Determine whether not a vSphere 6 Virtual Machine will be able to boot up based on the reservations of a pool.
- [Voiceover] Now that we have and understanding…of resource pools and expandable reservations,…let's take a look at some examples…that will help tie all these concepts together.…In our first example, let's take a look…at a resource pool without…an expandable memory reservation.…So, here we see our root resource pool…and it's a standalone ESXi Host…equipped with 48 gigabytes of memory.…We've created a resource pool…with a 16 gigabyte memory reservation.…16 gigabytes of memory on the ESXi Host…is now reserved for this pool.…
And, it can't be used by any other virtual machines…or resource pools.…And, we see that the root resource pool…now has 32 gigabytes of memory that remains…and can be reserved by other objects.…As we create child objects within this resource pool,…we can configure reservations.…For example, we could boot up four virtual machines…each with memory reservations.…And, in this case, these VMs would consume…all by two gigabytes of the memory…that the parent pool has reserved.…
We now try to boot up a fifth virtual machine…
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