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, 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.

Abstract: Systems, methods, and computer program products for improving the performance of computer-implemented I/O operations for complex applications, such as databases. Applications that are ported to the IBM OS/390 UNIX System Services may be enhanced by the present invention to improve I/O performance. That is, the present invention may be implemented by augmenting general-purpose I/O access features with specialized I/O access operations that are tailored to enhance I/O access performance for complex applications, such as databasbes, on the IBM OS/390 UNIX System Services.

Abstract: Systems, methods, and computer products that improve the performance of computer-implemented I/O operations issued by complex applications that are directed to high-performance disk drives, and that may operate in conjunction with the product marketed under the trademark IBM S/390®. Such high-performance disk drives may include the IBM Shark® that supports the parallel access volumes feature.

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: 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: There is provided a method for enhancing source code for execution on a computer platform that has a capability to employ a memory file. The method includes the steps of recognizing an occurrence of a first instruction in the source code that does not utilize the capability, and supplementing the source code with a second instruction that utilizes the capability.

Abstract: Systems, methods, and computer products that improve the performance of computer-implemented I/O operations issued by complex applications that are directed to high-performance disk drives, and that may operate in conjunction with the product marketed under the trademark IBM S/390®. Such high-performance disk drives may include the IBM Shark® that supports the parallel access volumes feature.

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: Systems, methods, and computer program products for improving the performance of computer-implemented I/O operations for complex applications, such as databases. Applications that are ported to the IBM OS/390 UNIX System Services may be enhanced by the present invention to improve I/O performance. That is, the present invention may be implemented by augmenting general-purpose I/O access features with specialized I/O access operations that are tailored to enhance I/O access performance for complex applications, such as databasbes, on the IBM OS/390 UNIX System Services.