Microsoft Technology Licensing, LLC

Lewis S Bruck

Michael James Zwilling

Sameet Harishanker Agarwal

Kangrong Yan

Tao Di

Ranjani Ramamurthy

Shriram Lakshmi

In a method for testing a system, the technology initially accesses a database having a plurality of stand-alone pieces-of-code. Each piece-of-code includes a sequence of operations to be performed on a system. One or more of a plurality of stand-alone pieces-of-code within a database are selected to generate a set of at least two stand-alone pieces-of-code, based on a testing scenario. A variable test sequence from a set of at least two stand-alone pieces-of-code is then generated. The variable test sequence is then utilized to test a system based on a testing scenario.

Method for testing a system

A database view of a database is created which provides a transaction-consistent view of an existing database at a previous time. Each database view contains all the information needed to, along with the primary database, determine the contents of the primary database at a previous time. The database view consists of a side file corresponding to each data file in the primary database. The side files contain a copy of all data from the corresponding data file which has been changed since the database view was created. Sparse files may be used for the side files in order to conserve space. Page table data is kept in order to allow a quick determination as to whether the page from the primary database has been modified and the old version stored in the database view side file.

Transaction consistent copy-on-write database

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Lewis S Bruck