International Business Machines Corporation

James William Stopyro

Steven Jay Munroe

John Gerard Nistler

William Thomas Newport

Rohit Dilip Kelapure

Matthew J Sykes

Junjie Cai

Maynard Paul Johnson

Alan Jay Wecker

Alexander Krits

Hany A Salem

Charles James Redlin

Scott Alan Plaetzer

Francis Gerard Malin

Roman Vitenberg

A system and method that performs retrofitting and autowiring of service bindings by generating a plurality of retrofitted references from a plurality of resource references and autowiring the plurality of retrofitted references into an application. The system and method deploys the application to an environment in response to the autowiring of the plurality of retrofitted references.

Autowiring location agnostic services into application software

An apparatus utilizes distributed coordinating members to distribute member-specific state data to subscribing members in a distributed computing system. Member-specific state data is associated with different subjects, and coordinating members are configured to manage state data associated with particular subjects such that a reporting member that needs to report member-specific state data associated with a particular subject forwards that state data to a coordinating member associated with that subject. Once received, the coordinating member then distributes the member-specific state data to any members that have subscribed to receive state data associated with that subject.

Subscription-based management and distribution of member-specific state data in a distributed computing system

An apparatus, program product and method utilize distributed coordinating members to distribute member-specific state data to subscribing members in a distributed computing system. Member-specific state data is associated with different subjects, and coordinating members are configured to manage state data associated with particular subjects such that a reporting member that needs to report member-specific state data associated with a particular subject forwards that state data to a coordinating member associated with that subject. Once received, the coordinating member then distributes the member-specific state data to any members that have subscribed to receive state data associated with that subject.

Methods and systems are provided in a group communication system for dynamically changing a version of a group communication protocol from a first version to a second version transparently to external sources and destinations. The system accommodates newly joining members that can only support versions of the protocol other than the version currently in use without interruption in service. Similarly, the system can upgrade its operating version of the group communication protocol to improve performance when a member having relatively low capabilities exits the group.

Protocol negotiation for a group communication system

A method, apparatus, system, and signal-bearing medium that in an embodiment determine whether to log an exception based on whether the exception has already occurred. In an embodiment, exceptions that repeatedly occur at the same source and location within the source are logged on the first occurrence, and not logged thereafter. In this way, data can be saved about the exception, yet system resources are not consumed by repeated logging.

Logging of exception data

A multi-tasking computer operating system allocates a respective virtual address space to each task. A portion of virtual address space is reserved as a shared address space (SAS) region, the SAS region occupying the same range of virtual addresses in the virtual address space of each task. Certain classes of data intended for sharing among multiple tasks are assigned unique and persistent addresses in the range of the shared address space region. Preferably, certain facilities are added to a conventional base operating system to support the SAS region and associated function. These include a join facility for initiating a task to the SAS region, an attach facility for attaching blocks of memory within the SAS region, and a paging facility for retrieving a page within the SAS region from storage. In this manner, it is possible for a multi-tasking multiple virtual address space computer system to assume the advantages of a single level store computer system when performing certain tasks.

Computer system having shared address space among multiple virtual address spaces

A preferred embodiment of the present invention provides an intelligent reference object (IRO), which is used to encapsulate address translation between shared address space (SAS) addresses and native system addresses. The IRO works with a shared persistent virtual storage system that provides address translation between SAS addresses and the underlying system. By encapsulating these addresses translations in an IRO, the preferred embodiment provides the ability to create and share persistent objects using single level store semantics. When a client accesses the data in a persistent object, the IRO corresponding to the persistent object provides any address translation and indirection needed to perform the access.

Method and apparatus for encapsulating address translation for shared persistent virtual storage

The preferred embodiment of the present invention facilitates the creation, storage and interaction of persistent objects using single level storage semantics on commodity systems. Specifically, the present invention defines several objects used to implement persistent objects in a shared address space. The preferred embodiment includes a Class Encapsulator class and the Object Encapsulator class that are preferably designed to encapsulate the class data and instance data, respectively. In particular, a Class Encapsulator object would preferably be created in a Persistent Container for each class of objects loaded into that Persistent Container. The Class Encapsulator object would include all of the specific data needed to implement its corresponding class. Likewise, an Object Encapsulator object would preferably be created to encapsulate each object to be stored persistently in the shared address space. A Persistent Handle class is preferably defined to store the shared address space address of the Class Encapsulator object and the Object Encapsulator object.

Virtual machine implementation for shared persistent objects

The preferred embodiment of the present invention facilitates the creation, storage and interaction of persistent objects using single level storage semantics on commodity systems. The preferred method and apparatus utilize a persistence mechanism to provide object persistence. In particular, the persistence mechanism defines a Factory class, a Finder class, an ExpandingContainer class, a Container class and a ClassLoader class which work together to create persistent shared objects. An application can create persistent objects by calling methods on the Factory class. The Factory class then works in conjunction with an instance of the Container class and the ClassLoader class to create persistent objects in a shared address space (SAS). Shared address space is a persistent virtual address space shared by all processes running on a computer system. The SAS allows the processes to access data within SAS at any time, using a SAS address.

System and method for storage of shared persistent objects

The preferred embodiment present invention provides a shared persistent virtual storage system and method for creating and managing a large logical virtual address space, called a shared address space (SAS), on existing systems. The shared persistent virtual storage system provides an interface layer between client processes using the SAS addresses and the underlying system. By providing the ability to use a large shared address space, the preferred embodiment allows the creation and sharing of persistent objects using single level store semantics. The preferred embodiment does this by mapping the shared address space to backing store as needed, and by implicitly moving portions of data, called pages, between backing storage and main memory as needed by client process. The preferred embodiment then provides a mechanism for translating shared address space addresses into a native address of the data in the page cache and providing that address to the application. Thus, the preferred embodiment provides the ability to store data using proven single level storage techniques in commodity systems that use smaller native addressing. This data can then be easily shared between client processes using the shared address space addresses.

Growing community of inventors

Rochester, MN, United States of America

James William Stopyro