Otherwise, the system management staff required to operate a large-scale system can become too large and hence too costly. There is no way to control how many users log in at the same time or which transactions they may choose to access. The system must be able to scale up predictably and inexpensively to handle Internet loads of millions of potential users.For a retail customer, it should identify relevant discounts and advertisements and offer products customized to that user. The system should be able to personalize each user's on-line experience based on past usage patterns.Other times, distributed processing is used to meet technical requirements, such as efficiency, incremental scalability, and resistance to failures (using backup systems). Sometimes, this is due to a legal requirement that the system must operate in the country where the business is performed. Often, this implies that the system itself is distributed, with machines at multiple locations. The system must be able to operate well in a geographically distributed environment.This is often a legal requirement, as in financial transactions. Records of transactions, once completed, must be permanent and authoritative.Systems that run transactions are often " mission critical " to the business activity they support. When an electronic commerce (e-commerce) web site stops working, the retail enterprise is closed for business. ![]() When a business grows, it must increase its capacity for running transactions, preferably by making an incremental purchase - not by replacing its current machine by a bigger one or, worse yet, by rebuilding the application to handle the increased workload.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |