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Re: Query: Hadoop's threat to Informatica - HDFS - [mail # user]
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...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...
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Author: Jeff Bean,
2013-01-18, 14:12
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Re: Fair Scheduler is not Fair why? - HDFS - [mail # user]
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...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 ...
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Author: Jeff Bean,
2013-01-17, 18:35
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Re: A simple question - how to understand version number in "Hadoop-0.20.2+923.421" ? - HDFS - [mail # user]
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...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...
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Author: Jeff Bean,
2013-01-16, 17:47
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[HDFS-2849] Improved usability around node decommissioning and block replication on dfshealth.jsp - HDFS - [issue]
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...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 ...
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http://issues.apache.org/jira/browse/HDFS-2849
Author: Jeff Bean,
2012-03-10, 13:56
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Re: rebalancing data on disks? - HDFS - [mail # user]
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...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...
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Author: Jeff Bean,
2011-10-31, 14:37
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Re: About the combiner execution - HDFS - [mail # user]
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...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...
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Author: Jeff Bean,
2011-07-10, 15:29
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Re: Changing dfs.block.size - HDFS - [mail # user]
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...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. &...
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Author: Jeff Bean,
2011-06-06, 19:29
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Re: Changing dfs.block.size - HDFS - [mail # user]
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...hadoop fs -setrep Sent from my iPhone On Jun 6, 2011, at 12:09 PM, "J. Ryan Earl" wrote: fs-site.xml. I understand that when files are created, blocksizes can b...
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Author: Jeff Bean,
2011-06-06, 19:29
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Re: Any fix for this? - HDFS - [mail # user]
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...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 ...
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Author: Jeff Bean,
2011-05-11, 21:02
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