Abstract: A method, system and computer program product are disclosed for recovery in a virtualized environment using remote direct memory access (RDMA). In one embodiment, the method comprises operating a virtual computer system on a physical computer system, and the virtual system maintains in a memory area a record of a state of the virtual system. In this method, when defined error conditions occur on the virtual system, RDMA is used to pull the record of the state of the virtual system from that memory area onto a standby computer. This record on the standby computer is used to re-initialize the virtual computer. Embodiments of the invention provide methods that provide a very fast recovery from a virtual machine fault or error, while requiring much fewer resources than standard approaches. In embodiments of the invention, one spare real computer system can be used for backing up several virtual systems.

Abstract: A system for conducting memory transactions includes a non-volatile main memory and a memory buffer including a plurality of cache lines. Each of the cache lines includes content and one or more bits signifying whether a memory transaction corresponding to the content of the cache line has been performed to completion and whether the content of the cache line matches content of a corresponding location of the non-volatile main memory. When the one or more bits of a cache line of the plurality of cache lines signifies that the transaction has been performed to completion and the content of the cache line does not match the content of the corresponding location of the non-volatile memory, access to modify the content of the cache line is restricted until the content of the cache line is written to the corresponding location of the non-volatile main memory.

Abstract: A method, system and computer program product are disclosed for recovery in a virtualized environment using remote direct memory access (RDMA). In one embodiment, the method comprises operating a virtual computer system on a physical computer system, and the virtual system maintains in a memory area a record of a state of the virtual system. In this method, when defined error conditions occur on the virtual system, RDMA is used to pull the record of the state of the virtual system from that memory area onto a standby computer. This record on the standby computer is used to re-initialize the virtual computer. Embodiments of the invention provide methods that provide a very fast recovery from a virtual machine fault or error, while requiring much fewer resources than standard approaches. In embodiments of the invention, one spare real computer system can be used for backing up several virtual systems.

Abstract: A method for conducting memory transactions includes receiving a transaction. The steps of the received transaction are performed in a memory buffer. A state of the memory buffer cache lines is set as pending and unstored while the transaction is in progress. After all steps have been successfully performed, the state of the memory buffer cache lines are changed to complete and unstored. When it is determined that the memory buffer cache lines are to be written to the non-volatile main memory, the contents is written to the non-volatile main memory. The state of the memory buffer cache lines are then changed to complete and stored. When the memory buffer cache lines are in the complete and unstored state, access to modify their content is restricted.

Abstract: A system for conducting memory transactions includes a non-volatile main memory and a memory buffer including a plurality of cache lines. Each of the cache lines includes content and one or more bits signifying whether a memory transaction corresponding to the content of the cache line has been performed to completion and whether the content of the cache line matches content of a corresponding location of the non-volatile main memory. When the one or more bits of a cache line of the plurality of cache lines signifies that the transaction has been performed to completion and the content of the cache line does not match the content of the corresponding location of the non-volatile memory, access to modify the content of the cache line is restricted until the content of the cache line is written to the corresponding location of the non-volatile main memory.

Abstract: A method for configuring a large hybrid memory subsystem having a large cache size in a computing system where one or more performance metrics of the computing system are expressed as an explicit function of configuration parameters of the memory subsystem and workload parameters of the memory subsystem. The computing system hosts applications that utilize the memory subsystem, and the performance metrics cover the use of the memory subsystem by the applications. A performance goal containing values for the performance metric is identified for the computing system. These values for the performance metrics are used in the explicit function of performance metrics, configuration parameters and workload parameters to calculate values for the configuration parameters that achieve the identified performance goal. The calculated values of the configuration parameters are implemented in the memory subsystem.

Abstract: One or more embodiments manage emergency response services. An emergency event is determined to have occurred. A set of civilian responders currently available to respond to the emergency event is selected from a plurality of civilian responders in response to determining that the emergency event has occurred. Each civilian responder in the set of civilian responders is associated with at least one wireless communication device. The set of civilian responders is notified that the emergency event has occurred. A set of emergency event information associated with the emergency event is transmitted to at least one wireless communication device associated with each civilian responder in the set of civilian responders.

Abstract: A method for configuring a large hybrid memory subsystem having a large cache size in a computing system where one or more performance metrics of the computing system are expressed as an explicit function of configuration parameters of the memory subsystem and workload parameters of the memory subsystem. The computing system hosts applications that utilize the memory subsystem, and the performance metrics cover the use of the memory subsystem by the applications. A performance goal containing values for the performance metric is identified for the computing system. These values for the performance metrics are used in the explicit function of performance metrics, configuration parameters and workload parameters to calculate values for the configuration parameters that achieve the identified performance goal. The calculated values of the configuration parameters are implemented in the memory subsystem.

Abstract: One or more embodiments manage emergency response services. An emergency event is determined to have occurred. A set of civilian responders currently available to respond to the emergency event is selected from a plurality of civilian responders in response to determining that the emergency event has occurred. Each civilian responder in the set of civilian responders is associated with at least one wireless communication device. The set of civilian responders is notified that the emergency event has occurred. A set of emergency event information associated with the emergency event is transmitted to at least one wireless communication device associated with each civilian responder in the set of civilian responders.

