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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...if you want to use savenamespace then yes. Normally to have a backup copy of the FSImage, previously there was a secondary namenode and now there is checkpoint NN. SNN was deprecated b...
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Author: Nitin Pawar,
2013-05-14, 07:43
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...every 5 minutes seems too much. why not do a daily or say 8 hours basis On Tue, May 14, 2013 at 12:51 PM, Sandeep Nemuri wrote: Nitin Pawar...
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Author: Nitin Pawar,
2013-05-14, 07:23
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...if you do not put namenode in safemode that means your namenode can still accept request to write or delete files from hdfs. This may cause your snapshot to be a problematic in case you want...
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Author: Nitin Pawar,
2013-05-14, 07:01
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Re: Install Hadoop on Linux Pseudo Distributed Mode - Root Required? - MapReduce - [mail # user]
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...You do not root if you want to install everything in your home directory and assuming sun jdk is installed On May 13, 2013 8:13 PM, "Raj Hadoop" wrote: ...
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Author: Nitin Pawar,
2013-05-13, 14:47
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Re: The minimum memory requirements to datanode and namenode? - MapReduce - [mail # user]
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...4GB memory on NN? this will run out of memory in few days. You will need to make sure your NN has atleast more than double RAM of your DNs if you have a miniature cluster. ...
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Author: Nitin Pawar,
2013-05-13, 06:53
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Re: The minimum memory requirements to datanode and namenode? - MapReduce - [mail # user]
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...just one node not having memory does not mean your cluster is down. Can you see your hdfs health on NN UI? how much memory do you have on NN? if there are no jobs running on the ...
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Author: Nitin Pawar,
2013-05-13, 06:00
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Re: The minimum memory requirements to datanode and namenode? - MapReduce - [mail # user]
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...Sam, There is no formula for determining how much memory one should give to datanode and tasktracker. Ther formula is available for how many slots you want to have on a machine. ...
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Author: Nitin Pawar,
2013-05-13, 05:51
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Re: Submitting a hadoop job in large clusters. - MapReduce - [mail # user]
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...nope in MRv1 only jobtracker can accept jobs. You can not trigger job on any other process in hadoop other than jobtracker. On Sun, May 12, 2013 at 11:25 PM, Shashidhar Rao <[EMAIL...
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Author: Nitin Pawar,
2013-05-12, 17:56
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Re: Problem while running simple WordCount program(hadoop-1.0.4) on eclipse. - MapReduce - [mail # user]
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...its a /tmp/ folder so I guess all the users will need access to it. better it make it a routine linux like /tmp folder On Sun, May 12, 2013 at 11:12 PM, shashwat shriparv wrote:...
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Author: Nitin Pawar,
2013-05-12, 17:46
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Re: Hadoop noob question - MapReduce - [mail # user]
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...you can do that using file:/// example: hadoop distcp hdfs://localhost:8020/somefile file:///Users/myhome/Desktop/ On Sun, May 12, 2013 at 5:23 PM, Rahul Bhattacharj...
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Author: Nitin Pawar,
2013-05-12, 12:06
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