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/ >> >
