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APPARATUS AND METHOD FOR INSTANT COPY OF DATA IN A DYNAMICALLY CHANGEABLE VIRTUAL MAPPING ENVIRONMENT
APPARATUS AND METHOD FOR INSTANT COPY OF DATA IN A DYNAMICALLY CHANGEABLE VIRTUAL MAPPING ENVIRONMENT
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机译:在动态可变的虚拟映射环境中即时复制数据的装置和方法
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摘要
A system is provided to support dynamically changeable virtual mapping schemes in a data processing system. The present invention separates processing of data unit requirements from the selection of which storage subsystems to use for storage by using a storage methodologies inventory. A stored data management subsystem contains one or more hosts. A plurality of data storage elements is functionally coupled to the one or more hosts. The plurality of data storage elements is organized using a plurality of layers of mapping tables. The plurality of layers of mapping tables provides unique identification of location of the data such that individual data entries in a mapping table is variable and self-defining with respect to the amount of data managed. In addition, the present system provides various instant copy mechanisms for copying data upon receiving a write operation to either a source or copy data. The instant copy mechanisms may be selected based on the type of mapping originally used to store the data that is to be copied.
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