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Merging multiple heterogeneous file systems into a single virtual unified file system

The present invention is a virtual unified file system designed to be implemented on multiple operating systems and comprised of multiple sub-file systems. The virtual unified file system presents to the user space of the operating system on which it is implemented a virtual unified file structure incorporating the file structure of each integrated sub-file system. The virtual unified file system includes a universal protocol, converter modules and unify module. The universal protocol includes file system operations common to all existing file system while allowing for an arbitrary number of extensions and exceptions. The converter modules provide for conversion between specific protocols native to specific file system and the universal protocol. The unify unit processes universal protocol command calls and present a virtual unified file structure to the user space that is implementing the virtual unified file system. In presenting a virtual unified file structure to the user space, the virtual unified file system provides for resolution of file name and file data path conflicts. In distributing data across multiple integrated sub-file system, the virtual unified file system provides for run-timer and off-line methods for distributing files.
Owner:TIGER TECH OOD

Software performance and management system

A system providing precise determination of resource use within a software system such as a database system. A user, such as a database administrator, operates a user interface to select and analyze portions of an application for resource use. In one embodiment in a DB2 database system individual SQL statement resource use can be determined. The invention is capable of uniquely identifying even dynamic SQL statements (i.e., Equalized I.D). Prediction information is presented for when a query, or other database task, will end based on selectable parameters such as optimizer cost, estimated cardinality, and delta delivery rates of data. A user can create or select event monitors to acquire statistical data on a database task. The results of activating the event monitor are presented to the user such that the user can progressively examine portions of an application, package, section and even individual statements. The user interface allows a user to efficiently and precisely identify processing shortcomings so that the performance of a database task can be improved. The interface also allows a user to sort, or otherwise organize, the statistical data so that analysis of the data is improved and maximum value is derived from the SQL cost evaluated data.
Owner:DATABASE GUYS INC +1
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