MapReduce: Simplified Data Processing on Large Clusters MapReduce:面向大型集群的简化数据处理 摘要 MapReduce既是一种编程模型,也是一种与之关联的.用于处理和产生大数据集的实现.用户要特化一个map程序去处理key/value对,并产生中间key/value对的集合,以及一个reduce程序去合并有着相同key的所有中间key/value对.本文指出,许多实际的任务都可以用这种模型来表示. 用这种函数式风格写出的程序自动就…
by Umer Zeeshan Ijaz The purpose of this tutorial is to introduce students to the frequently used tools for NGS analysis as well as giving experience in writing one-liners. Copy the required files to your current directory, change directory (cd) to t…
OpenCascade Chinese Text Rendering eryar@163.com Abstract. OpenCascade uses advanced text rendering powered by FTGL library. The FreeType provides vector text rendering, as a result the text can be rotated and zoomed without quality loss. FreeType al…
How To determineDDIC Check Table, Domain and Get Table Field Text Data For Value? 1.Get Table Field Informatio Function: DDIF_FIELDINFO_GET Input Parameter: Table Name / Field Name /Language 2. GetTable information Function: DDIF_TABL_GET In…
Lifetime-Based Memory Management for Distributed Data Processing Systems (Deca:Decompose and Analyze) 一.分布式数据处理系统像Spark.FLink中的优缺点: 1.优点: in-memory中可以通过缓存中间数据以及在shuffle buffer中组合和聚合数据最小化重复 计算和I/O花销来提升多阶段和迭代计算性能. 2.缺点: (1)会在堆中产生大量的长期生存的对象,因而产生很多GC,尤…
阅读文章:<ICDAR2017 Competition on Reading Chinese Text in the Wild(RCTW-17)> 这篇文章是对一项中文检测和识别比赛项目(RCTW)的介绍和总结,这是一项新的专注于中文识别的竞赛.这项竞赛的特点在于,包含12263张标注过的中文数据集,有两项任务,文本检测以及end-to-end文本识别.竞赛时间从2017年1月20日至3月31日,共收到19个team的23个有效的提交结果.下面从几个方面进行详细说明 . -数据介绍 -任务及评…
http://highlyscalable.wordpress.com/2013/08/20/in-stream-big-data-processing/ Overview In recent years, this idea got a lot of traction and a whole bunch of solutions like Twitter's Storm, Yahoo's S4, Cloudera's Impala, Apache Spark, and Apache Tez…
