Maybe you can check org.apache.hadoop.mapred.jobcontrol.* I did not try it myself but it looks like this is what you need.
Cheers, Christophe On Tue, Jun 3, 2008 at 5:55 PM, Ted Dunning <[EMAIL PROTECTED]> wrote: > No. > > At least you need to call runJob twice. Typically, it is safer to create > two job configurations so you don't forget to change something from the > first jobs. > > It isn't a big deal. Just do it! > > On Tue, Jun 3, 2008 at 8:31 AM, hong <[EMAIL PROTECTED]> wrote: > > > Hi all > > > > A job must be done in two pairs of map reduce, That is, Map1==> reduce1 > ==> > > map2==>reduce2. "==>" means the output file of left is the input of the > > right. > > To do that job, can I just create only one JobConf instance, and invoke > > JobClient.runJob(conf) once? > > > > Is there any similar example? > > > > Thank you, in advance! > > > > > -- > ted >
