Home > Storage > PowerStore > Virtualization and Cloud > VMware Horizon 8 with Dell EMC PowerEdge R6525 Servers and Dell EMC PowerStore 9000 > Heavy writes
VDI environments are typically heavily write-based. After a VM is booted and the user logs in and begins work tasks, most of the I/O traffic consists of changes from the VM. The traffic consists of file changes, swap file writes, memory paging, and updates to user preferences.
During the steady state phase, the write ratio is typically 70% or higher. VDI has a higher write ratio than most other workloads. This write-heavy traffic pattern means that VDI is a more demanding application for a storage array to support. The test results show that the PowerStore 9000T model appliance is well suited to provide optimal performance for demanding heavy-write VDI workloads.