hive合併小文件

set hive.merge.mapfiles=true;
set hive.merge.mapredfiles=true;
set hive.merge.orcfile.stripe.level=true;
set hive.merge.size.per.task=256000000;
set hive.merge.smallfiles.avgsize=256000000;
set mapreduce.input.fileinputformat.split.maxsize=256000000;
set mapreduce.input.fileinputformat.split.minsize=256000000;
set mapreduce.input.fileinputformat.split.minsize.per.node=256000000;
set mapreduce.input.fileinputformat.split.minsize.per.rack=256000000;