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Re: Changing a Namenode server - HDFS - [mail # user]
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...On Mar 16, 2011, at 7:17 AM, Lior Schachter wrote: the system It is pretty much the same procedure as if you had perm. lost the NN hardware, more or less: 1) ...
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Author: Allen Wittenauer,
2011-03-16, 14:30
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Re: how does hdfs determine what node to use? - HDFS - [mail # user]
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...On Mar 10, 2011, at 10:34 AM, Jeffrey Buell wrote: per rack do you have? having greater replication in the shuffle or reduce phases? That is, is hadoop smart enough that wh...
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Author: Allen Wittenauer,
2011-03-14, 16:28
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Re: Will blocks of an unclosed file get lost when HDFS client (or the HDFS cluster) crashes? - HDFS - [mail # user]
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...No. If a close hasn't been committed to the file, the associated blocks/files disappear in both client crash and namenode crash scenarios. On Mar 13, 2011, a...
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Author: Allen Wittenauer,
2011-03-14, 16:21
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Re: Merging Namenode Federation feature (HDFS-1052) to trunk - HDFS - [mail # dev]
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...On Mar 3, 2011, at 2:41 PM, Suresh Srinivas wrote: branch HDFS-1052. The work items are created as subtask of the jira HDFS-1 052 and are based on the design document published in the...
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Author: Allen Wittenauer,
2011-03-12, 16:43
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Re: HDFS drive, partition best practice - HDFS - [mail # user]
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...On Feb 8, 2011, at 12:22 PM, Patrick Angeles wrote: s I keep ignoring their requests to come interview, so that might have somet hing to do with it. Hmm....
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Author: Allen Wittenauer,
2011-02-08, 20:43
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Re: HDFS drive, partition best practice - HDFS - [mail # user]
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...On Feb 8, 2011, at 11:33 AM, Adam Phelps wrote: aven't set dfs.datanode.failed.volumes.tolerated in hdfs-site.xml. You can up that number to allow DataNode to tolerate dead...
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Author: Allen Wittenauer,
2011-02-08, 20:09
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Re: Altering logical rack configuration - HDFS - [mail # user]
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...On Feb 4, 2011, at 5:00 PM, Jonathan Disher wrote: no longer here) did not specify logical racks in the HDFS configuration, in stead leaving everything in "default-rack". Now I h...
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Author: Allen Wittenauer,
2011-02-08, 18:47
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Re: HDFS drive, partition best practice - HDFS - [mail # user]
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...On Feb 8, 2011, at 7:20 AM, John Buchanan wrote: h e Don't bother RAID'ing the system drive. Seriously. You're giving up perf ormance for something that rarely happens. &...
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Author: Allen Wittenauer,
2011-02-08, 17:25
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Re: changing the block size - HDFS - [mail # user]
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...On Feb 6, 2011, at 2:24 PM, Rita wrote: ead Right. As previously mentioned, changing the block size does not change the block s of the previously written files. In other...
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Author: Allen Wittenauer,
2011-02-08, 00:16
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Re: help:2 problems in using hadoop sequencefile - HDFS - [mail # dev]
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...On Jan 18, 2011, at 6:15 PM, 张春玮 wrote: There is no working append code in any released version of Apache Hadoop 0.20.2. So you'll need to read all the files with an identity ma...
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Author: Allen Wittenauer,
2011-02-04, 02:20
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