Decommissioning is for removing DNs and not the NN. Warm Regards, Tariq https://mtariq.jux.com/ cloudfront.blogspot.com
On Thu, Feb 14, 2013 at 5:18 AM, Arko Provo Mukherjee < arkoprovomukher...@gmail.com> wrote: > Hi, > > I was just wondering if it is okay to exclude the NN IP. > > I hope it won't create any "side effects". > > This is because I don't want to actually decommission the NN node, but > just make it stop working as a DataNode. > > However, if you are sure there are no problems, I will go ahead and > make the changes. > > Thanks & regards > Arko > > On Wed, Feb 13, 2013 at 5:43 PM, Mohammad Tariq <donta...@gmail.com> > wrote: > > It should. > > > > BTW what's the problem with decommissioning?It's the correct way of > removing > > the DN, as said by Charles earlier. Create the exclude file and add the > > property in the hdfs-site.xml file. > > > > Warm Regards, > > Tariq > > https://mtariq.jux.com/ > > cloudfront.blogspot.com > > > > > > On Thu, Feb 14, 2013 at 5:05 AM, Arko Provo Mukherjee > > <arkoprovomukher...@gmail.com> wrote: > >> > >> Hi, > >> > >> I see that the NameNode IP is present in conf/slaves file. > >> > >> Will removing the IP of the NN from the conf/slaves file and > >> restarting hadoop help? > >> > >> Thanks & regards > >> Arko > >> > >> On Wed, Feb 13, 2013 at 5:32 PM, Arko Provo Mukherjee > >> <arkoprovomukher...@gmail.com> wrote: > >> > Hi, > >> > > >> > I have 10 nodes. 1 Master Node (running all deamons) and 9 Slave Nodes > >> > (running DN and Task Tracker). > >> > > >> > My issue is that the my NN is getting filled up pretty fast as the NN > >> > acts as a DN. > >> > > >> > I want my NN not to function as the DN. > >> > > >> > Does including the IP for the NN in the "dfs.hosts.exclude" and > >> > running "$ hadoop dfsadmin -refreshNodes" solve my problem? > >> > > >> > Thanks & regards > >> > Arko > >> > > >> > On Wed, Feb 13, 2013 at 5:22 PM, Mohammad Tariq <donta...@gmail.com> > >> > wrote: > >> >> Stopping DN on one machine means excluding it. What exactly is the > >> >> requirement? How many nodes do you have right now? > >> >> > >> >> Warm Regards, > >> >> Tariq > >> >> https://mtariq.jux.com/ > >> >> cloudfront.blogspot.com > >> >> > >> >> > >> >> On Thu, Feb 14, 2013 at 4:36 AM, Arko Provo Mukherjee > >> >> <arkoprovomukher...@gmail.com> wrote: > >> >>> > >> >>> Hi, > >> >>> > >> >>> I am not sure the provided link matches my situation. > >> >>> > >> >>> That is because, I am not trying to exclude any node but just trying > >> >>> to stop the NN act as a DataNode. > >> >>> > >> >>> Thanks & regards > >> >>> Arko > >> >>> > >> >>> On Wed, Feb 13, 2013 at 2:31 PM, Arko Provo Mukherjee > >> >>> <arkoprovomukher...@gmail.com> wrote: > >> >>> > Thanks! Let me study and find out if it works for me. > >> >>> > Thanks & regards > >> >>> > Arko > >> >>> > > >> >>> > On Wed, Feb 13, 2013 at 2:28 PM, Arko Provo Mukherjee > >> >>> > <arkoprovomukher...@gmail.com> wrote: > >> >>> >> Hi, > >> >>> >> > >> >>> >> But the new location will also be the same NN physical server. > >> >>> >> So how does that help? > >> >>> >> > >> >>> >> I would like to clear up the space in the master by removing all > >> >>> >> the > >> >>> >> HDFS data to the slave nodes. > >> >>> >> > >> >>> >> Thanks & regards > >> >>> >> Arko > >> >>> >> > >> >>> >> On Wed, Feb 13, 2013 at 2:14 PM, Mohammad Tariq > >> >>> >> <donta...@gmail.com> > >> >>> >> wrote: > >> >>> >>> 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 > >> >>> >>> <arkoprovomukher...@gmail.com> 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 > >> >>> >>>> <donta...@gmail.com> > >> >>> >>>> 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 > >> >>> >>>> > <arkoprovomukher...@gmail.com> 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 > >> >>> >>>> >> <donta...@gmail.com> > >> >>> >>>> >> 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 > >> >>> >>>> >> > <arkoprovomukher...@gmail.com> 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 > >> >>> >>>> >> >> <cba...@sdl.com> > >> >>> >>>> >> >> 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:arkoprovomukher...@gmail.com] > >> >>> >>>> >> >> > Sent: Wednesday, February 13, 2013 11:32 AM > >> >>> >>>> >> >> > To: hdfs-user@hadoop.apache.org > >> >>> >>>> >> >> > 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 > >> >>> >>>> >> >> > notified > >> >>> >>>> >> >> > that any unauthorized review, use, disclosure, > >> >>> >>>> >> >> > dissemination, > >> >>> >>>> >> >> > distribution, > >> >>> >>>> >> >> > or copying of this communication, or any of its > contents, > >> >>> >>>> >> >> > is > >> >>> >>>> >> >> > strictly > >> >>> >>>> >> >> > prohibited. If you have received this communication in > >> >>> >>>> >> >> > error, > >> >>> >>>> >> >> > please > >> >>> >>>> >> >> > reply > >> >>> >>>> >> >> > to the sender and destroy all copies of the message. > >> >>> >>>> >> >> > Registered address: 201 Edgewater Drive, Suite 225, > >> >>> >>>> >> >> > Wakefield, MA > >> >>> >>>> >> >> > 01880, > >> >>> >>>> >> >> > USA > >> >>> >>>> >> >> > > >> >>> >>>> >> > > >> >>> >>>> >> > > >> >>> >>>> > > >> >>> >>>> > > >> >>> >>> > >> >>> >>> > >> >> > >> >> > > > > >
