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[HDFS-4257] The ReplaceDatanodeOnFailure policies could have a forgiving option - HDFS - [issue]
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...Similar question has previously come over HDFS-3091 and friends, but the essential problem is: "Why can't I write to my cluster of 3 nodes, when I just have 1 node available at a point in ti...
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http://issues.apache.org/jira/browse/HDFS-4257
Author: Harsh J,
2012-12-02, 04:31
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Re: Assigning reduce tasks to specific nodes - HDFS - [mail # user]
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...Yes, scheduling is done on a Tasktracker heartbeat basis, so it is certainly possible to do absolutely strict scheduling (although be aware of the condition of failing/unavailable tasktracke...
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Author: Harsh J,
2012-12-01, 12:27
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Re: how to rebuild hadoop-core-0.20.2-cdh3u4.jar - HDFS - [mail # user]
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...Hi, Since this is a CDH build specific question, I am moving the post to [EMAIL PROTECTED] [https://groups.google.com/a/cloudera.org/forum/?fromgroups=#!forum/cdh-user] To answer...
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Author: Harsh J,
2012-12-01, 10:34
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Re: Mapper outputs an empty file - HDFS - [mail # user]
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...The lack of conditional logic suggests that an empty file should never occur for a _successful_ parse. So the question boils down to successful parsing. What exactly is your RecordRead...
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Author: Harsh J,
2012-11-30, 12:57
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Re: Clarifications on excludedNodeList in DFSClient - HDFS - [mail # dev]
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...Hi Inder, I didn't see a relevant JIRA on this yet, so I went ahead and filed one at https://issues.apache.org/jira/browse/HDFS-4246 as it seems to affect HBase WALs too (when their bl...
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Author: Harsh J,
2012-11-30, 11:50
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[HDFS-4224] The dncp_block_verification log can be compressed - HDFS - [issue]
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...On some systems, I noticed that when the scanner runs, the dncp_block_verification.log.curr file under the block pool gets quite large (several GBs). Although this is rolled away, we could a...
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http://issues.apache.org/jira/browse/HDFS-4224
Author: Harsh J,
2012-11-26, 14:37
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Re: FileNotFoundExcepion when getting files from DistributedCache - HDFS - [mail # user]
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...DistributedCache files in tasks are located locally (not on HDFS), so use the LocalFileSystem or java.io.File if you prefer that, to read them from within tasks. On Fri, Nov 23, 2012 a...
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Author: Harsh J,
2012-11-22, 20:50
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Re: FileNotFoundExcepion when getting files from DistributedCache - HDFS - [mail # user]
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...You pointed that you use: FSDataInputStream fs = FileSystem.get( context.getConfiguration() ).open( path ) Note that this (FileSystem.get) will return back a HDFS FileSystem by d...
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Author: Harsh J,
2012-11-22, 20:38
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Re: adding new datanode into cluster needs restarting the namenode? - HDFS - [mail # user]
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...Hi, Topologies are unfortunately cached in Hadoop today and not refreshed until restart. So if you add a DN before properly configuring its topology, its improper default will st...
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Author: Harsh J,
2012-11-22, 14:03
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Re: Clarifications on excludedNodeList in DFSClient - HDFS - [mail # dev]
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...The excludeNode list is initialized for each output stream created under a DFSClient instance. That is, it is empty for every new FS.create() returned DFSOutputStream initially and is mainta...
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Author: Harsh J,
2012-11-20, 18:19
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