I haven't seen a significant adoption of tiers consisting of memory flash and solid-state drive flash. But I do...
think simultaneous usage of multiple flash types will increase, especially for virtualization hosts.
The primary goal for any virtualization administrator is to ensure the performance of virtual machines (VMs). Traditionally, this has meant provisioning the VM with plenty of physical RAM and using flash storage. However, mixed flash has the potential to further improve VM performance.
One factor that can affect VM performance is the Windows pagefile within the guest OS. Pagefile originated at a time when physical RAM was expensive, and even today it is used to make up for shortages in physical RAM.
Because paging involves committing memory pages to disk storage, it can greatly affect the performance of VMs. For physical servers, admins have long tried to provision the server with enough physical memory to minimize paging. This approach isn't always practical for VMs because committing large amounts of RAM to a VM decreases the VM density of the host. As such, virtualization admins have often tried to move the pagefile to an isolated storage location where it will not interfere with regular storage I/O.
More recently, memory channel flash has emerged as a good option for VM OS paging. Some organizations have had success using memory flash as a small VMware data store exclusively for guest OS paging. The virtual hard disks and other VM components continue to reside on a flash array as usual. This approach can improve overall VM performance by greatly enhancing the speed of guest OS paging operations without committing excessive RAM to the VM.
How flash storage impacts VM performance
Your hypervisor, and not storage, might be causing slow VM performance
Dig Deeper on All-flash arrays
Related Q&A from Brien Posey
Over or underprovisioning resources for virtual desktops can leave a VDI deployment in rough shape. With a few tips, IT pros can make sure they make ... Continue Reading
Disk-based backup provides newer features that can speed and ease recovery. IT should take advantage of instant recovery and virtual lab capabilities. Continue Reading
There are some instances where IT should manually upgrade to Windows 10, including when the desktop runs older software for which IT does not have ... Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.