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prolix21
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VM total disk latency alarm after vmotion

Post by prolix21 » Dec 21, 2017 5:48 pm

A pattern we're starting to notice in Veeam One is that some (not all) vms seem to be triggering VM total disk latency warnings/errors when they're vmotioning between hosts. Is this normal?

I've not noticed this in the past, but I'm not sure I've really been looking either. Trigger after a vmotion, then clear shortly after.

Checked the ESXi hosts and none of them report any sort of volume/disk/whatever io issues, which usually accompany the Veeam alarms.

Shestakov
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Re: VM total disk latency alarm after vmotion

Post by Shestakov » Dec 22, 2017 3:48 pm

Hello dan,
Do you mean that each time vMotion moves VM to another host, "disk latency" alarm is triggered?
What Veeam ONE/vSphere version are you at?
Thanks!

Vitaliy S.
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Re: VM total disk latency alarm after vmotion

Post by Vitaliy S. » Dec 24, 2017 11:46 am

Latency might be expected whenever you trigger the datastore related operation. Can you compare performance chart in vSphere Client and the alarm values triggered by Veeam ONE?

prolix21
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Re: VM total disk latency alarm after vmotion

Post by prolix21 » Dec 26, 2017 2:47 pm

Shestakov wrote:Hello dan,
Do you mean that each time vMotion moves VM to another host, "disk latency" alarm is triggered?
What Veeam ONE/vSphere version are you at?
Thanks!
Correct, when VMs move host to host (not storage vmotion, just automated DRS events we see disk latency alarms in Veeam ONE

Vsphere 6.5 u1, Veeam One 9.5, latest build

Shestakov
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Re: VM total disk latency alarm after vmotion

Post by Shestakov » Dec 28, 2017 11:36 am

Got it. And what about the performance graphs in the vSphere Client at that time (Vitaly's question above)?
Probably once disk latency is above vMotion threshold it's also above Veeam ONE alarm's threshold so naturally the alarm triggers when VM is moved to another host/datastore.

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