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Re: Managing space in Master Node
No, copy this directory to the new location of your choice.

Warm Regards,
Tariq
https://mtariq.jux.com/
cloudfront.blogspot.com
On Thu, Feb 14, 2013 at 1:42 AM, Arko Provo Mukherjee <
[EMAIL PROTECTED]> wrote:

> Thanks!
> However, in that case, how do I handle the current data that is already in
> NN?
> Do I have to reformat HDFS?
> Thanks & regards
> Arko
>
> On Wed, Feb 13, 2013 at 2:06 PM, Mohammad Tariq <[EMAIL PROTECTED]>
> wrote:
> > Just don't run the DN daemon on that machine. Dedicate that machine to
> NN.
> > Remove the hostname of the NN machine from the 'slaves' file.
> >
> > Warm Regards,
> > Tariq
> > https://mtariq.jux.com/
> > cloudfront.blogspot.com
> >
> >
> > On Thu, Feb 14, 2013 at 1:31 AM, Arko Provo Mukherjee
> > <[EMAIL PROTECTED]> wrote:
> >>
> >> Hi,
> >>
> >> Thanks for the help!
> >>
> >> However, I am still unsure about how to "turn off" the datanode
> >> feature on the NN.
> >>
> >> I checked the "hdfs-site.xml" file and the dfs.data.dir is pointed to
> >> a directory.
> >>
> >> Should I just comment out that property? What would happen to the
> >> current data that there is in the Master? Will it get removed
> >> automatically?
> >>
> >> Thanks & regards
> >> Arko
> >>
> >>
> >>
> >> On Wed, Feb 13, 2013 at 1:55 PM, Mohammad Tariq <[EMAIL PROTECTED]>
> >> wrote:
> >> > You can specify the logging level as specified by Charles. But turning
> >> > logs
> >> > off is never a good idea. Logs are really helpful in problem
> diagnosis,
> >> > which are eventual.
> >> >
> >> > Warm Regards,
> >> > Tariq
> >> > https://mtariq.jux.com/
> >> > cloudfront.blogspot.com
> >> >
> >> >
> >> > On Thu, Feb 14, 2013 at 1:22 AM, Arko Provo Mukherjee
> >> > <[EMAIL PROTECTED]> wrote:
> >> >>
> >> >> Hi,
> >> >>
> >> >> Yeah, my NameNode is also seconding as a DataNode.
> >> >>
> >> >> I would like to "turn off" this feature.
> >> >>
> >> >> Request help regarding the same.
> >> >>
> >> >> Thanks & regards
> >> >> Arko
> >> >>
> >> >> On Wed, Feb 13, 2013 at 1:38 PM, Charles Baker <[EMAIL PROTECTED]>
> wrote:
> >> >> > Hi Arko. Sounds like you may be running a DataNode on the NameNode
> >> >> > which
> >> >> > is
> >> >> > not recommended practice. Normally, the only files the NN stores
> are
> >> >> > the
> >> >> > image and edits files. It does not store any actual HDFS data. If
> you
> >> >> > must
> >> >> > run a DN on the NN, try turning down the logging in
> >> >> > /conf/log4j.properties:
> >> >> >
> >> >> > #hadoop.root.logger=INFO,console
> >> >> > #hadoop.root.logger=WARN,console
> >> >> > hadoop.root.logger=ERROR,console
> >> >> >
> >> >> > Depending on the logging information you require, of course.
> >> >> >
> >> >> > -Chuck
> >> >> >
> >> >> >
> >> >> > -----Original Message-----
> >> >> > From: Arko Provo Mukherjee [mailto:[EMAIL PROTECTED]]
> >> >> > Sent: Wednesday, February 13, 2013 11:32 AM
> >> >> > To: [EMAIL PROTECTED]
> >> >> > Subject: Managing space in Master Node
> >> >> >
> >> >> > Hello Gurus,
> >> >> >
> >> >> > I am managing a Hadoop Cluster to run some experiments.
> >> >> >
> >> >> > The issue I am continuously facing is that the Master Node runs out
> >> >> > of
> >> >> > disk
> >> >> > space due to logs and data files.
> >> >> >
> >> >> > I can monitor and delete log files. However, I cannot delete the
> HDFS
> >> >> > data.
> >> >> >
> >> >> > Thus, is there a way to force Hadoop not to save any HDFS data in
> the
> >> >> > Master
> >> >> > Node?
> >> >> >
> >> >> > Then I can use my master to handle the metadata only and store the
> >> >> > logs.
> >> >> >
> >> >> > Thanks & regards
> >> >> > Arko
> >> >> > SDL Enterprise Technologies, Inc. - all rights reserved.  The
> >> >> > information contained in this email may be confidential and/or
> >> >> > legally
> >> >> > privileged. It has been sent for the sole use of the intended
> >> >> > recipient(s).
> >> >> > If you are not the intended recipient of this mail, you are hereby