High Latency On DataStore caused by unknown VAAI operation

Products

• VMware vCenter Server

Issue/Introduction

Storage array showed high latency due to a large VAAI copy operation and there is a request to know what the operation was

Environment

ESXi 

Cause

Storage array had high latency due to over utilization of IOPs and or throughput of a VAAI copy operation and there is a request to know what the operation was. 

Resolution

VAAI operations can be related to storage vMotion, snapshots, or a number of other processes that move data. 
These operations can be seen though the vCenter UI task history as per How Do You View vSphere Tasks