Today, online transaction processing applications can downsize from mainframes to microprocessors. Commodity database systems, operating systems, and hardware came of age in 1993 - they surpassed the online transaction processing performance of proprietary solutions. There are lingering doubts about downsizing batch transaction processing applications. The doubts center on the ability of microprocessor hardware to handle the high IO bandwidth required by batch processing, and on doubts that microprocessor systems offer the software services and utilities key to batch processing applications. This paper reviews the impressive progress of made by commodity software and hardware in processing OLTP workloads.
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