The use of cluster design software "heartbeat" to detect application or server failure. In the event of server failure, it will automatically ownership of resources from the failed server to the activities of the server. Note that there are ways to maintain a heartbeat connection higher availability, such as in the case of complete breakdown site. MSCS does not require any special client software installed on your computer, so the user experience in disaster recovery depends on the client - server application in the client side of nature. Reconnect the customer is often transparent, because the same IP address in MSCS to restart applications, file sharing and so on. Further, to disaster recovery, clustering of nodes can be in isolated, remote locations. SQL Server 2000 can be configured for up to 4 nodes in the cluster, and SQL Server 2005 can be configured for up to 8 node clusters. When a SQL Server instance is configured to the cluster later, its disk resources, IP address and service groups to form a cluster to achieve disaster recovery. SQL Server 2000 allows install on a cluster of 16 instances. According to the online help, "SQL Server 2005 on a server or processor can support up to 50 instances of SQL Server," but "only the hard drive using the 25 characters, so if you need more examples, you need to plan ahead . "
The facts may not be so simple. Since we have not been able to contact the relevant person in charge of the software to Morning Glory, it is difficult to clearly understand the true Zarva software ideas, but by some of the companys strategic planning for public release, the same can be some analysis. Zarva software for it, whether the full range of agency Guanqunjinchen of products and solutions, depending on the companys own development strategy and corporate positioning. If it is a mere distributors, agents more clearly the product of their own development, the better. But Zarva software and not to position itself as a mere distributor, but to play a "resource integrator" role. In other words, Zarva also give software partners to provide solutions, the program may be constituted by a number of vendors, Zarva software will need to integrate their own products, rather than to the upstream vendors product line organization their own programs. The release of its own brand product, Zarva software made it clear that, "As the Morning Glory is not a manufacturer, products can only be a proposal on the proxy does not change the right of the right, so if the agent can not fully meet user needs products, or manufacturers Zarva solution strategy and direction of the expansion of conflict, the Morning Glory will not be able to provide users with a better solution, so decided to launch Zarva free brand products, directly involved in the network security market. "