Applying bandwidth and throughput cap for a scsi virtual disk of a virtual machine.

Products

• VMware vSphere ESXi

Issue/Introduction

Certian high IO work loads may require capping of scsi virtual IO bandwidth and througput. 

Environment

VMware vSphere ESXi 6.x

VMware vSphere ESXi 7.x

VMware vSphere ESXi 8.x

Resolution

1. Power off the Virtual machine 
2. Add the below parameters in the virtual machine configuration file .vmx. 

sched.scsix:x.throughputCap = <Number of IOPS>
sched.scsix:x.bandwidthCap = <Bandwidth in MBps>

Note: scsix:x is the scsi adapter and port ID where the scsi disk connected to, and need the values to be set for.