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Re: Query: Hadoop's threat to Informatica - HDFS - [mail # user]
...Informatica's take on the question:  http://www.informatica.com/hadoop/  My take on the question:  Hadoop is definitely disruptive and there have been times where we've been a...
   Author: Jeff Bean, 2013-01-18, 14:12
Re: Fair Scheduler is not Fair why? - HDFS - [mail # user]
...Hi Dhanasekaran,  The issue is not with Hadoop streaming. You can try this yourself:  On your local disk, touch a bunch of files, like this:  mkdir stream cd stream touch 1 2 ...
   Author: Jeff Bean, 2013-01-17, 18:35
Re: A simple question - how to understand version number in "Hadoop-0.20.2+923.421" ? - HDFS - [mail # user]
...This is a Cloudera release level.  Specifically, it's CDH3, update 5. It means we've taken hadoop-0.20.2, added 923 additional patches during beta for CDH3, 421 patches applied after th...
   Author: Jeff Bean, 2013-01-16, 17:47
[HDFS-2849] Improved usability around node decommissioning and block replication on dfshealth.jsp - HDFS - [issue]
...When you do this: Decom a single node. Underreplicated count reports all blocks. Stop decom. Underreplication count reduces slowly and heads to 0.This is expected behavior of HDFS but while ...
http://issues.apache.org/jira/browse/HDFS-2849    Author: Jeff Bean, 2012-03-10, 13:56
Re: rebalancing data on disks? - HDFS - [mail # user]
...IIUC you can move the data block files from one disk to another until they a re evenly distributed. Give it a shot.  Sent from my iPad  On Oct 31, 2011, at 6:49, Tomasz Chmielewski...
   Author: Jeff Bean, 2011-10-31, 14:37
Re: About the combiner execution - HDFS - [mail # user]
...Yes this is true. Combiner may never run if intermediate values don't need t o shuffle out to disk before the final output is done. Also, combiner cant b e substituted as a reducer.   S...
   Author: Jeff Bean, 2011-07-10, 15:29
[expand - 1 more] - Re: Changing dfs.block.size - HDFS - [mail # user]
...Sorry, that's rep factor and not blocksize. I think you need to copy the fil es.  Sent from my iPhone  On Jun 6, 2011, at 12:09 PM, "J. Ryan Earl"  wrote:  fs-site.xml. &...
   Author: Jeff Bean, 2011-06-06, 19:29
Re: Any fix for this? - HDFS - [mail # user]
...If I understand correctly, datanode reports its blocks based on the contents of dfs.data.dir.  When you cloned the data node, you cloned all of its blocks as well.  When you add a ...
   Author: Jeff Bean, 2011-05-11, 21:02
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