red hat enterprise virtualization performance: specvirt ... - Zift Solutions

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defined for each VM in the tile as shown in the Virtual Configuration section, and multiplying by the number of tiles shown in the Performance Summary). RHEV pricing is based on socket count only, so the cost to license RHEV with 24x7 support for this environment is: $749/socket/year X 4 sockets X 3 years = $8998 The calculated value of $/SPECvirt_sc2010 performance over three years for RHEV for this configuration is therefore: $8998 / 2721 = $3.30/SPECvirt_sc2010 RHEV cost is lowest per SPECvirt_sc2010 performance As you can see in Figure 2, the cost to license RHEV for three years for each of the systems tested in the SPECvirt_sc2010 benchmark is the lowest whether you are looking at 2, 4, or 8 socket systems. The average cost is $2.72/SPECvirt_sc2010. In addition, the costs are clustered in a narrow range of $1.95–$3.84/SPECvirt_sc2010. Figure 2 vSphere 4 cost per performance is higher VMware vSphere 4 is more expensive than RHEV over the three year period, averaging $6.28/SPECvirt_sc2010. That is roughly 2.28 times the cost per SPECvirt_sc2010 of RHEV. This is due to the upfront license fee and the Support and Subscription (SnS). Again, because vSphere 4 pricing only considered sockets used, the cost range is fairly narrow at $4.45– $8.76/SPECvirt_sc2010. www.redhat.com
vSphere 5 cost is highest, more variable, pushes Enterprise Plus With the addition of vRAM licensing, vSphere 5 pricing is now the highest, averaging $17.38/SPECvirt_sc2010, which is 6.38 times the average cost per SPECvirt_sc2010 of RHEV, and an increase of 2.8 times the cost of licensing the previous version vSphere 4. This represents a substantial increase in the cost of the hypervisor. The costs for vSphere 5 are also highly variable, with a low of $10.19/SPECvirt_sc2010 to a high of $35.29/SPECvirt_sc2010. The reason for this increased cost is that you must license the greater of the per-socket cost or the per-vRAM cost. High performance and utilization of virtualization involves many virtual machines with a large amount of vRAM; and in each of these cases the vRAM cost is what needs to be used to determine the cost of the vSphere licensing. In all of these cases, the cost was calculated using the Enterprise Plus Edition of VSphere 5. Why? Although Enterprise Edition is less expensive per socket, it only comes with 64 GB vRAM per license. Enterprise Plus comes with 96 GB of vRAM per license. In these cost calculations, it was actually less expensive to upgrade to Enterprise Plus solely to license the vRAM. The range of costs for vSphere 5 is also more variable than with the socket-based licensing of vSphere 4 and RHEV, because for each of the test systems, virtual machines were tuned for performance, not for vRAM utilization. When only socket count needs to be considered, one can be conservative and give the virtual machines more RAM and allow the hypervisor to manage the memory. Because VMware users now have to pay for vRAM, an additional optimization to minimize the vRAM in each VM may be necessary to lower costs. Time and effort spent on optimizing vRAM may add a hidden cost to your virtualization environment in addition to the higher overall cost of licensing vRAM, and may require trade-offs in either performance or cost. SUMMARY In conclusion, Red Hat Enterprise Virtualization not only offers great performance on the only independent virtualization benchmark, it does so at a great cost/performance ratio especially when you take the vRAM licensing of vSphere 5 into account. WHAT’S NEXT For more information, please go to www.redhat.com/rhev or contact your Red Hat authorized reseller or local Red Hat sales office. www.redhat.com
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Page 3: As shown in Table 2, RHEV also lead

red hat enterprise virtualization performance: specvirt ... - Zift Solutions

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