Abstract: Techniques, systems, apparatus and computer-program products are disclosed for developing a web-hosted shared database system with improved user interface and reduced programming. In one aspect, using a web application development framework includes declaratively specifying a web application's pages using page configurations. The framework can automatically coordinate page state with the state of a database server and an applications server, so that the specified page is first rendered and then one or more portions of the page can be updated in response to a server data change, Also, programs that are executed when a request is issued are declaratively specified using program configurations. Either or both of the page configurations and the program configurations can be implemented by access to a unified application state virtual database.

Abstract: Techniques, apparatuses, and systems for application design and application data flow analysis. Techniques, apparatuses, and systems can include providing a design interface to create an application with different user groups and access rights, the design interface operable to specify an action to include to a page of the application, where the action, when invoked, modifies the application state; receiving an action specification that describes an access rights modification that results from an invocation of the action during an execution of the application, where the access rights modification indicates an enabling or disabling of one or more access rights of a user; and generating application specification queries and commands to enforce access rights based on the access rights modification.

Abstract: A distributed system with transaction support may have a transaction component and one or more data components. The transaction component may manage a transaction using a log sequence number for each operation, and then transmit operations to one or more data components with log sequence numbers. The data components may perform the data operations in an idempotent manner and return a reply. The transaction component may then write the operation, its log sequence number, and information from the reply message to its log. The transaction component is able to commit a transaction, as well as retry or undo portions of a transaction, by using the information stored on its log. This may be possible even when a single transaction uses multiple data components, which may be located on different devices or manage separate and independent data sources.

Abstract: In general, a technique or mechanism is provided to efficiently transfer data of a distributed file system to a parallel database management system using an algorithm that avoids or reduces sending of blocks of files across computer nodes on which the parallel database management system is implemented.

Abstract: A distributed system with transaction support may have a transaction component and one or more data components. The transaction component may manage a transaction using a log sequence number for each operation, and then transmit operations to one or more data components with log sequence numbers. The data components may perform the data operations in an idempotent manner and return a reply. The transaction component may then write the operation, its log sequence number, and information from the reply message to its log. The transaction component is able to commit a transaction, as well as retry or undo portions of a transaction, by using the information stored on its log. This may be possible even when a single transaction uses multiple data components, which may be located on different devices or manage separate and independent data sources.

Abstract: Techniques, systems, apparatus and computer-program products are disclosed for developing a web-hosted shared database system with improved user interface and reduced programming. In one aspect, using a web application development framework includes declaratively specifying a web application's pages using page configurations. The framework can automatically coordinate page state with the state of a database server and an applications server, so that the specified page is first rendered and then one or more portions of the page can be updated in response to a server data change, Also, programs that are executed when a request is issued are declaratively specified using program configurations. Either or both of the page configurations and the program configurations can be implemented by access to a unified application state virtual database.

Abstract: Techniques, apparatuses, and systems for application design and application data flow analysis. Techniques, apparatuses, and systems can include providing a design interface to create an application with different user groups and access rights, the design interface operable to specify an action to include to a page of the application, where the action, when invoked, modifies the application state; receiving an action specification that describes an access rights modification that results from an invocation of the action during an execution of the application, where the access rights modification indicates an enabling or disabling of one or more access rights of a user; and generating application specification queries and commands to enforce access rights based on the access rights modification.