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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Hi list,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">There are two driver modes in manila currently, “multi_svm_mode” and “single_svm_mode”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">"multi_svm_mode" means usage of share-networks that contain network information for dynamic creation of share-servers (SVMs).<br>
"single_svm_mode" means usage of predefined some endpoint, without need to provide share-network and without creation of share-servers (SVMs).
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Currently, the name of driver mode describes how many servers the driver can handle.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">For
</span><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">"multi", it says that share driver can handle more than one server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">And, if someone share server is just already exist from share driver, but it uses some server anyway with host address, username, password, NFS daemon, etc... are defined
as works in "single_svm" mode too.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">But, as a new user to manila, these names make me really confusing.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Because I thought the driver mode names describe how drivers works with share-servers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">I thought “multi-” and “single-” indicate the number of share-servers would been created when we create a share, if we are using the driver.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Obviously, my understanding is wrong.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">When we’re working under driver generic, one share-server would be created for one share-network.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">When we’re working under driver glusterfs, no share-server would be created at all.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">I believe I would not be the only one who is making this mistake.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">To make code more readable, I’d like to suggest to rename driver mode names.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Name them based on behavior but not ability.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">I think three driver modes are needed:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">dynamic_svm_mode :
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> Usage of share-networks that contain network information for dynamic creation of share-servers (SVMs).
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> This is how current generic driver works.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> Under this mode, driver manages share servers itself, and share-server would be created and deleted
with related shares.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">static_svm_mode: Using pre-create share servers.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> The case as
<a href="https://review.openstack.org/#/c/144342/">https://review.openstack.org/#/c/144342/</a><o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""> Under this mode, driver do not manage share servers, but work with them.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:27.0pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">no_svm_mode: the case as driver glusterfs working currently, no share-server would be created.<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif"">-chen<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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