<div dir="ltr"><div><div><div>Hi<span lang="EN-GB"> Simone<u></u><u></u></span>,<br><br></div><div>The multipath health is built on VDSM start from the current multipath state, and after that it is maintained based on events sent by udev.<br></div><div></div>You can read about the implementation details in [1].<br><br></div>It seems that in your scenario, either udev did not sent the needed clearing events or that Vdsm mishandled them.<br></div><div>Therefore only restart of the Vdsm will clear the report.<br><br></div>In order to be able to debug the issue, we will need Vdsm logs with debug level (on storage log) when the issue is happening.<br><div><br><div><div>Thanks,<br></div><div>Fred<br></div><div><br>[1] <a href="https://ovirt.org/develop/release-management/features/storage/multipath-events/">https://ovirt.org/develop/release-management/features/storage/multipath-events/</a><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 9, 2018 at 1:07 PM, Bruckner, Simone <span dir="ltr"><<a href="mailto:simone.bruckner@fabasoft.com" target="_blank">simone.bruckner@fabasoft.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hi,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="EN-GB"> after rebooting SAN switches we see faulty multipath entries in VDSM.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Running vdsm-client Host getStats shows multipathHealth entries<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB">"multipathHealth": {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> "<wbr>3600601603cc04500a2f9cd597080d<wbr>b0e": {<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> "valid_paths": 2,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> "failed_paths": [<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> "sdcl",<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> "sdde"<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> ]<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> },<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New"" lang="EN-GB"> …<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Running multipath –ll does not show any errors.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">After restarting VSDM, the multipathHealth entires from vdsm-client are empty again.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Is the a way to clear those multipathHealth entires without restarting VDSM?<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Thank you and all the best,<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB">Simone<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-GB"><u></u> <u></u></span></p>
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