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In the world of server virtualization software, VMware vSphere is a proven de facto standard. It offers high scalability and performance, along with superior overall management capabilities. VMware vSphere also supports more operating systems than its competitors which means that it is the most flexible virtualization solution. NEC, with a long-standing partnership with VMware and extensive experience with its software, offers the latest VMware vSphere 4 solutions. VMware vSphere 4 provides a leading edge virtualization environment with higher reliability and more features than its predecessors.
VMware vSphere enables servers to scale up hardware. It can also allocate a total amount of memory to virtual servers which exceeds available physical memory and maximize memory utilization between multiple virtual servers. This means that resources can be used more efficiently than in a physical environment.
VMware vSphere monitors operating conditions and automatically adjusts how resources are allocated to virtual servers. For example, if the load on a virtual server increases, live migration (VMotion) automatically migrates the virtual server to a physical server with additional resources to improve performance thus enhancing availability and providing stress-free services for users (VMware DRS). In addition, if there are physical servers with low loads, virtual servers are migrated and consolidated onto fewer servers. Physical servers that are no longer running virtual servers are powered off (VMWare DPM). These advanced resource management functions minimize power consumption, resulting in lower TCO .
VMware VMotion can migrate a running virtual server from one physical server to another without shutting it down. This means that you can maintain hardware without having to schedule downtime as you would if using only physical servers. With VMware VMotion, the end-user business does not have to be disrupted.
In addition, VMware HA monitors ESX servers and virtual servers for failures. If there is a hardware failure, resources are automatically failed over to a different ESX server, thus providing high availability.
VMware vSphere supports more than 50 operating systems and more than 300 enterprise applications. It can achieve performance results equivalent to a physical environment. The number of supported software vendors increases every day. Thus VMware vSphere offers extremely versatile choices.
With rich experience in supporting VMware products, NEC offers comprehensive support for your virtualization architecture.
NEC offers recommended configurations that are set up in advance.
These configurations enable smooth deployment of VMware vSphere, even if you have never virtualized servers before.
NEC Express5800 and NEC Storage product lines offer many VMware-certified products.
VMware HA is a high-availability function that automatically reboots resources. For mission-critical tasks such as databases, NEC recommends higher availability solutions using clustering software such as ExpressCluster.
VMotion is used for continuous operations during planned maintenance but cannot recover the system from failures by itself. To use VMotion for failure recovery, it must be used in combination with management tools as NEC SigmaSystemCenter which detects signs of failures.
Because virtualization makes it easy to add servers, the number of guest operating systems can increase rapidly. Therefore, there are cases where users find themselves using more instances of Windows than they are licensed to deploy. By using an unlimited Windows license for virtual servers, you no longer have to worry about license violations or additional costs.
It is wise to size systems appropriately for cost effective virtualization solutions. When sizing, take into account the capacity required for operations such as migration among servers in case of hardware failure, overlapping peak loads on consolidated servers, as well as future expansion plans.
