Can anyone give me a diagram that describe the process from given input data to output data ?
Vào 02:57 Ngày 04 tháng 3 năm 2012, Lac Trung <[email protected]> đã viết: > Oh, I read it twice but it is familiar with > this<http://hadoop.apache.org/common/docs/r0.15.2/streaming.html>. > Now I think I should read Hadoop Pipe first. You are so pro, Kai. > > Vào 02:44 Ngày 04 tháng 3 năm 2012, Kai Voigt <[email protected]> đã viết: > > Hi, >> >> please read >> http://developer.yahoo.com/hadoop/tutorial/module4.html#streaming and >> http://developer.yahoo.com/hadoop/tutorial/module4.html#streaming for >> more explanation and examples. >> >> Kai >> >> Am 04.03.2012 um 16:10 schrieb Lac Trung: >> >> > Can you give one or some examples about this, Kai ? >> > I haven't understood how Hadoop run a mapreduce program in other >> language :D >> > >> > Vào 02:21 Ngày 04 tháng 3 năm 2012, Kai Voigt <[email protected]> đã viết: >> > >> >> Hi, >> >> >> >> the streaming API doesn't compile the streaming scripts. >> >> >> >> The PHP/Perl/Python/Ruby scripts you create as mapper and reducer will >> be >> >> called as external programs. >> >> >> >> The input key/value pairs will be send to your scripts as stdin, and >> the >> >> output will be collected from their stdout. >> >> >> >> So, no compilation, the scripts will just be executed. >> >> >> >> Kai >> >> >> >> Am 04.03.2012 um 15:42 schrieb Lac Trung: >> >> >> >>> Hi everyone ! >> >>> >> >>> Hadoop is written in Java, so mapreduce programs are written in Java, >> >> too. >> >>> But Hadoop provides an API to MapReduce that allows you to write your >> map >> >>> and reduce functions in languages other than Java (ex. Python), called >> >>> Hadoop Streaming. >> >>> I read the guide of Hadoop Streaming in >> >>> here< >> >> >> http://www.hadoop.apache.org/common/docs/r0.15.2/streaming.html#More+usage+examples >> >>> >> >>> but >> >>> I haven't seen any paragraph that write about converting language to >> >> Java. >> >>> Can anybody tell me how Hadoop compile the program written in language >> >>> other than Java. >> >>> >> >>> Thank you ! >> >>> -- >> >>> Lac Trung >> >> >> >> -- >> >> Kai Voigt >> >> [email protected] >> >> >> >> >> >> >> >> >> >> >> > >> > >> > -- >> > Lạc Trung >> > 20083535 >> >> -- >> Kai Voigt >> [email protected] >> >> >> >> >> > > > -- > Lạc Trung > 20083535 > > -- Lạc Trung 20083535
