Home > Blogs > VMware VROOM! Blog > Tag Archives: WhatIf

Tag Archives: WhatIf

What-If? Resource Management with vSphere DRS

vSphere Distributed Resource Scheduler (DRS) provides a simple and easy way to manage your cluster resources. DRS works well, out of the box for most vSphere installations.

For cases where more flexibility is desired in how the cluster is managed, DRS provides many options in the form of cluster rules, settings and advanced options.

Often the impact of using rules in a DRS cluster is not very well understood. The settings and advanced options are not very well documented. Imagine if it was possible to play around with rules in your cluster before actually applying them, or changing the DRS migration threshold in your cluster without changing the setting in your live cluster – and yet, be able to visualize the impact of those actions in your cluster?

Introducing – DRS Dump Insight – to help with simple queries regarding DRS behavior, like the following.

  • What if I dropped all the affinity rules in my cluster?
  • What if I set cluster advanced option “AggressiveCPUActive”?
  • What if I changed the DRS migration threshold from 3 to 5?

Continue reading