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DistCP : Is it gauranteed to work for any two uri schemes? - Hadoop - [mail # user]
...Overall the whole DistCp utility is devoid of any HDFS specific items,but does have some (mostly skippable) checks pertaining to FS levelfeatures such as permissions, checksums, etc.. It sho...
   Author: Harsh J , 2014-02-04, 13:34
what's counterpart for org.apache.hadoop.mapred.TaskTrackerMetricsInst in YARN - Hadoop - [mail # user]
...Unfortunately there isn't a direct equivalent available for pluggingin instrumentation classes in YARN's NodeManagers currently. Theclosest I can locate is a comment hint in the NodeManagerM...
   Author: Harsh J , 2014-02-04, 13:03
[expand - 1 more] - Backup NameNode metadata in HA configuration - Hadoop - [mail # user]
...Nothing wrong in copying it - except it would come with a bunch ofredundant information (extra retained edit logs already merged intoone of the recent fsimages).On Tue, Feb 4, 2014 at 12:07 ...
   Author: Harsh J , 2014-02-04, 07:43
Force one mapper per machine (not core)? - Hadoop - [mail # user]
...If it's job tracker you use, it's MR1.On Feb 1, 2014 12:23 AM, "Keith Wiley"  wrote:...
   Author: Harsh J , 2014-02-01, 00:47
Capture Directory Context in Hadoop Mapper - Hadoop - [mail # user]
...Hi,  These posts are nicely written - thanks for sharing! Have you also taken a look at the MultipleInputs feature, which gives you a cleaner approach?
   Author: Harsh J , 2014-01-30, 06:15
Configuring hadoop 2.2.0 - Hadoop - [mail # user]
...I don't believe what you've been told is correct (IIUC). HDFS is an independent component and does not require presence of YARN (or MR) to function correctly.  What do you exactly mean ...
   Author: Harsh J , 2014-01-29, 10:08
Force one mapper per machine (not core)? - Hadoop - [mail # user]
...Is your cluster running MR1 or MR2? On MR1, the CapacityScheduler would allow you to do this if you used appropriate memory based requests (see, and o...
   Author: Harsh J , 2014-01-29, 08:52
performance of "hadoop fs -put" - Hadoop - [mail # user]
...Are you calling one command per file? That's bound to be slow as it invokes a new JVM each time. On Jan 29, 2014 7:15 AM, "Jay Vyas"  wrote:  > Im finding that "hadoop fs -put" ...
   Author: Harsh J , 2014-01-29, 02:22
memory management module of Namenode - Hadoop - [mail # user]
...Hi,  The central class is downwards. I'd advise drilling down from the NameNodeRpcServer sources at
   Author: Harsh J , 2014-01-28, 11:00
BlockMissingException reading HDFS file, but the block exists and fsck shows OK - Hadoop - [mail # user]
...Can you check the log of the DN that is holding the specific block for any errors? On Jan 27, 2014 8:37 PM, "John Lilley"  wrote:  >  I am getting this perplexing error. &n...
   Author: Harsh J , 2014-01-27, 15:14