Free SAN and storage performance and capacity monitoring

ONTAP v9 bug

There is a problem with ONTAP v9 firmware which however might not affect all v9 instances.
Storage firmware reporting very high utilization peaks randomly for different volumes/aggregates/port etc.
When we detect such data then we through away whle data collection what result in data gaps in graphs.

You can see similar messages in storage error log (logs/error.log-):
ERROR Thu Mar 22 14:40:11 2017 Bad NetApp data detected! Collection ignored... SUBSYS: aggregate  NAME: Netapp01  METRIC: read_data  VALUE: 17084398071KB
It is a confirmed NetApp bug 1091745.
As per last information NetApp not going to fix it!!! No idea why.

There is nothing else we can do.
NetApp native tools for perf monitoring are not affected as they use other interface.
We have choosen this interface as it was only the way which did not require admin access for getting perf data at time we have wrote implemented it.

We are going to implement other method to get performance data from NetApp.
It is going to be release at the end of Q3 2018.

Note this bug appears only on minor number of NetApp C-mode storages, 7-mode does not seem to be affected at all.