Question about VM total disk latency

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Re: Question about VM total disk latency

Veeam Logoby Shestakov » Thu Mar 17, 2016 5:40 pm

I believe it`s an independent bug, since there is Veeam One v9 logic flaw for this particular alarm.
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Re: Question about VM total disk latency

Veeam Logoby sonic23 » Wed Oct 05, 2016 2:29 pm

Hi Nikita,

I also noticed this alert showing up so much in our environment and happened onl when we upgraded to VeeamOne v9. Is there a fix on this? I watched the VMs on esxtop using 2 seconds sampling and though there are times that latency went over the threshold it comes back right away. I changed it to 30 minutes from the default 15, still getting it..then tried to change the threshold to 1 hour just to test but still happening. Is there a bug on v9?

Thanks.
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Re: Question about VM total disk latency

Veeam Logoby Shestakov » Wed Oct 05, 2016 3:25 pm

Hi,
there was a bug with alarm notification frequency as you can read above.
Regarding the alarm trigger, if you doubt the alarm works correctly, please check Datastore Latency graph in Veeam ONE Monitor.
Thanks!
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Re: Question about VM total disk latency

Veeam Logoby sonic23 » Wed Oct 05, 2016 3:32 pm

Aside from checking the datastore latency in VeeamOne monitor, when will this bug be fixed?

Thanks.
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Re: Question about VM total disk latency

Veeam Logoby Shestakov » Wed Oct 05, 2016 3:51 pm

As far as I know it`s already fixed in the most recent version. What version are you at?
Do you experience the behavior when time period in alarm rule is 1 hour but alarms are still triggered every 15 minutes?
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Re: Question about VM total disk latency

Veeam Logoby sonic23 » Wed Oct 05, 2016 4:04 pm

That's weird. In VeeamOne7 we didn't have an issue like that, just happened when straight upgrade to v9. I applied also Update1 which version is 9.0.0.2088. The issue is why an alarm is getting triggered when the latency was not over the threshold in 15 minutes. Correct me if I'm wrong, my understanding is that if the latency goes over the threshold for steady 15 minutes the alarm will be triggered.
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Re: Question about VM total disk latency

Veeam Logoby Shestakov » Wed Oct 05, 2016 4:16 pm

sonic23 wrote:my understanding is that if the latency goes over the threshold for steady 15 minutes the alarm will be triggered

You are correct. That should work with no issues.

We are discussing 2 separate things:
1. Fairness of the alarm triggering
2. Frequency of the alarm triggering

The mentioned bug is related to the triggering frequency, while it there was no bug about its fairness.
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Re: Question about VM total disk latency

Veeam Logoby sonic23 » Tue Oct 11, 2016 5:26 pm

I have an alarm a while back, the alarm was triggered at 1:07 from one of the VM which is not being used that much, the Write latency was 122ms and just a spike and it went to almost 0ms until now. I thought the alarm will be triggered if the latency is steady above 75 ms but in this case its not. I'm not expecting an alarm but we did get it, this is the same scenario I noticed for the whole environment.
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Re: Question about VM total disk latency

Veeam Logoby Shestakov » Tue Oct 11, 2016 11:53 pm

Well, if had spike of 122ms, there is a probability average values was above the threshold =75 ms for 15 minutes. You can check it in Veeam ONE Monitor or Custom Performance Data report. To make sure Veeam ONE shoes correct results you can double check it with vSphere client.
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