Available IOPS

[wyahn1219]

Hello
Can Harvest and Garafana check the Available IOPS counter like in Unified Manager?

[rahulguptajss]

@wyahn1219 Harvest captures IOPS and many more metrics like latency, amount of data transferred etc. See the volume dashboard screenshot in Harvest.

[wyahn1219]

@rahulguptajss

The dashboard does not show information about available IOPS.

https://docs.netapp.com/us-en/active-iq-unified-manager-97/performance-checker/concept-what-available-iops-is.html
Is there any way to view this information?

[rahulguptajss]

Thanks @wyahn1219 . I believe these are headroom counters. Harvest provides headroom dashboard that displays this information.

[wyahn1219]

Thank you for your answer.
I see very low available IOPS even though I rarely use aggr.
is this right?

headroom_aggr_optimal_point_ops{datacenter="$Datacenter",cluster="$Cluster",aggr="$OptimalPointAggr"} - headroom_aggr_current_ops{datacenter="$Datacenter",cluster="$Cluster",aggr="$OptimalPointAggr"}

[rahulguptajss]

Are you seeing it where confidence_factor is over 1? There was a similar problem reported in issue #1625.

headroom_aggr_optimal_point_confidence_factor{datacenter="$Datacenter",cluster="$Cluster"} > 1

[wyahn1219]

No I don't see

[rahulguptajss]

Could you check #1625? It contains specific information indicating that the calculation for Available Ops is only performed when the value of headroom_aggr_optimal_point_confidence_factor exceeds 1. Are you suggesting that even when the confidence factor is above 1, the reported available ops values are incorrect in dashboard?

[wyahn1219]

um.. what is headroom_aggr_optimal_point_confidence_factor ?
What do I need to do to make this return 1?

[rahulguptajss]

For more detailed information regarding this topic, you can refer to the following resource: Is my controller overloaded?. According to my understanding, this is calculated on ONTAP side. However, I don't have specific knowledge about how exactly this calculation is carried out in ONTAP.

[rahulguptajss]

Please refer here for Zapi/Rest mapping for this counter https://netapp.github.io/harvest/23.05/ontap-metrics/#headroom_aggr_optimal_point_confidence_factor

[wyahn1219]

Oops sorry your already provide #1625.
Thank you for your kindly help.