בתאריך יום ה׳, 13 באפר׳ 2017, 16:03, מאת Chris Adams <[email protected]>:
> Once upon a time, Yaniv Kaul <[email protected]> said: > > On Tue, Apr 11, 2017 at 3:57 PM, Chris Adams <[email protected]> wrote: > > > I've been getting an occasional message like: > > > > > > Storage domain hosted_storage experienced a high latency of > > > 5.26121 seconds from host node3. > > > > > > I'm not sure what is causing them though. I look at my storage > > > (EqualLogic iSCSI SAN) and storage network switches and don't see any > > > issues. > > > > > > When the above message was logged, node3 was not hosting the engine > > > (doesn't even have engine HA installed), nor was it the SPM, so why > > > would it have even been accessing the hosted_storage domain? > > > > > > > All hosts are monitoring their access to all storage domains in the data > > center. > > Okay. Is there any more information about what this message actually > means though? Is it read latency, write latency, a particular VM, etc.? > > I can't find any issue at the network or SAN level, nor any load events > that correlate with the times oVirt logs the latency messages. > Ovirt is reading 4k from the metadata special volume every 10 secods. If the read takes more than 5 seconds, you will see this warning in engine event log. Maybe your storage or the host was overloaded at that time (e.g. vm backup)? Nir -- > Chris Adams <[email protected]> > _______________________________________________ > Users mailing list > [email protected] > http://lists.ovirt.org/mailman/listinfo/users >
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