Sure, thanks! One last question before I go ahead and make the changes. My hdfs-site.xml doesn't have an entry for dfs.replication. So can I just assume that the system is using the default of 3? I ask this because if it is 1, then I will first have to increase it so as to not loose data when I stop the NN being a DN. Thanks & regards Arko
On Wed, Feb 13, 2013 at 5:51 PM, Mohammad Tariq <donta...@gmail.com> wrote: > 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 >> >> >>> >>>> >> >> > >> >> >>> >>>> >> > >> >> >>> >>>> >> > >> >> >>> >>>> > >> >> >>> >>>> > >> >> >>> >>> >> >> >>> >>> >> >> >> >> >> >> >> > >> > > >
