hey did u storing data in zipped format if yes becoz of that its only split in single map.
2011/8/23 Daniel,Wu <[email protected]> > I run the following simple sql > select count(*) from sales; > And the job information shows it only uses one map task. > > The underlying hadoop has 3 data/data nodes. So I expect hive should kick > off 3 map tasks, one on each task nodes. What can make hive only run one map > task? Do I need to set something to kick off multiple map task? in my > config, I didn't change hive config. > > > -- With Regards Vikas Srivastava DWH & Analytics Team Mob:+91 9560885900 One97 | Let's get talking !
