Hi Here is the input file for the wordcount job: ****************** Hi This is a simple test. Hi Hadoop how r u. Hello Hello. Hi Hi. Hadoop Hadoop Welcome. ******************
After running the wordcount successfully here r the counters info: *************** Job Counters SLOTS_MILLIS_MAPS 0 0 8,386 Launched reduce tasks 0 0 1 Total time spent by all reduces waiting after reserving slots (ms) 0 0 0 Total time spent by all maps waiting after reserving slots (ms) 0 0 0 Launched map tasks 0 0 2 Data-local map tasks 0 0 2 SLOTS_MILLIS_REDUCES 0 0 9,199 *************** My question why r there 2 launched map tasks when i have only a small file. Per my understanding it is only 1 block. and should be only 1 split. Then for each line a map computation should occur but it shows 2 map tasks. Please let me know. Thanks Sai
