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174 results about "Scalable system" patented technology

Scalable system is the system whose performance improves after adding hardware proportional to the capacity added is called scalable system. An algorithm, design, networking protocol, program or other system is sad to scale if it is suitably efficient and practical when applied to large situations.

System and method for locating a closest server in response to a client domain name request

A scalable system and method for locating a closest server in response to a client request via an interactive distribution network, such as the Internet, are provided. A closest content server is defined as having the least round trip time for responding to a client request. The system including a plurality of content servers; and a local server in communication with a plurality of clients, the local server acting as a proxy for communicating client requests from clients to a redirection server. Client network distance and load information is periodically collected at each content server in the network from clients communicating with each of the respective content servers. The redirection server periodically aggregates the network distance and load information from each content server to create client clusters from both current and previously aggregated network distance and load information. Each client cluster represents a division or partition of the total IP address space. Each client cluster is then mapped (paired) to one or more content servers in the network. The mapping or pairing is then utilized to respond to client DN requests received from any client in the network. Another aspect of the invention involves considering the respective capacities of the content servers in the network. A selection probability is assigned to each content server/domain index pair to prevent the repeated selection of the content server having lowest round trip time thereby overloading that server's service capacity. The selection probabilities assigned to each content server effect a load balancing to prevent overloading. Another aspect of the invention involves collecting the distance and load information without incurring any overhead cost by passively collecting TCP information as it is transmitted from clients in communication with content servers in the course of normal communications.
Owner:RPX CORP +1

Method and apparatus for functional architecture of voice-over-IP SIP network border element

In order to provide a single common cost-efficient architecture for real time communication services for audio, video, and data over internet protocol, a voice over internet protocol (VoIP) system and architecture is provided by placing border elements (BEs) at the interface boundaries between the access network the user devices use and the VoIP infrastructure. The BEs use SIP protocol as the access call control protocol over any access networking technologies, for example, IP, Ethernet, ATM, and FR, and provides all services transparently to the end users that use SIP-enabled devices. To enable a scalable system, the SIP BEs are decomposed into separate communicating entities that make the SIP BE scalable and provide new capabilities not previously available by a self-contained SIP BE. Further, multiple levels of decomposition of a SIP BE can be provided by the present invention supporting a flexible and scalable SIP BE design that further improves system efficiencies and cost advantages as compared to use of single integrated border or edge elements. Further, a scalable SIP BE, made up of a plurality of physical entities for optimization of a large scale design, acts as a single integrated functional entity to logically execute a set of functions at the border of a VoIP infrastructure.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Highly scalable system and method of regulating internet traffic to server farm to support (min,max) bandwidth usage-based service level agreements

A highly scalable system and method for supporting (mim,max) based Service Level Agreements (SLA) on outbound bandwidth usage for a plurality of customers whose applications (e.g.,Web sites) are hosted by a server farm that consists of a very large number of servers. The system employs a feedback system that enforces the outbound link bandwidth SLAs by regulating the inbound traffic to a server or server farm. Inbound traffic is admitted to servers using a rate denoted as Rt(i,j), which is the amount of the ith customer's jth type of traffic that can be admitted within a service cycle time to servers which support the ith customer. A centralized device computes Rt(i,j) based on the history of admitted inbound traffic to servers, the history of generated outbound traffic from servers, and the SLAs of various customers. The Rt(i,j) value is then relayed to one or more inbound traffic limiters that regulate the inbound traffic using the rates Rt(i,j) in a given service cycle time. The process of computing and deploying Rt(i,j) values is repeated periodically. In this manner, the system provides a method by which differentiated services can be provided to various types of traffic, the generation of output from a server or a server farm is avoided if that output cannot be delivered to end users, and revenue can be maximized when allocating bandwidth beyond the minimums.
Owner:IBM CORP

Scalable system and method for management and notification of electronic certificate changes

A scalable system for notification of a change in condition of an electronic certificate is provided. The system includes a network of servers capable of providing notification of changes in conditions of electronic certificate to an unlimited number of users. The system includes a first server comprising a detection module and a notification module. The system having at least one server capable of actively monitoring and detecting changes in conditions of a certificate. Other CAP servers in the system may and/or may not actively monitor electronic certificates at the same time. That is, these CAP servers may actively monitor conditions of electronic certificates at the same time they play passive roles (e.g., not monitoring the electronic certificates for which they will be notified of changes from another CAP server). The change in condition that will trigger the notification action of the present invention includes changes to the content of the electronic certificate and/or changes of the status of the electronic certificates including, but not limited to, the revocation of, roll-over of, disablement of, expiration of the electronic certificate. An example of the type of information that the present invention may provide to users includes, but are not limited to, notice that a certificate has expired and an updated electronic certificate. Because the present invention is scalable, an unlimited number of users may be serviced. Further, the various CAP Servers may be configured to monitor specific certificates or types of changes to the certificates, while depending on another CAP Server for monitoring other certificates so as to be more efficient. In fact, one CAP Server may be configured to support notification to a number of users of one company and depend upon other servers to monitor for changes to the conditions of various electronic certificates. The present invention provides many variations in configurations of CAP server-user networks that provides notification services to an unlimited number of users
Owner:MCAFEE INC
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