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- Initial capital cost
- Optimal implementation requires significant server-side infrastructure, including servers, storage, network and related infrastructure. Also few opportunities of reuse of reusing existing desktop PCs.
- Possible software Software licensing issues
- Some software ISVs have licensing policies not conducive to virtual environments (per CPU, OEM agreements, etc.)
- Performance
- Reliant on reliable and low-latency connectivity to deliver to end client
- Motion graphic-intensive workloads are less suitable
- Under-sized infrastructure can lead to decreased performance for many users simultaneously due to shared, consolidated architecture
- Insufficient support/performance for some desktop peripherals (high-speed storage, graphic-intensive devices)
- Off-line use
- Due to the need for network connectivity to the VM, off-site use where there is little or no network connectivity is not feasible.
Performance and off-line issues are key issues that are actively being targeted by the industry. Upcoming upgrades are intended to help address many of these issues.