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Re: APIs to move data blocks within HDFS - Hadoop - [mail # dev]
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...There's no filesystem (i.e. client) level APIs to do this, but the Balancer tool of HDFS does exactly this. Reading its sources should let you understand what kinda calls you need to make to...
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Author: Harsh J,
2013-02-22, 19:17
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Re: Locks in HDFS - Hadoop - [mail # user]
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...Hi Abhishek, I fail to understand what you mean by that; but HDFS generally has no client-exposed file locking on reads. There's leases for preventing multiple writers to a single file...
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Author: Harsh J,
2013-02-22, 16:09
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Re: Rookie to Hadoop - Hadoop - [mail # general]
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...Hi Ganesh, First off, this is the wrong list to ask user questions. The right list is [EMAIL PROTECTED], as is instructed on http://hadoop.apache.org/mailing_lists.html. If any text th...
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Author: Harsh J,
2013-02-22, 08:02
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Re: Locks in HDFS - Hadoop - [mail # user]
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...HDFS does not have such a client-side feature, but your applications can use Apache Zookeeper to coordinate and implement this on their own - it can be used to achieve distributed locking. W...
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Author: Harsh J,
2013-02-22, 06:03
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Re: How to add another file system in Hadoop - Hadoop - [mail # user]
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...What Hemanth points to (fs.TYPE.impl, i.e. fs.cdmi.impl being set to the classname of the custom FS impl.) is correct for the 1.x releases. In 2.x and ahead, the class for a URI is auto-disc...
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Author: Harsh J,
2013-02-21, 12:53
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Re: Piping output of hadoop command - Hadoop - [mail # user]
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...Hi, The command you're looking for is not -copyToLocal (it doesn't really emit the file, which you seem to need here), but rather a simple -cat: Something like the below would ma...
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Author: Harsh J,
2013-02-18, 18:01
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Re: [ANNOUNCE] hadoop-2.0.3-alpha released! - Hadoop - [mail # general]
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...Thanks for doing this Arun, and the extra notes as well! Karthik - Looks like http://hadoop.apache.org/docs/ doesn't seem to have 2.0.3 docs yet. I think the location of putting down d...
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Author: Harsh J,
2013-02-15, 18:00
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Re: configure mapreduce to work with pem files. - Hadoop - [mail # user]
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...Hi, Nodes in Hadoop do not communicate using SSH. See http://wiki.apache.org/hadoop/FAQ#Does_Hadoop_require_SSH.3F On Wed, Feb 13, 2013 at 5:16 PM, Pedro Sá da Costa wrote:...
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Author: Harsh J,
2013-02-13, 12:58
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Re: Anyway to load certain Key/Value pair fast? - Hadoop - [mail # general]
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...Please do not use the general@ lists for any user-oriented questions. Please redirect them to [EMAIL PROTECTED] lists, which is where the user community and questions lie. I've moved y...
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Author: Harsh J,
2013-02-13, 05:29
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Re: The method setMapperClass(Class<? extends Mapper>) in the type Job is not applicable for the arguments - Hadoop - [mail # user]
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...Your import line of Mapper has the issue. It is imported as below, which can probably be removed as it is unnecessary: import org.apache.hadoop.mapreduce.Mapper.Context; But you ...
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Author: Harsh J,
2013-02-09, 18:35
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