[Hadoop-common-user] How to Speed Up Decommissioning progress of a datanode.

--Adarsh

You can use metasave to check the bottleneck of decommion speed,
If the bottleneck is the speed of namenode dispatch. You can tuning
dfs.max-repl-streams to a large number (default 2).
If there're many timeout block replication tasks from pending replication
queue to need replication , you can tuning
dfs.replication.pending.timeout.sec to a smaller numer, to make block
replcation more positive.

Pay attention!! Please check your hadoop version, if block transfer has no
speed limit, the bandwidth may be stuff full


Thanks & Best regards
Baggio


2010/12/16 sravankumar <[email protected]>