hive-merge small file

[majian]

Hello：

I want merge reduce output file 。

hadoop version:hadoop-0.20.205.0/
hive version: hive-0.9.0 

for example:

hive>set hive.merge.mapredfiles=true;
hive>set hive.merge.smallfiles.avgsize=160000000000;
hive>set mapred.reduce.tasks=10;
hive>insert overwrite local directory "/home/db_hive_user/data0"
        select aaer_userid,count(1) from temp_1206 group by aaer_userid;


but, why reduce output is 10 files?

2013-05-22 



majian