Tandem has re-written its SQL compiler and its query execution engine into a new product that will be available on multiple operating systems. The new product uses a novel query execution engine and the authors highlight the unique aspects of the new engine. ServerWare SQL uses a data flow and scheduler driven task model to execute queries. Tasks communicate either via in-memory queues or via interprocess communication. Partitioned, pipelined, or independent operations are executed in parallel. By adding new task types the model can be easily extended. Parallelism in a distributed memory environment is implemented as a special "exchange" task type, as in the Volcano research prototype. Scheduling and load balancing are performed by separate scheduler tasks.
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机译:Tandem已将其SQL编译器及其查询执行引擎重新编写到多个操作系统上可用的新产品中。新产品使用新产品的查询执行引擎,作者突出了新引擎的独特方面。 Serverware SQL使用数据流和调度程序驱动的任务模型来执行查询。任务通过内存队列或通过进程间通信进行通信。分区,流水线或独立操作并行执行。通过添加新的任务类型,可以轻松扩展模型。分布式内存环境中的并行性被实现为特殊的“Exchange”任务类型,如Volcano Research Prototype中。调度和负载均衡由单独的调度程序任务执行。
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