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Re: Question about Name Spaces… - MapReduce - [mail # user]
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...Namespace divides are designed with application-level separation in mind. Sharing a file across namespaces does not make a whole lot of sense to me. Anyhow, the data is on the same set...
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Author: Harsh J,
2013-05-15, 18:30
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Re: which mapreduce project to work on? - MapReduce - [mail # dev]
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...Are you looking to do something similar to http://www.neilconway.org/docs/nsdi2010_hop.pdf? Ideally you should be working on MR2 which replaces MR1, and MR2 is available in the current...
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Author: Harsh J,
2013-05-15, 10:54
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Re: How do secondary name node get files from name node - MapReduce - [mail # user]
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...SNN does not fetch data of NN from memory. It copies off of the stored edits and fsimage files at the NN at the time of checkpoint request. The link I pointed to you has the current st...
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Author: Harsh J,
2013-05-14, 09:50
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Re: How do secondary name node get files from name node - MapReduce - [mail # user]
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...Hi Aditya, What do you mean by "addressing from memory"? Note that its difficult for us to answer your questions perfectly if you don't also specify exactly what you are looking to do ...
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Author: Harsh J,
2013-05-14, 09:17
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Re: Read namenode data from primary memory - MapReduce - [mail # user]
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...If you're looking to tail the metadata changes for analysis purposes, there's a more pluggable approach available in 2.x versions. If you're looking to backup the metadata outside of N...
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Author: Harsh J,
2013-05-14, 07:46
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[MAPREDUCE-3807] JobTracker needs fix similar to HDFS-94 - MapReduce - [issue]
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...1.0 JobTracker's jobtracker.jsp page currently shows:<h2>Cluster Summary (Heap Size is <%= StringUtils.byteDesc(Runtime.getRuntime().totalMemory()) %>/<%= StringUtils.byteDesc...
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http://issues.apache.org/jira/browse/MAPREDUCE-3807
Author: Harsh J,
2013-05-14, 06:14
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[MAPREDUCE-4454] MR does not audit-log the job kill operations - MapReduce - [issue]
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...Currently the JobTracker/MR AM's AuditLogger logs only job successes and failures.We should also log other things such as KILL, etc. (All under the Operations enum) such that MR has a proper...
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http://issues.apache.org/jira/browse/MAPREDUCE-4454
Author: Harsh J,
2013-05-14, 05:26
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Re: Hadoop schedulers! - MapReduce - [mail # user]
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...Hi, On Sat, May 11, 2013 at 8:31 PM, Rahul Bhattacharjee wrote: I'd suggest reading design of both schedulers. The preemption feature is not the only difference - there is ...
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Author: Harsh J,
2013-05-13, 18:51
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Re: How to combine input files for a MapReduce job - MapReduce - [mail # user]
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...Yes I believe the branch-1 patch attached there should apply cleanly to 1.0.4. On Mon, May 13, 2013 at 1:25 PM, Agarwal, Nikhil wrote: Harsh J...
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Author: Harsh J,
2013-05-13, 07:58
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Re: How to combine input files for a MapReduce job - MapReduce - [mail # user]
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...Shashwat, Tweaking the split sizes affects a single input split, not how the splits are packed. It may be used with the CombineFileInputFormat to control packed split sizes, but would ...
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Author: Harsh J,
2013-05-13, 07:43
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