On Friday VMware released to the community a video demonstrating how the new Storage I/O Control (SIOC) feature, part of the upcoming vSphere 4.1, works.
SIOC provides the capability to define quality of service prioritization for the I/O activity on a single host or a cluster of hosts.
The prioritization, which can be enable or disable on specific datastores, is enforced through shares and limits.
The ESX/ESXi hosts monitors the latency in communication with the datastore of choice. As soon such latency exceeds a defined threshold the datastore is considered congested.
At that point all VMs accessing that datastore are prioritized according to their defined shares.
The administrator can even define the amount of I/O operations per second (IOPS) that each virtual machine can reach.
The video shows SIOC in action and is really worth checking out!
This article’s content was primarily sourced from Yellow Bricks!
