International Business Machines Corporation

Other

Joel Mark Yarborough

Robert Brian Hutchison

John Christian Fluke

Mark Gregory McClanahan

Joseph Martin Herbst

An application (e.g., a computer program) prints data by invoking a print function with a format argument and, optionally, at least one data argument. The format argument and any data arguments are saved in a deferred trace data buffer. The print function returns to the application then, sometime after the print function has returned, the deferred trace data buffer is processed and the format argument and/or any data arguments are printed. By saving the format argument and any data argument(s) to a memory buffer instead of parsing and formatting the arguments in real-time, program efficiency may be improved and the impact of the print function on a software test scenario may be reduced.

Methods, systems, and computer program products for deferred computer program tracing

Methods, systems and computer program products for storing data that use a rolling window file that maintains a defined file size while sequentially replacing an oldest portion of previously stored data with new data are provided. The rolling window file operates without the use of a wrap buffer implemented through manipulation of a current offset pointer by moving a first storage region in a sequentially linked plurality of storage regions associated with the rolling window file to become the new last (or end of file) storage region associated with the file. Newly received data may then be stored in the newly designated end of file storage region. Operations moving the first region in the linked sequence to the last position can repeat theoretically indefinitely as new data is received. Accordingly, a fixed file length saving only the most recent data may be provided without ever reallocating the regions, such as clusters of data under a file access table type file systems, that are originally associated with the rolling window file.

Methods, systems and computer program products for storing data using a rolling window file

Methods, systems and computer program products are provided which access files which are mirrored between at least a first storage device and a second storage device by determining if an access of the first storage device is by a process for mirroring files between the first storage device and the second storage device and assuming a privileged user level for the process for mirroring files so that the access to the first storage device is performed at the privileged user level if the access is by the process for mirroring files. By assuming a privileged user level, the process for mirroring files may have access to the files to mirror, preferably, irrespective of the permissions assigned to a file by the owner of a file.

Methods, system and computer program products for mirrored file access through assuming a privileged user level

Methods, systems and computer program products are provided which assure access to files which are mirrored between at least a first storage device and a second storage device by controlling access to the first and second storage devices so that owners of files which are to be mirrored between the first and the second storage devices are within a common user group. A predefined set of permissions are established for the common user group and permissions of members of the common user group are forced to the predefined set of permissions. Thus, files and directories owned by members of the common user group will be forced to have the permissions of the common user group. Files and directories owned by members of the common user group are mirrored between the first and the second storage devices.

Methods, systems and computer program products for mirrored file access through forced permissions

A method and system in a data processing system are disclosed for the dedication of memory storage locations. The data processing system includes a kernel space for executing software in kernel mode and a user space for executing software in user mode. An interface is established residing in the kernel space for interfacing between the kernel mode and the user mode. A determination is made that an application residing in user space is accessing the interface. In response to the application accessing the interface, a portion of main memory is dedicated for use by the application. The portion of main memory is used only by the application. In this manner, the application has dedicated the portion of main memory from user space.

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Raleigh, NC, United States of America

Joel Mark Yarborough