hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Koji Noguchi <knogu...@yahoo-inc.com>
Subject Re: Stopping datanodes dynamically.
Date Mon, 31 Jan 2011 17:16:16 GMT
If you want to decommission a datanode,

http://hadoop.apache.org/common/docs/r0.20.0/hdfs_user_guide.html#DFSAdmin+Command
-refreshNodes  briefly explains how it works.

Koji


On 1/31/11 4:35 AM, "Segel, Mike" <msegel@navteq.com> wrote:

James,

Remove the node without stopping what?

If you mean you want to remove the data node without stopping the master, you have a couple
of ways...

First, if you're running Cloudera's CDH3b3 release you have /etc/init.d scripts where you
can issue a stop command.
(Stopping the datanode and the task tracker job.)

Or you could use a kill -9 , or a killall -9 java to stop the processes.

After 10 minutes the name node sees the data node as non-responsive and marks it as down.
If you want to remove the data node permanently, there are other steps....


HTH

-Mike

________________________________________
From: James Ram [hadooprj@gmail.com]
Sent: Monday, January 31, 2011 3:02 AM
To: common-dev@hadoop.apache.org
Subject: Stopping datanodes dynamically.

Hi,

Can anyone please answer the question. How to remove the datanodes
dynamically from the masternode without stopping it?


The information contained in this communication may be CONFIDENTIAL and is intended only for
the use of the recipient(s) named above.  If you are not the intended recipient, you are hereby
notified that any dissemination, distribution, or copying of this communication, or any of
its contents, is strictly prohibited.  If you have received this communication in error, please
notify the sender and delete/destroy the original message and any copy of it from your computer
or paper files.


Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message