Distributed Real-Time Transaction Processing

许多现实世界中的应用程序，如机票预订和股票市场，在与地理上分布的大型数据库交互时需要实时响应。在这样的系统中，交易是有最后期限的，但如果错过了最后期限，就不会发生灾难性的事件；但是，延迟完成必须支付罚款(与在4月30日最后期限之后纳税的概念相同)。主要目标是满足最后期限，但对于错过期限的事务，必须将延迟降至最低。例如，典型的要求可能是95%的交易在2秒内完成。在构建大型/昂贵的网络和分布式系统之前，必须设计并测试高效的协议，以展示其在各种条件下的最佳性能。为了经济高效地实现这一点，我们提出了在模拟环境中进行开发和测试的模块化方法。除其他事项外，模拟器应能够模拟低、中、高负载条件。交互式图形用户界面将允许输入参数的组合，以定义各种系统配置和数据可视化。

Many real-world applications such as airline reservations and stock markets require real-time response while interacting with large, geographically distributed, databases. Transactions in such a system have deadlines, but there are no catastrophic events if a deadline is missed; however, a penalty must be paid for late completion (same concept as paying your taxes after the April 30 deadline). The primary goal is to meet the deadlines, but for transactions that miss it, the delay must be minimized. For instance, a typical requirement may be that 95% of transactions complete in less than 2 seconds. Prior to building large/expensive networks and distributed systems, efficient protocols must be designed and tested to demonstrate their optimal performance under a variety of conditions. To do this cost-effectively, we propose a modular approach for development and testing in a simulated environment. Among other things, the simulator should be capable of simulating low, moderate and high load conditions. An interactive graphical user interface would allow a combination of input parameters to define various system configurations and data visualization.