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 <k...@123.org> 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 <k...@123.org> 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 > >> k...@123.org > >> > >> > >> > >> > >> > > > > > > -- > > Lạc Trung > > 20083535 > > -- > Kai Voigt > k...@123.org > > > > > -- Lạc Trung 20083535
