Active IQ Unified Manager Alert: Node Disk Fragmentation Warning Threshold Breached
Applies to
- OnCommand Unified Manager (OCUM)
- Active IQ Unified Manager (AIQUM)
- ONTAP 9
- SnapMirror
Notes:
- OnCommand Unified Manager has been rebranded to Active IQ Unified Manager as of the 9.6RC1 (and later) releases
- For the purposes of this document, Unified Manager will be referred to as ActiveIQ Unified Manager (AIQUM)
Issue
- Active IQ Unified Manager reports
node disk fragmentationwarning alerts in the volumes in the cluster - However, performing a reallocate measure displays a very low fragmentation (level 1 or 2).
Example:
From: "Active IQ Unified Manager" <aiqum@company.com>
Date: Jul 4, 2017 6:01 AM
Subject: Performance Alert - 1 new warning system-defined threshold(s) breached on Cluster cluster1
To: "Storage Admins" <storageadmins@company.com>
Warning System-defined Threshold Event
________________________________________
Summary
Trigger Time: 5:39 am, 4 Jul EDT
Description: 1 new warning system-defined threshold(s) breached on Cluster cluster1
________________________________________
p-sdt-cluster1-nod-1212
Policy Name: Node disk fragmentation
A WARNING event has been triggered on node1 based on the detection of high node utilization caused by high
percentage of delayed disk write on node1_aggr_sas1.