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Namenode doesn't accurately know datanodes free-space - MapReduce - [mail # user]
...I see that the Namenode always reports datanodes as having about 5% more space then they actually do.  And I recently added some smaller datanodes into the cluster and the drives filled...
   Author: alex bohr, 2013-10-29, 17:07
[expand - 1 more] - Re: DFSClient: Could not complete write history logs - MapReduce - [mail # user]
...I should add we recently changed some mapred-site properties on the Jobtracker to tone down how much history the job-tracker stores in memory.  Is it possible these settings are too agr...
   Author: alex bohr, 2013-10-25, 19:40
Re: Hosting Hadoop - MapReduce - [mail # user]
...Hi Dhaval, Sorry just saw this email (oops) so might not be relevant - but: We didn't encounter too much Funky issues that we were worried about regarding random resource constraints or rand...
   Author: alex bohr, 2013-10-16, 17:33
in place upgrade to CDH4 - MapReduce - [mail # user]
...Hi, I'm working on upgrading my cluster from CDH3u5 to CDH4.  Trying to do the upgrade in place rather than creating a new cluster and migrating over.  Doing this on a test cluster...
   Author: alex bohr, 2013-09-18, 22:06
fsck -move is copying not moving - MapReduce - [mail # user]
...I have some corrupt blocks that I want to move to lost+found and work on recovering from the good blocks.  So I ran hadoop fsck  /my/bad/filepath -move  And it copied a bunch ...
   Author: alex bohr, 2013-09-13, 18:56
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