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Re: Discrepancy in the values of consumed disk space by hadoop - HDFS - [mail # user]
...There isn't a "discrepancy", but read on: DFS Used counts disk spaces across DNs. FSCK counts file lengths on HDFS. The former includes replicated data sizes, plus block checksum metadata co...
   Author: Harsh J, 2013-08-09, 14:04
Re: Why LineRecordWriter.write(..) is synchronized - HDFS - [mail # user]
...I suppose I should have been clearer. There's no problem out of box if people stick to the libraries we offer :)  Yes the LRW was marked synchronized at some point over 8 years ago [1] ...
   Author: Harsh J, 2013-08-09, 01:46
Re: load properties from property file into Configuration object - HDFS - [mail # user]
...This is a bit unnecessary to manually do. If you use the Tool framework, then you can pass -Dkey=val props directly into a config object at runtime. See http://hadoop.apache.org/docs/stable/...
   Author: Harsh J, 2013-08-03, 12:20
Re: some questions about HA and secondary name node - HDFS - [mail # user]
...Hi,  On Wed, Jul 31, 2013 at 7:03 AM, ch huang  wrote:  With HA setup, you do not need to run the SecondaryNameNode daemon.   The Standby state NameNode automatically beh...
   Author: Harsh J, 2013-07-31, 02:18
Re: Suspecting Namenode Filesystem Corrupt!! - HDFS - [mail # user]
...What do you mean by you "can't get back a result"? The command hangs, errors out, gives an incorrect result, what does it do? Can you post your error please? On Jul 30, 2013 1:31 AM, "Sathis...
   Author: Harsh J, 2013-07-30, 02:42
Re: Error on running a hadoop job - HDFS - [mail # user]
...You could see this if you had removed away /wordcount_raw/ when the reducer was running perhaps. Otherwise the path had an attempt ID so am not seeing how it could have had two writers confl...
   Author: Harsh J, 2013-07-29, 18:19
Re: problem about starting datanode - HDFS - [mail # user]
...You have one datanode data volume (dfs.datanode.data.dir) configured, but you've specified tolerated failures as 3. The state of 3 > 1 is invalid and hence the error. You cannot enable di...
   Author: Harsh J, 2013-07-26, 05:48
Re: issure about create fence method - HDFS - [mail # user]
...The fencing happens at the NameNodes, so I guess just on the two NNs should suffice.  On Fri, Jul 26, 2013 at 6:26 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:02
Re: issure about config namenode HA - HDFS - [mail # user]
...If you have already configured QJM for NN's edits storage, then yes, it needs to be available.  On Fri, Jul 26, 2013 at 8:24 AM, ch huang  wrote:    Harsh J...
   Author: Harsh J, 2013-07-26, 03:00
[HDFS-3302] Review and improve HDFS trash documentation - HDFS - [issue]
...Improve Trash documentation for users.(0.23 published release docs are missing original HDFS docs btw...)A set of FAQ-like questions can be found on HDFS-2740I'll update the ticket shortly w...
http://issues.apache.org/jira/browse/HDFS-3302    Author: Harsh J, 2013-07-25, 21:37
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