Total capacity and the number of IOPS are two important factors for a storage platform, but the technology that IT chooses should also fit any budgetary restrictions and match the IT administrator's skill set. The only way to find out is to measure the performance of desktops when actual users are performing their normal day-to-day tasks. The capacity needs also depend on how homogeneous the user base is.Ī typical task worker using an email application and a browser for web-based applications might require only 10-30 IOPS, but someone using the full office suite of applications, graphical design and other business applications may need up to 100 IOPS.
IT cannot simply look up the number of IOPS needed per desktop in a table and then multiply it with the number of desktops. This process starts with understanding all the relevant workloads. Therefore, this step requires long-term planning and an approach that factors future and present business goals.
However, it isn't as easy to change a storage platform based on its fit with an organization's performance profile. Additionally, if a VMware Horizon environment is short on disk space, increasing the total capacity is usually simple. Whatever the VMware clone type, IT admins can follow the relatively simple formula with a predictable total capacity. It also depends on the type of desktops: full clones, which are equal to the size of the original virtual machine, or linked clones and instant clones, which only store the delta per virtual machine. With this formula, Horizon admins should also include the swap space per machine, operational overhead factoring in snapshots and provisioning, and some room for future growth and scale. They should multiply the number of desktops by the number of gigabytes needed per desktop - this will provide a reasonable estimate of the total capacity required.
Capacity planning for virtual storage in VMware HorizonĬapacity planning is usually a relatively easy task for IT admins to handle. When VMware Horizon admins plan for storage, there are two areas they need to cover: capacity planning and performance planning. Proper planning can help provide for a good user experience. Therefore, IT must size the storage platform for those types of workloads. In addition, the VDI-mix for IOPS is different from other workloads - the percentage of writes from Windows virtual desktops is much higher than most server workloads, ranging from 20/80 to 30/70 read-write-ratio. The mix of user types and applications that workers access within a VDI environment, such as VMware Horizon, make resource usage less predictable with VDI.
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