Essay on Multicasting or Storage Area Networks

Introduction
The business enterprise of today needs to store huge amounts of data related to many business needs, such as customer records, corporate documents, payment records etc and this data needs to be available twenty four hours a day, seven days a week. Many business and commercial organizations also provide on-line transaction capabilities such as for real time credit card operations and hence, the need for data availability, storage and retrieval is even more stringent. Thus, there is a requirement for high data throughput with high levels of reliability, scalability and manageability resulting in a good return on investment for the corporate computer data storage systems. The amounts of data that needs to be stored can run into terabytes and in order to effectively store and retrieve this data, the storage area network or SAN over optical fiber technology has proven to be the most effective modern solution.

The storage area network or SAN solution consists of multiple servers with different operating systems transacting data or talking to multi-vendor storage devices on an optical fiber network through which they are connected. This connectivity makes it possible to use multicasting for required data transfers which involve issuing a simultaneous request for the transfer of data through the fiber-optic network to several devices which may have the required data stored on them. The high rate, at which data can be exchanged over the fiber optic network and the maximum length of the fiber optic connection along with the ability to multicast, makes the SAN solution vastly superior to the traditional method for substantial data storage in the business enterprise which involved the connection of storage devices over the SCSI bus which still remains a viable alternative in spite of its inferior performance......................

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