International Business Machines Corporation

Jeffrey Ch Liu

Hao-Ting Shih

Chih-Wen Su

Ying-Kai Wang

Johnson Ys Chiang

Ivan Nestlerode

Joey Hy Tseng

Johnson Ys Chang

David Ward

Neal J Alewine

Ta-wei Lin

Chun-Fei Chang

Giant H M Tu

Giant Tu

Xavier A Vasques

Lin Chan Hsiao

Shu-Hao Liang

A first reverse proxy appliance of the plurality of reverse proxy appliances receives an incoming transaction. A machine logic determines that the incoming transaction cannot be directly processed by the first reverse proxy appliance based, at least in part, upon the current threshold level of the first reverse proxy appliance and the current transaction count of the first reverse proxy appliance. Responsive to the determination that the incoming transaction cannot be directly processed by the first reverse proxy appliance, a second reverse proxy appliance of the plurality of reverse proxy appliances and a third reverse proxy appliance of the plurality of reverse proxy appliances negotiate in order to determine that the third reverse proxy appliance will process the incoming transaction. Responsive to the negotiating, the incoming transaction is sent to the third reverse proxy appliance.

Processing incoming transactions based on resource utilization status of backend systems in an appliance cluster

A third party automatically participates in a peer-to-peer communication session established between a first endpoint and a second endpoint. Once the peer-to-peer communication session is established, a third party receives a first user data provided by the first endpoint, and verifies the first user data. If the verification succeeds, the third party automatically participates in the peer-to-peer communication session.

Participating in a peer-to-peer communication session

A method, system, and/or computer program product synchronizes Service Level Monitoring (SLM) statuses of a plurality of appliances in a cluster. A token, which comprises a global SLM data and loading distribution information, is received at a first appliance. The global SLM data and loading distribution information of the token is retrieved from the token. The token is updated with local statistics for the first appliance. The updated token is then passed to a next appliance.

Synchronizing SLM statuses of a plurality of appliances in a cluster

A computer program product and apparatus measure performance of an information appliance. The computer program product comprises code for: a test module receiving, from a client, and recording a request for processing of a sample data by an information appliance. The test module sends the sample data received from the client to the information appliance for processing. If a request to a backend application is present, the test module also sends the request to the backend application for processing and receives and records a response from the backend application. The test module sends the response from the backend application to the information appliance for processing. A generated correlation ID is used to update a performance data table with start time and a stop time of a response for transaction sample data processed by the information appliance.

Measuring performance of an appliance

A method dynamically adjusts a log level of a transaction. The method includes: buffering the most detailed logs of a transaction having highest log level into a memory; checking if all dependency-defined transactions within a dependency list/tree for the transaction are completed; and, in response to the completion of all dependency-defined transactions within the dependency list/tree for the transaction, obtaining a log filter level for the transaction in association with the transaction results (success/failure) of dependency-defined transactions, wherein the log filter level is a new log level for the transaction.

Dynamically adjusting a log level of a transaction

A computer system and program product dynamically adjusts a log level of a transaction by: buffering the most detailed logs of a transaction having highest log level into a memory; checking if all dependency-defined transactions within a dependency list/tree for the transaction are completed; and, in response to the completion of all dependency-defined transactions within the dependency list/tree for the transaction, obtaining a log filter level for the transaction in association with the transaction results (success/failure) of dependency-defined transactions, wherein the log filter level is a new log level for the transaction.

A method routes data to an appliance in a high-availability active/active appliance cluster. Messages received by appliances are assigned by a self-balancing module to balance a load of appliances in the appliance cluster, which includes a persistent storing standby group and a transaction processing standby group. Persistent storing data, which is generated by processing the messages, are stored in a virtual persistent storage, which provides an interface between a persistent storage of a primary database appliance and an application for processing the messages. The virtual persistent storage is linked to the persistent storage of the primary database appliance in response to an appliance that receives the messages not being the primary database appliance, thereby sending persistent storing data to the persistent storage of the primary database appliance.

Providing high availability in an active/active appliance cluster

A system and computer program product for performing failover in a redundancy group, where the redundancy group comprises a plurality of routers including an active router and a standby router, the failover being characterized by zero black hole or significantly reduced black hole conditions versus a conventional failover system. The system comprises a processing unit connected to the memory and adapted to execute the plurality of instructions, which cause an information appliance to: receive an incoming message at a switch; send a request of identification to the plurality of routers to identify a current active router, where the current active router represents a virtual router of the redundancy group; and in response to receiving a reply containing an identification from the current active router within a predetermined time, forward the incoming message to the current active router.

Performing failover in a redundancy group

A method, system, and computer program product for performing failover in a redundancy group, where the redundancy group comprises a plurality of routers including an active router and a standby router, the failover being characterized by zero black hole or significantly reduced black hole conditions versus a conventional failover system. The method comprises the steps of: receiving an incoming message at a switch; sending a request of identification to the plurality of routers to identify a current active router, where the current active router represents a virtual router of the redundancy group; and in response to receiving a reply containing an identification from the current active router within a predetermined time, forwarding the incoming message to the current active router.

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Taipei, Taiwan

Jeffrey Ch Liu