Understand the functional components of the vFlash architecture in VMware vSphere 6.
- [Voiceover] In this video, I'll explain the architecture…of vFlash, we'll cover the host and cluster requirements,…and talk about vFlash configuration maximums.…Vflash is vMotion-compatible, but that being said,…there's some important considerations…that you should bear in mind.…Here we see a diagram including four ESXi hosts,…and we have two virtual machines running on these hosts,…VM1 and VM2.…Both of these virtual machines have VMDKs…that have been configured with vFlash.…A VMDK can have up to 400 gigabytes of data…in the vFlash Read Cache.…
This is a lot of data to move over the vMotion network,…and so vMotion operations may take much longer than normal.…When you do migrate a virtual machine using vMotion,…you can choose whether or not…to migrate the contents of the Read Cache.…If you do migrate the contents,…the vMotion will be much slower.…If you decide to drop the contents of the Read Cache,…the vMotion will be faster, but the Read Cache…will be empty on the destination host.…Over time, the cache will rebuild.…
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