Abstract: A method for configuring a large hybrid memory subsystem having a large cache size in a computing system where one or more performance metrics of the computing system are expressed as an explicit function of configuration parameters of the memory subsystem and workload parameters of the memory subsystem. The computing system hosts applications that utilize the memory subsystem, and the performance metrics cover the use of the memory subsystem by the applications. A performance goal containing values for the performance metric is identified for the computing system. These values for the performance metrics are used in the explicit function of performance metrics, configuration parameters and workload parameters to calculate values for the configuration parameters that achieve the identified performance goal. The calculated values of the configuration parameters are implemented in the memory subsystem.

Abstract: The invention provides methods and apparatus for establishing a connection between a mobile client and an external computer network such that the client computer network connection provides the illusion of seamless connectivity. In one aspect of the invention data is processed in a wireless communication network and is received from a access point at a gateway to an external computer network. Access points are disposed in the vicinity of the path of the mobile client. In another aspect of the invention data is processed in a wireless communication network and is received at an onboard proxy from an access point. The data is then transmitted to a mobile client.

Abstract: In datacenter environments, many copies of servicing components (application servers, http servers, etc) are used to handle larger loads. In these cases, incoming service requests typically go to a load balancer to be directed to the appropriate servicing component. Modern advances in technology, like the Server/Application State Protocol, have allowed load balancers to receive recommendations in the form of numerical weights to describe the best distribution for the incoming requests. The present invention provides a method for computing path oriented statistics that enable load balancing algorithms to transparently integrate downstream performance and resource usage statistics into load balancing weights.

Abstract: In datacenter environments, many copies of servicing components (application servers, http servers, etc) are used to handle larger loads. In these cases, incoming service requests typically go to a load balancer to be directed to the appropriate servicing component. Modern advances in technology, like the Server/Application State Protocol, have allowed load balancers to receive recommendations in the form of numerical weights to describe the best distribution for the incoming requests. The present invention provides a method for computing path oriented statistics that enable load balancing algorithms to transparently integrate downstream performance and resource usage statistics into load balancing weights.

Abstract: An apparatus and method for distributing traffic across a group of machines using application instance statistics. In order to perform load balancing in accordance with the present invention, a method of generating weights to bias load balancing distributions is provided. The application instances to which traffic is being distributed, or the application middleware, are instrumented to establish certain metrics about the application while running. The application instance instrumentation will provide application statistics such as number of successful transactions, application response times, application topology, importance of transactions being processed, time the application is blocked waiting for resources, resource consumption data, and the like. These metrics are collected, processed, and then presented as a set of weights to the load balancing apparatus to govern its distribution of traffic.

Abstract: The invention provides methods and apparatus for establishing a connection between a mobile client and an external computer network such that the client computer network connection provides the illusion of seamless connectivity. In one aspect of the invention data is processed in a wireless communication network and is received from a access point at a gateway to an external computer network. Access points are disposed in the vicinity of the path of the mobile client. In another aspect of the invention data is processed in a wireless communication network and is received at an onboard proxy from an access point. The data is then transmitted to a mobile client.

Abstract: A method for version negotiation between two entities is provided. Described in the context of communication protocol negotiation, an initiating entity proposes an initial communication protocol version to a receiving entity. In response, the receiving entity accepts the protocol version if it is within the range of its supported versions or proposes an alternative protocol version selecting to be either the highest or lowest protocol version supported by the receiving entity. This allows the receiving entity to successfully limit the number of protocol versions it supports and to communicate this restriction in any protocol setting to the initiating entity. The initiating entity then accepts the proposed alternative protocol version. If version negotiation is successful, either the accepted initial version or the accepted alternative version of the communication protocol is used for the duration of the communication session between the initiating entity and the receiving entity.

Abstract: In datacenter environments, many copies of servicing components (application servers, http servers, etc) are used to handle larger loads. In these cases, incoming service requests typically go to a load balancer to be directed to the appropriate servicing component. Modern advances in technology, like the Server/Application State Protocol, have allowed load balancers to receive recommendations in the form of numerical weights to describe the best distribution for the incoming requests. The present invention provides a method for computing path oriented statistics that enable load balancing algorithms to transparently integrate downstream performance and resource usage statistics into load balancing weights.

Abstract: Techniques for globally managing systems are provided. One or more measurable effects of at least one hypothetical action to achieve a management goal are determined at a first system manager. The one or more measurable effects are sent from the first system manager to a second system manager. At the second system manager, one or more procedural actions to achieve the management goal are determined in response to the one or more received measurable effects. The one or more procedural actions are executed to achieve the management goal.

Abstract: The invention provides methods and apparatus for establishing a connection between a mobile client and an external computer network such that the client computer network connection provides the illusion of seamless connectivity. In one aspect of the invention data is processed in a wireless communication network and is received from a access point at a gateway to an external computer network. Access points are disposed in the vicinity of the path of the mobile client. In another aspect of the invention data is processed in a wireless communication network and is received at an onboard proxy from an access point. The data is then transmitted to a mobile client.

Abstract: In datacenter environments, many copies of servicing components (application servers, http servers, etc) are used to handle larger loads. In these cases, incoming service requests typically go to a load balancer to be directed to the appropriate servicing component. Modern advances in technology, like the Server/Application State Protocol, have allowed load balancers to receive recommendations in the form of numerical weights to describe the best distribution for the incoming requests. The present invention provides a method for computing path oriented statistics that enable load balancing algorithms to transparently integrate downstream performance and resource usage statistics into load balancing weights.