The multipath report does not have any effects on stability/performance. It is used for creating events to the user in the engine, in order to detect earlier issues in their storage. [1]
In your case, you would have an wrong alarm in the Engine that would not be cleared until next Vdsm restart. [1] https://ovirt.org/develop/release-management/features/storage/multipath-events/#event-reporting On Sun, Mar 11, 2018 at 2:23 PM, Bruckner, Simone < [email protected]> wrote: > Hi Fred, > > > > thank you for the explanation. I restarted VDSM and will monitor the > behaviour. > > > > Does that faulty multipath report have any side effects on stability and > performance? > > > > All the best, > > Oliver > > > > *Von:* Fred Rolland [mailto:[email protected]] > *Gesendet:* Sonntag, 11. März 2018 11:23 > *An:* Bruckner, Simone <[email protected]> > *Cc:* [email protected] > *Betreff:* Re: [ovirt-users] Faulty multipath only cleared with VDSM > restart > > > > Hi Simone, > > 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. > > You can read about the implementation details in [1]. > > It seems that in your scenario, either udev did not sent the needed > clearing events or that Vdsm mishandled them. > > Therefore only restart of the Vdsm will clear the report. > > 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. > > > > Thanks, > > Fred > > > [1] https://ovirt.org/develop/release-management/features/ > storage/multipath-events/ > > > > On Fri, Mar 9, 2018 at 1:07 PM, Bruckner, Simone < > [email protected]> wrote: > > Hi, > > > > after rebooting SAN switches we see faulty multipath entries in VDSM. > > > > Running vdsm-client Host getStats shows multipathHealth entries > > > > "multipathHealth": { > > "3600601603cc04500a2f9cd597080db0e": { > > "valid_paths": 2, > > "failed_paths": [ > > "sdcl", > > "sdde" > > ] > > }, > > … > > > > Running multipath –ll does not show any errors. > > > > After restarting VSDM, the multipathHealth entires from vdsm-client are > empty again. > > > > Is the a way to clear those multipathHealth entires without restarting > VDSM? > > > > Thank you and all the best, > > Simone > > > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.ovirt.org/mailman/listinfo/users > > >
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