Database Under Pressure - Scaling Database Performance Tests in Microsoft Azure Public Cloud.

Making changes in production database or changes in database system configuration often requires these changes to be priorly tested in a test system. This also requires to replay the original workload in the test environment by simulating client's activity on many workstations. In the paper, we show how this task can be realized with the use of many Workload Replay Agents working in Microsoft Azure public cloud. We present model and architecture of widely scalable, cloud-based stress testing environment, called CloudDBMonitor, which allows controlled execution of captured SQL scripts against a specified database in Microsoft SQL Server database management system. The stress testing environment provides the possibility to investigate how the tested database works under a large pressure generated by many simulated clients.