04 2015 档案

• hadoop 配置 单台机器
  摘要：http://khangaonkar.blogspot.com/2012/09/hadoop-2x-tutorial.html1. hdfs-site.xmlnamenode and datanode folder need to create in advance, all the content... 阅读全文
  posted @ 2015-04-29 02:50 phoenix13 阅读(465) 评论(0) 推荐(0)
• Hadoop 基本概念
  摘要：1. Combinercombiner is between map and reduce, similar to reducer, combine some data before reducer.http://hadooptutorial.wikispaces.com/Custom+combin... 阅读全文
  posted @ 2015-04-28 11:31 phoenix13 阅读(230) 评论(0) 推荐(0)
• Hadoop basic
  摘要：1. load file into hdfshadoop fs -put src destexample: load a fold "input" into hdfs "input1" folder, "input1" folder must not already existyou can no... 阅读全文
  posted @ 2015-04-22 08:28 phoenix13 阅读(193) 评论(0) 推荐(0)
• create auto increment row with select in postgreSQL
  摘要：http://stackoverflow.com/questions/3959692/rownum-in-postgresqlSELECT row_number() OVER (ORDER BY col1) AS i, e.col1, e.col2, ... FROM... 阅读全文
  posted @ 2015-04-16 06:55 phoenix13 阅读(194) 评论(0) 推荐(0)
• Linq and XML
  摘要：https://msdn.microsoft.com/en-us/library/bb943906.aspxBasic Queries (LINQ to XML)1. add to xml document public void sendMsg(string senderID, string re... 阅读全文
  posted @ 2015-04-13 15:22 phoenix13 阅读(201) 评论(0) 推荐(0)
• python use pymysql
  摘要：import pymysqlconn = pymysql.connect(host='localhost', port=3306, user='root', passwd='123456', db='mydb')cur = conn.cursor()cur.execute("SELECT * FRO... 阅读全文
  posted @ 2015-04-11 08:36 phoenix13 阅读(214) 评论(0) 推荐(0)
• python install package on windows
  摘要：http://www.cc.gatech.edu/classes/AY2012/cs2316_fall/presentations/HOWTO_install_pymysql_windows.pdf1. go to the fold of the package you want to instal... 阅读全文
  posted @ 2015-04-11 08:28 phoenix13 阅读(325) 评论(0) 推荐(0)