Larry's helper classes would be a useful addition to hive/contrib. Carl
2009/11/12 Larry Ogrodnek <[email protected]> > Hello Gang, > > I put together some examples and helper classes for writing hive > map/reduce scripts in java here: > > http://dev.bizo.com/2009/10/hive-map-reduce-in-java.html > > I hope it is useful. > > thanks, > larry > > 2009/11/12 Larry Ogrodnek <[email protected]>: > > Hello Gang, > > > > I put together some examples and helper classes for writing hive > > map/reduce scripts in java here: > > > > http://dev.bizo.com/2009/10/hive-map-reduce-in-java.html > > > > I hope it is useful. > > > > 2009/11/12 Gang Luo <[email protected]>: > >> Thanks Zheng. It helps. > >> > >> > >> -Gang > >> > >> > >> > >> ----- 原始邮件 ---- > >> 发件人： Zheng Shao <[email protected]> > >> 收件人： [email protected]; [email protected] > >> 发送日期： 2009/11/12 (周四) 7:10:33 下午 > >> 主 题： Re: How to use comstom mapreduce script > >> > >> Yes you can compile it into a jar, and insert the command line "java > >> /xxx/my.jar" into Hive queries. > >> > >> http://www.slideshare.net/ragho/hive-user-meeting-august-2009-facebook > >> Page 72 has an example > >> > >> IF your map/reduce function is simple, you can probably write a Hive > >> UDF instead. > >> In the near future, Hive will support UDTF and you can write a UDTF > >> for any map/reduce function. This will make it more efficient than the > >> current way (running "java /xxx/my.jar"). > >> > >> > >> Zheng > >> > >> 2009/11/13 Gang Luo <[email protected]>: > >>> Hi all, > >>> It is said that we can plug our own map/reduce into hive. I got two > >>> questions here. > >>> 1) Can I write this 'script' in Java? If so, should I compile it and > make it > >>> into a jar file first? > >>> 2) Should I load this script file into HDFS first? > >>> > >>> Thanks. > >>> > >>> --Gang > >>> > >>> ________________________________ > >>> 好玩贺卡等你发，邮箱贺卡全新上线！ > >> > >> > >> > >> -- > >> Yours, > >> Zheng > >> > >> > >> > >> ___________________________________________________________ > >> 好玩贺卡等你发，邮箱贺卡全新上线！ > >> http://card.mail.cn.yahoo.com/ > >> > > >
