Managing web tier session state objects in a content delivery network (CDN)
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United States of America Patent
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Aug 7, 2007
Grant Date -
N/A
app pub date -
Mar 10, 2003
filing date -
Mar 8, 2002
priority date (Note) -
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Abstract
Business applications running on a content delivery network (CDN) having a distributed application framework can create, access and modify state for each client. Over time, a single client may desire to access a given application on different CDN edge servers within the same region and even across different regions. Each time, the application may need to access the latest 'state' of the client even if the state was last modified by an application on a different server. A difficulty arises when a process or a machine that last modified the state dies or is temporarily or permanently unavailable. The present invention provides techniques for migrating session state data across CDN servers in a manner transparent to the user. A distributed application thus can access a latest 'state' of a client even if the state was last modified by an application instance executing on a different CDN server, including a nearby (in-region) or a remote (out-of-region) server.
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