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The Emc Corporation patent solves the following problem:
A typical general-purpose computer including a processor, main memory (for example, semiconductor memory), secondary memory (eg, disk memory) and one or more input / output (I / O) devices (eg, a keyboard, printer, or network interface). Such a computer is entirely appropriate for the situation occasionally computer downtime will cause serious problems (eg, when the computer acts as a server for website advertising, or when the computer used for playing games).
Our analysis of this patent is as follows:
Emc Corporation’s patent US 6526521 B1 deals with Methods and apparatus for providing data storage access.
A technique that provides access to the data storage paths that connect a cluster of nodes in a system of data storage in a way that enables a failover operation that occurs from a first node , boil a second node when the first node suffer the way degradation forcing the first node to operate significantly slower than in the past, even when the first node baton access the system data storage by one or more in the way of data storage. Such a failover operation from a humiliating first node to a second node allows the cluster as a whole to continue to do the operation at a rate greater than that given to the humiliating first node. In one arrangement, a cluster of nodes linking data storage systems with many organizations in the way of data storage. A cluster framework and a set of paths resource agents operate on cluster nodes. In particular, an individual part of the building cluster and an individual way of resource agents operate in each node. The way resources agents receive, from building cluster, the instructions for controlling the path sets and, in response, determine which of course sets available for moving data between the cluster nodes and data storage systems according the predetermined conditions access. The way resources agent then give to the building cluster, saying operations to identify which of course sets are available for moving data between the cluster nodes and data storage system according to a prescribed road access conditions. The cluster building access ways sets base state operations.
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