IN-KERNEL CONTENT-AWARE SERVICE DIFFERENTIATION
First Claim
1. A method comprising:
- differentiating at least one service class in a kernel to provide different levels of service for system performance to users to perform service differentiation based on content in at least one data packet, including the steps of;
capturing said at least one data packet until a complete application header is detected;
parsing said complete application header to determine at least one application tag;
matching said at least one application tag to at least one matching rule;
determining a presence of at least one match with said at least one matching rule; and
performing service differentiation action based on said at least one matching rule in order to provide a particular level of service from said different levels of service; and
detecting establishment of a new connection and establishing of a new TCP connection.
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Accused Products
Abstract
The increasing number of Internet users and innovative new services such as e-commerce are placing new demands on Web servers. It is becoming essential for Web servers to provide performance isolation, have fast recovery times, and provide continuous service during overload at least to preferred customers. The invention describes a kernel-based architecture for content-aware service differentiation that protects Web servers against overload by controlling the amount and rate of work entering the system. We have invented a mechanism that provides admission control and service differentiation based on connection and application level information. The application header-based connection control uses application-level information (such as URIs and cookies for HTTP) to define different service differentiation actions. The present invention provides the kernel mechanisms that are more efficient and scalable than application level controls implemented in current Web servers.
15 Citations
23 Claims
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1. A method comprising:
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differentiating at least one service class in a kernel to provide different levels of service for system performance to users to perform service differentiation based on content in at least one data packet, including the steps of;
capturing said at least one data packet until a complete application header is detected;
parsing said complete application header to determine at least one application tag;
matching said at least one application tag to at least one matching rule;
determining a presence of at least one match with said at least one matching rule; and
performing service differentiation action based on said at least one matching rule in order to provide a particular level of service from said different levels of service; and
detecting establishment of a new connection and establishing of a new TCP connection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 18, 19)
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10-11. -11. (canceled)
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14. An apparatus comprising a service differentiation module to provide different levels of service for system performance to users, said module including a tangible computing medium enabling functions of:
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a parser to parse a client Web request;
a classifier to classify the request based on application headers and assigning a request class within a kernel;
a selector to determine an action rule based on the request class;
a performer to apply the action rule based on the request class in order to provide better system performance for higher classed packets and connections; and
a detector to detect establishment of a new connection and establishing of a new TCP connection. - View Dependent Claims (20)
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15. An apparatus comprising a policy agent, said policy agent including:
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a communicator to communicate from a user space to a kernel with an application interface;
an initializer to instantiate service differentiation rules for an application tag within the kernel which include classification and action rules; and
a manager to delete and update rules on a user request. - View Dependent Claims (21)
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16. A method comprising:
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forming a rule, including the steps of;
communicating from a user space to a kernel with an application interface;
instantiating service differentiation rules for an application tag within the kernel which include classification and action rules; and
deleting and adding rules based upon a user request. - View Dependent Claims (17)
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22. An apparatus comprising a computing medium enabling at least one function of:
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means for differentiating at least one service class in a kernel to perform service differentiation based on content in at least one data packet, comprising;
means for capturing said at least one data packet until a complete application header is detected;
means for parsing said complete application header to determine at least one application tag;
means for matching said at least one application tag to at least one matching rule;
means for determining a presence of at least one match with said at least one matching rule; and
means for performing service differentiation action based on said at least one matching rule. - View Dependent Claims (23)
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Specification