Abstract: Systems, methods, and computer products that improve the performance of computer-implemented I/O operations for complex applications, such as a database, that are ported to target computer systems that are not tailored to support the high-performance services that may benefit applications. Complex applications, such as a database, often manage I/O access operations by a caching mechanism that is tailored to the needs of the application. When porting an application to a target computer system that does not support certain I/O access features, I/O performance of the application may be limited. The present invention may be implemented by introducing specialized I/O access features that are tailored to enhance I/O access performance for complex applications, such as a database.

Abstract: A method and data structure that allows a user to view a spreadsheet in a “calculator” mode, wherein certain cells are non-editable. The calculator designer/creator can alter the default as to which cells are editable when the calculator is displayed in the calculator preview mode. Once the designer/creator made all modifications in the calculator preview mode, the user can change the cell values in the calculator mode based on the adjustments made in the calculator preview mode. The invention further allows the user to embed the calculator in any web page, to email a link to the calculator, and to open and save the calculator.

Abstract: A method, apparatus and article of manufacture, implementing the method, processes an error when a write fails in an application that has been ported from a first platform to a second platform. The second platform has a write-to-operator-with-reply call that is not available in the first operating system. The application issues a file write. The application receives an out-of-space error in response to the file write. The application issues a write-to-operator-with-reply call to send a message indicating the out-of-space error to a console.