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Re: Where to find a list of most Hadoop2 config file parameters? - Hadoop - [mail # user]
...Hey Bill,Most of the documented parameters can be found under theyarn-default.xml and mapred-default.xml with their descriptions:http://hadoop.apache.org/docs/stable2/hadoop-yarn/hadoop-yarn...
   Author: Harsh J, 2014-02-05, 09:11
Re: 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
Re: 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] - Re: 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
[expand - 1 more] - Re: 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
Re: Capture Directory Context in Hadoop Mapper - Hadoop - [mail # user]
...Hi,These posts are nicely written - thanks for sharing! Have you alsotaken a look at the MultipleInputs feature, which gives you a cleanerapproach? http://hadoop.apache.org/docs/stable2/api/...
   Author: Harsh J, 2014-01-30, 06:16
Re: Configuring hadoop 2.2.0 - Hadoop - [mail # user]
...I don't believe what you've been told is correct (IIUC). HDFS is anindependent component and does not require presence of YARN (or MR) tofunction correctly.What do you exactly mean when you ...
   Author: Harsh J, 2014-01-29, 10:09
Re: performance of "hadoop fs -put" - Hadoop - [mail # user]
...Are you calling one command per file? That's bound to be slow as it invokesa new JVM each time.On Jan 29, 2014 7:15 AM, "Jay Vyas"  wrote: ...
   Author: Harsh J, 2014-01-29, 02:22
Re: memory management module of Namenode - Hadoop - [mail # user]
...Hi,The central class is FSNamesystem.java downwards. I'd advise drillingdown from the NameNodeRpcServer sources athttps://github.com/apache/hadoop-common/blob/trunk/hadoop-hdfs-project/hadoo...
   Author: Harsh J, 2014-01-28, 11:01
Re: 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 anyerrors?On Jan 27, 2014 8:37 PM, "John Lilley"  wrote: ...
   Author: Harsh J, 2014-01-27, 15:26
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB