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Fig. 12. Memory utilization (30 users).

Figure 12 Memory utilization (30 users).

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Fig. 2. (a) Type | Hypervisor, and (b) Type 2 Hypervisor [7].
Fig. 2. (a) Type | Hypervisor, and (b) Type 2 Hypervisor [7].
Fig. 1. Hypervisor and VDI structure [5].
Fig. 1. Hypervisor and VDI structure [5].
TABLE I. Hardware specification of control domain server and infrastructure server.
TABLE I. Hardware specification of control domain server and infrastructure server.
Fig. 3. Conceptual diagram of Citrix XenDesktop [16].
Fig. 3. Conceptual diagram of Citrix XenDesktop [16].
Fig. 4. Conceptual diagram of Login VSI and components and Citrix XenDesktop [9].
Fig. 4. Conceptual diagram of Login VSI and components and Citrix XenDesktop [9].
Fig. 5. Average response time of Citrix XenDesktop and Citrix XenServer (20 users).
Fig. 5. Average response time of Citrix XenDesktop and Citrix XenServer (20 users).
Fig. 6. Average response time of Citrix XenDesktop and Citrix XenServer (30 users).
Fig. 6. Average response time of Citrix XenDesktop and Citrix XenServer (30 users).
Fig. 8. Average response time for different transactions (30 users).
Fig. 8. Average response time for different transactions (30 users).
Fig. 9. Average response time for CPU transaction (20 users).
Fig. 9. Average response time for CPU transaction (20 users).
Fig. 11. Memory utilization (20 users). where, & is the maximum error with one degree of confi- dence (a) using two tail distribution (Student ¢ distribution),
Fig. 11. Memory utilization (20 users). where, & is the maximum error with one degree of confi- dence (a) using two tail distribution (Student ¢ distribution),
Fig. 10. Average response time for CPU transaction (30 users).
Fig. 10. Average response time for CPU transaction (30 users).
Fig. 14. Confidence Interval for different workloads (20 users). 8 is the standard deviation, and n is the number of samples. It is clear that all CIs levels are overlapped and the means are also overlapped in each other. This is an indication that the performance of the system did not degrade for both workloads. In addition, increasing the number of active users from 20 to 30 will not affect the average response time. So, we can conclude that the average response time of Citric XenDesktop VDI with Citrix XenServer hypervisor is statistically same even when changing the workload from medium to heavy. Furthermore, the increment in number of active users from 20
Fig. 14. Confidence Interval for different workloads (20 users). 8 is the standard deviation, and n is the number of samples. It is clear that all CIs levels are overlapped and the means are also overlapped in each other. This is an indication that the performance of the system did not degrade for both workloads. In addition, increasing the number of active users from 20 to 30 will not affect the average response time. So, we can conclude that the average response time of Citric XenDesktop VDI with Citrix XenServer hypervisor is statistically same even when changing the workload from medium to heavy. Furthermore, the increment in number of active users from 20
Fig. 13. Confidence Interval for different workloads (20 users).
Fig. 13. Confidence Interval for different workloads (20 users).
Fig. 15. Confidence Interval for different workloads (20 and 30 users).
Fig. 15. Confidence Interval for different workloads (20 and 30 users).
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