Connection test failed. Listener refused the connection with the following error: ORA-12505, TNS:listener does not currently know of SID given in conn...
分类:
Web程序 时间:
2014-06-25 23:48:58
阅读次数:
387
这一章我们探索了Spark作业的运行过程,但是没把整个过程描绘出来,好,跟着我走吧,let you know!我们先回顾一下这个图,Driver Program是我们写的那个程序,它的核心是SparkContext,回想一下,从api的使用角度,RDD都必须通过它来获得。下面讲一讲它所不为认知的一面...
分类:
其他好文 时间:
2014-06-25 11:13:39
阅读次数:
288
Well , you know. As a college student who want to find a good job after graduating like me , scores are not that important. I just want to have some low scores which can help me graduate successfully...
分类:
其他好文 时间:
2014-06-25 09:59:37
阅读次数:
202
《机器学习那些事》介绍了一些机器学习应用中需要了解的“民间知识”。
原文为:
A Few Useful Things to Know about Machine Learning
摘录若干要点:
1. 学习 = 表示 + 评价 + 优化
表示(Representation) : 学习器的假设空间(hypothesis space)
评价(Evalua...
分类:
其他好文 时间:
2014-06-24 22:59:39
阅读次数:
325
Description
The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors', 'Ro, Sham, Bo', and a host of other names) i...
分类:
其他好文 时间:
2014-06-22 17:15:11
阅读次数:
275
As we all know,a thread is a separate process on your computer.you can run multiple threads all at the same time.
multi-threaded code has the disadvantage of becoming quite complex very quickly,altho...
分类:
其他好文 时间:
2014-06-22 07:25:06
阅读次数:
244
List of OpenFlow Software Projects (that I know of) http://yuba.stanford.edu/~casado/of-sw.html (I am trying to keep a running list of all OpenFlow-re...
分类:
其他好文 时间:
2014-06-21 15:44:58
阅读次数:
323
This is NOT a tutorial on how to use openvswitch, this is for developers who want to know the implementation details of openvswitch project, thus, I a...
分类:
其他好文 时间:
2014-06-21 15:15:15
阅读次数:
217
The JavaDoc says:SQLQuery org.hibernate.SQLQuery.addScalar(String columnAlias, Type type)Declare a scalar query resultI know whatexecuteScalaris in C#...
分类:
其他好文 时间:
2014-06-17 21:28:36
阅读次数:
236
因为需要,我创建了一个脚本叫 wf.sh (随意起什么名字),它可以读取当前目录下的 config.ini 配置文件来解析并执行工作流任务(Workflow)。
直接上代码:
config.ini
Workflow.Name = example
Workflow.Description = my work flow example \n and I know what's g...
分类:
其他好文 时间:
2014-06-17 19:18:30
阅读次数:
293