<div dir="ltr">Hey Helen,<div><br></div><div>The NFS Generic driver relies on QEMU rollback/commit which in some cases will merge the intermediary snapshots, so you would loose them. I think that there are others, really hard to tell, as looking at the code may not reveal what some backends do internally and I'm pretty sure not all backend maintainers will promptly inform if they support or not.</div><div><br></div><div>Erlon</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Em qua, 17 de abr de 2019 às 05:56, Walsh, Helen <<a href="mailto:Helen.Walsh@dell.com">Helen.Walsh@dell.com</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="EN-IE">To cinder driver developers:<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal" style="margin-left:18pt">
<u></u><span style="font-size:10pt;font-family:Symbol;color:black"><span>·<span style="font:7pt "Times New Roman"">
</span></span></span><u></u><span style="font-size:9pt;font-family:Arial,sans-serif;color:black;background:rgb(241,227,255)"><a href="https://blueprints.launchpad.net/cinder/+spec/support-revert-to-any-snapshot" target="_blank">https://blueprints.launchpad.net/cinder/+spec/support-revert-to-any-snapshot</a></span><span style="font-size:9pt;font-family:Arial,sans-serif;color:black"><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">In relation to the blueprint above. I am wondering if there are any drivers that whose later snapshots will not be valid after a revert to an snapshot that is NOT the last in the series<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> Vol1<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> \<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">-----------------------------------------------------<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">Mon Tue Wed Thu Fri<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> \ \ \ \ \<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> S1 -------- S2 ---------S3 -------- S4 ---------S5<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">If on Fri, I was to revert back to Tuesday’s Snapshot S2, would S3, S4 and S5 still be usable Snapshots?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> Vol1<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> \<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">-----------------------------------------------------<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">Mon Tue Wed Thu Fri<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> \ \ \ \ \<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"> S1 -------- <span style="background:lime">
S2</span> ---------<span style="background:yellow">S3 -------- S4 ---------S5</span><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">Thank you,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-IE">Helen<u></u><u></u></span></p>
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