Hi, Did you try Hadoop rebalancer ?
http://hadoop.apache.org/docs/r1.0.4/hdfs_user_guide.html#Rebalancer On 14 July 2014 04:10, 风雨无阻 <232341...@qq.com> wrote: > HI all: > > After the cluster configuration rack awareness,run " hadoop fsck / " > A lot of the following error occurred: > Replica placement policy is violated for > blk_-1267324897180563985_11130670. Block should be additionally replicated > on 1 more rack(s). > > Online said "The reason is that three copies on the same rack" . > The solution is now: > hadoop dfs -setrep 4 > /user/hive/warehouse/tbl_add_av_errorlog_android/dt=2013-08-24/000004_0 > sleep N > hadoop dfs -setrep 3 > /user/hive/warehouse/tbl_add_av_errorlog_android/dt=2013-08-24/000004_0 > But the speed is very slow。 > > What is a better good way to make HDFS become healthy? > > Thanks, > Ma Jian >
