Abstract: A method for executing a migrated execution context by a storage controller, the method includes: determining, by a management entity, to migrate an execution context from a source computer to the storage controller in response to a fulfillment of a first criterion; and migrating the execution context to the storage controller; wherein the source computer is coupled to the storage controller.

Abstract: A method that can simplify a recovery of a system. The method includes storing multiple types of information, and includes: a first stage of storing information representative of a content of a persistent memory entity at a certain point in time; and a second stage of storing information representative of a state of a virtual machine at the certain point in time; and recovering a system that associates between the first stage of storing information and the second stage of storing information.

Abstract: A method for executing a migrated execution context by a storage controller, the method includes: determining, by a management entity, to migrate an execution context from a source computer to the storage controller in response to a fulfillment of a first criterion; and migrating the execution context to the storage controller; wherein the source computer is coupled to the storage controller.

Abstract: A XML-aware file system exploits attributes encoded in a XML document. The file system presents a dynamic directory structure to the user, and breaks the conventional tight linkage between sets of files and the physical directory structure, thus allowing different users to see files organized in a different fashion. The dynamic structure is based upon content, which is extracted using an inverted index according to attributes and values defined by the XML structure. In one application, a dynamically changing federated repository is searchable using a system of local and merged master indices, wherein query results are presented as virtual directory paths that are semantically organized.

Abstract: A XML-aware file system exploits attributes encoded in a XML document. The file system presents a dynamic directory structure to the user, and breaks the conventional tight linkage between sets of files and the physical directory structure, thus allowing different users to see files organized in a different fashion. The dynamic structure is based upon content, which is extracted using an inverted index according to attributes and values defined by the XML structure. In one application, a dynamically changing federated repository is searchable using a system of local and merged master indices, wherein query results are presented as virtual directory paths that are semantically organized.

Abstract: A group communication system (GCS), for use within a group of clustered computing nodes, provides a flexible group membership model. Flexible group members are defined generally as physical computing entities (such as computing nodes or other devices) or logical computing entities that take part in a distributed application. Such logical entities may include substantially any combination of processes, threads and callback functions. Logical entities that are members in the group may also be objects, such as files, that at least at some times during their existence have no active processes or threads. A single member may include multiple simultaneous processes.

Abstract: A data structure and associated mechanism for implementing object oriented programming language, comprising at least two code blocks for at least one method of an object of a specified class, each of the code blocks containing a different implementation of the at least one method. An access mechanism is provided for accessing a desired code block at run-time on a per object instance basis so as to allow selection of a desired implementation of the at least one method without requiring instantiation of an object of a different class. The selection of which implementation to invoke is integrated into an existing invocation method of the language and is thus transparent to a calling application invoking the method.

Abstract: In a resilient database system which includes a journaled database which is implemented at one or more locations within a distributed data processing system, multiple diverse consistency levels are specified which each detail a level of consistency to be maintained between a primary database and a replica database. A user is then permitted to select a particular level of consistency for each replica database. Thereafter, each update to a record within the primary database is utilized to initiate an update to the corresponding record within each replica database in a manner which is consistent with the selected level of consistency for that replica database.