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[链接]1.1.1 结构化文本文件 结构化文本的格式比较规范,即每行一条数据,列之间用分隔符区分。SPL 可用 import/export 函数读写结构化文本。 比如:ordersNT.txt ..
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SPL(Structured Process Language) 是专业数据计算引擎 esProc 所用的程序语言,SPL 中固化了大量结构化数据运算类库,使用 SPL 编写数据计算处理代码要 ..
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[链接]后记 本书共 60 节,讲述了几十种结构化大数据的基础高性能算法或存储方案。我们已经在较多实际场景灵活应用过这些方法,使用 SPL 实现的算法,和传统关系数据库上的 SQL 相比,经常 ..
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[链接] [链接]9.7 多作业负载均衡 和单机上的多线程并行类似,第一节中讲述的多机并行框架也会等待最慢的分机返回结果后才会继续。我们可以尽量使分机计算的数据量更均衡,但并不能保证各分机执行 ..
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