Take a look at this, http://wiki.apache.org/lucene-hadoop/HowManyMapsAndReduces
It will answer why you have a few more map tasks that are set in the configuration. Dennis Murat Ali Bayir wrote: > my configs are given below: > in hadoop-site number of mapper = 130 > in my code I use job.setNumMapTasks = 130 > in hadoop-default numberof mapper = 2 > in this configuration I have taken 135 mapper in my job. However there > is no problem in number of reducer. > > Andrzej Bialecki wrote: > >> Murat Ali Bayir wrote: >> >>> Hi everbody, Although I change the number of mappers in >>> hadoop-site.xml and use job.setNumMapTasks method the system gives >>> another number as a number of mapper, the problem only occurs for >>> number of mapper, number of reducers works correctly. What I have >>> to do for setting the number of mappers in the system? >> >> >> Any value that you put in hadoop-site.xml will always override any >> other config settings, even those set programatically in >> job.setNumMapTasks. You should remove these settings from >> hadoop-site, and put them into mapred-default.xml. >> > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Nutch-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nutch-general
