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Partitioner分区过程分析
Partition中国人意味着分区,意义的碎片,这个阶段也是整个MapReduce该过程的第三阶段。在Map返回任务,是使key分到通过一定的分区算法。分到固定的区域中。给不同的Reduce做处理,达到负载均衡的目的。他的运行过程事实上就是发生在上篇文章提到的collect的过程阶段,当输...
分类:其他好文   时间:2015-08-21 15:13:13    阅读次数:436
MongDB_find详解
API ????结构: ????????db.collect.find(<criteria>,<projection>); ????参数:????? ? ???? 参数名称 参数类型 参数说明 criteria document 标准 ? 查询条件 projection document ...
分类:数据库   时间:2015-08-19 13:41:14    阅读次数:155
comparator接口与Comparable接口的区别
1. Comparator 和 Comparable 相同的地方 他们都是java的一个接口, 并且是用来对自定义的class比较大小的, 什么是自定义class: 如 public class Person{ String name; int age }. 当我们有这么一个personList,里面包含了person1, person2, persion3....., 我们用Collect...
分类:其他好文   时间:2015-08-18 14:16:57    阅读次数:112
让一个表单根据不同的情况提交给两种不同的方法处理
导航条上面有批量删除(onclick="delall()")和批量下载(onclick="downall()")两个按钮第一种情况:表单里面没有提交按钮(submit)js里面写:delall(){document.form1.action="__APP__/Document/Collect...
分类:其他好文   时间:2015-08-14 09:54:21    阅读次数:107
2015 HUAS Summer Trainning #5~N
DescriptionMany years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as do...
分类:其他好文   时间:2015-08-13 21:40:39    阅读次数:99
hdu 2602
Description Many years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as dog’s , cow’s , also he went to the grave … T...
分类:其他好文   时间:2015-08-13 12:11:33    阅读次数:146
ACM 01背包问题1
DescriptionMany years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as do...
分类:其他好文   时间:2015-08-12 23:27:44    阅读次数:181
精通linux设备驱动开发 笔记
3.2.7 错误处理 #include char * collect_data(char *userbuffer) { char *buffer; /* ... */ buffer = kmalloc(100, GFP_KERNEL); if (!buf...
分类:系统相关   时间:2015-08-11 20:44:20    阅读次数:124
01背包N
DescriptionMany years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man like to collect varies of bones , such as do...
分类:其他好文   时间:2015-08-11 17:51:14    阅读次数:125
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