br>
<br>
</font><font size="2" color="#0000FF" face="Verdana"><u><br>
</u></font><a href="mailto:-----netstack-bounces+gongysh=cn.ibm.com@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Verdana"><u>-----netstack-bounces+gongysh=cn.ibm.com@lists.launchpad.net</u></font></a><font size="2" color="#990099" face="Verdana"> wrote: -----</font>
<p><font size="2" face="Verdana">To: </font><a href="mailto:netstack@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Verdana"><u>"netstack@lists.launchpad.net"</u></font></a><font size="2" face="Verdana"> </font><a href="mailto:netstack@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Verdana"><u><netstack@lists.launchpad.net></u></font></a><font size="2" face="Verdana"><br>
From: Willian Molinari <br>
Sent by: </font><a href="mailto:netstack-bounces+gongysh=cn.ibm.com@lists.launchpad.net" target="_blank"><font size="2" color="#0000FF" face="Verdana"><u>netstack-bounces+gongysh=cn.ibm.com@lists.launchpad.net</u></font></a><font size="2" face="Verdana"><br>
Date: 07/31/2012 07:26AM<br>
Subject: [Netstack] plugin -> backend</font>
<p><font size="2" face="Tahoma">Æ!!<br>
<br>
Hi folks!<br>
<br>
I was concerned to bring the "plugins" discussion because it looks like a bikeshedding <br>
and it probably was discussed before, but I think it will be beneficial at all.<br>
<br>
What motivated me to bring the discussion was the Metaplugin implementation <br>
(</font><a href="https://review.openstack.org/#/c/10181/" target="_blank"><font size="2" color="#0000FF" face="Tahoma"><u>https://review.openstack.org/#/c/10181/</u></font></a><font size="2" face="Tahoma">) that looks like a quantum backend implementing<br>
support for plugins.<br>
<br>
When we first looked into quantum we thought that quantum plugin was following the same <br>
concept of all other plugins (ie we should install a lot of plugins to enhance the application)<br>
but we found that this is not the concept of quantum plugins, talking to Dan about this at<br>
the openstack summit I found the real concept of quantum plugins and I heard some people<br>
saying that plugins should be something like a "pluggable backend", so why not to call the <br>
plugin just "backend"?<br>
<br>
Looks natural to have just one backend at time and this backend should handle multiple<br>
plugins if needed (the metaplugin case).<br>
<br>
Sorry for bringing a non-technical discussion like this but every time someone asks me to <br>
explain what quantum does I need to show plugins as "backends" to make sense.<br>
<br>
I'm the only guy that think it's confusing? :P<br>
<br>
Just want to hear your ideas about this topic. </font>
<p><font size="2" face="Tahoma">--<br>
Willian Molinari<br>
(a.k.a PotHix)</font>
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<font size="3" face="serif">-- <br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>
Dan Wendlandt </font><br>
<font size="3" face="serif">Nicira, Inc: </font><a href="http://www.nicira.com/" target="_blank"><font size="3" color="#0000FF" face="serif"><u>www.nicira.com</u></font></a><br>
<font size="3" face="serif">twitter: danwendlandt<br>
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