An apparatus and method provide persistent data during a user session on a networked computer system. A global data cache is divided into three sections: trusted, protected, and unprotected. An authorization mechanism stores and retrieves authorization data from the trusted section of the global data store. A common session manager stores and retrieves data from the protected and unprotected sections of the global data cache. Using the authorization mechanism, software applications may verify that a user is authorized without prompting the user for authorization information. Using the common session manager, software applications may store and retrieve data to and from the global data store, allowing the sharing of data during a user session. After the user session terminates, the data in the global data cache corresponding to the user session is invalidated.

 
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> Synchronization of selected data from snapshots stored on different storage volumes

> Dynamic fragment mapping

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