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Active IQ Unified Manager Alert: High Node Utilization Fragmentation

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Category:
oncommand-unified-manager
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Applies to

  • OnCommand Unified Manager (OCUM)
  • Active IQ Unified Manager (AIQUM)
  • ONTAP 9
  • Clustered ONTAP 8.3

Note: 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 fragmentation warning 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.

 

 

 

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