Understand the impact of creating a resource reservation on a resource pool in VMware vSphere 6 and use cases.
- [Voiceover] In this video I'll explain…the impact of assigning Reservations to Resource Pools.…Resource Pools allow us to configure resource settings…that apply to child objects…such as virtual machines in child pools.…We can configure shares, limits and Reservations…on a Resource pool.…And reservations are the most complex…of these three resource controls.…They can become especially tricky when dealing with…parent and child Resource Pool hierarchies.…Child objects with Reservations…draw upon the resouces of the parent pool.…
This means that if you create a child object…with a Reservation,…the parent pool must also have a Reservation…with sufficient capacity to satisfy the child object.…Let's take a look at an example Resource Pool…with a memory reservation.…Here we see our root Resource Pool.…It's a stand alone ESXi host…equipped with 48 gigabytes of memory.…We've created a Resource Pool…with a 16 gigabyte memory reservation.…This behaves just like a virtual machine with a Reservation.…
16 gigabytes of physical memory on the ESXi Host…
VMware Certified Instructor Rick Crisci provides an overview of vSphere resource controls—shares, limits, and reservations—and their impact on performance and VSWP file size. Rick explains exactly what happens when virtual machines compete for resources, the role of swap files, and how resource controls help automate allocation.
In chapter 2, Rick shows how to manage performance with resource pools, including child pools. He explains the impact a reservation has on resource pools, and includes a demo on creating and configuring a resource pool. Chapter 3 is an overview of the vFlash architecture for leveraging SSD resources. Watch this chapter to learn how to configure vFlash reservations and to assign a reservation to a VM.
Note: This course maps to the Administer and Manage vSphere 6.x Resources domain of the vSphere Certified Professional 6—Data Center Virtualization (VCP6DCV) exam.
- Allocating memory and CPU
- Using ESXTOP
- Configuring reservations, limits, and shares
- Managing performance with resource pools
- Creating child and tiered resource pools
- Leveraging SSD resources with vFlash