https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154579#M117035 <P>Great to hear. Thanks for the feedback.</P> Fri, 16 Sep 2016 20:31:07 GMT clukasik 2016-09-16T20:31:07Z https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154576#M117032 <P>Hello I have a hive table splitted in 200 files</P><P>I was waiting to see 200 map task but counters only show 10 map task, why is this happening?</P> Thu, 15 Sep 2016 23:36:57 GMT https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154576#M117032 juan_manuel_nie 2016-09-15T23:36:57Z https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154577#M117033 <P>Hive will combine input splits by default (https://issues.apache.org/jira/browse/HIVE-2245).</P><P>Some tips on how to control this are <A href="https://streever.atlassian.net/wiki/display/HADOOP/Hive+Performance+Tips">here</A>. Look at the mapred.max.split.size and mapred.min.split.size properties.</P> Thu, 15 Sep 2016 23:49:54 GMT https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154577#M117033 clukasik 2016-09-15T23:49:54Z https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154578#M117034 <P>Thank was just this, mapreduce.input.fileinputformat.split.maxsize was set to 256000000.</P> Fri, 16 Sep 2016 17:12:33 GMT https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154578#M117034 juan_manuel_nie 2016-09-16T17:12:33Z https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154579#M117035 <P>Great to hear. Thanks for the feedback.</P> Fri, 16 Sep 2016 20:31:07 GMT https://community.cloudera.com/t5/Support-Questions/It-s-fine-this-number-of-maps/m-p/154579#M117035 clukasik 2016-09-16T20:31:07Z