文件名称：降低计划外宕机的解决方案-VMware虚拟化解决方案
文件大小：5.97MB
文件格式：PPT
更新时间：2024-05-12 13:35:57
VMware
降低计划外宕机的解决方案 集群 支持第三方冗余软件 支持在同一个物理机或跨物理机的虚拟机集群 内置硬件冗余功能 支持冗余的网络和存储连接 用虚拟机冗余系统非常容易 Key Points: Redundancy is easier and more cost-effective to implement with VMware because of built-in redundancy features like network card teaming and HBA multi-pathing (ESX Server) as well as the ability to share redundant components between workloads on a single system VMware server virtualization enables clustering options like virtual-virtual and virtual-physical through third-party clustering products like Veritas Cluster Server and MSCS (Microsoft Cluster Service) Script: First let’s look at a couple of ways that virtual infrastructure helps in reducing unplanned downtime. Redundant components and redundant systems are frequently used to provide a way to maintain availability in spite of the failure of a hardware or software component. Without VMware virtualization, the need to purchase duplicate components or duplicate systems in order to create redundancy makes this an expensive solution. In some cases additional software is also needed to support failover to the redundant system or component. Virtual infrastructure makes redundancy much more practical to implement. Most significantly, you can share redundant elements across workloads—now multiple virtual machines can share a set of redundant NIC’s, for example, reducing the cost and complexity of redundancy. Also, virtual machines have the built-in redundancy support that you expect to find in the best systems. This includes built-in support for NIC teaming, for multi-pathing, and for multi-path failover. Finally, the ability to easily create new virtual machines without needing new hardware makes using redundant servers much easier to justify from both a cost and complexity point of view. Another way that virtual infrastructure helps to reduce unplanned downtime is by providing new options for clustering. Using third-party clustering software, virtual machines can be clustered with physical machines or with other virtual machines. - Physical to virtual clustering: Protects against hardware and software failures Reduces cost: several different physical machines can fail-over to a virtual machines running on fewer physical servers Increases flexibility: fail-over to heterogeneous machines is possible because of virtualization - Virtual to virtual clustering: You can create a “cluster-in-a-box” to protect against software failures without needing to buy extra failover server hardware, or you can use such a configuration to test cluster configurations before deploying them on other servers. You can also cluster virtual machines across boxes, gaining the maximum flexibility while protecting yourself against both hardware and software failures. Because both primary and fail-over servers are virtualized, the cost of clustering is reduced since the redundant hardware can support several applications.