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[HADOOP-8791] rm "Only deletes non empty directory and files." - Hadoop - [issue]
...The documentation (1.0.3) is describing the opposite of what rm does.It should be  "Only delete files and empty directories."With regards to file, the size of the file should not matter...
http://issues.apache.org/jira/browse/HADOOP-8791    Author: Bertrand Dechoux, 2014-09-04, 00:18
Re: Data cleansing in modern data architecture - Hadoop - [mail # user]
...Well, keeping bad data has its use too. I assume you know about temporaldatabase.Back to your use case, if you only need to remove a few records from HDFSfiles, the easiest might be during t...
   Author: Bertrand Dechoux, 2014-08-10, 15:05
Re: Hadoop Realtime Queries - Hadoop - [mail # user]
...It all depends on the context and what is really meant by realtime. Impala(and other concurrent alternatives) are not listed among the tools you havetried.Maybe you should not focus only on ...
   Author: Bertrand Dechoux, 2014-07-31, 07:58
[expand - 3 more] - Re: Skippin those gost darn 0 byte diles - Hadoop - [mail # user]
...For reference : https://issues.apache.org/jira/browse/SPARK-1960(which seems highly related)I don't know if anything is tracked on Hadoop/MapReduce side.Bertrand DechouxOn Wed, Jul 23, 2014 ...
   Author: Bertrand Dechoux, 2014-07-25, 14:05
[expand - 3 more] - Re: Replace a block with a new one - Hadoop - [mail # user]
...And there is actually quite a lot of information about it.https://github.com/facebook/hadoop-20/blob/master/src/contrib/raid/src/java/org/apache/hadoop/hdfs/DistributedRaidFileSystem.javahtt...
   Author: Bertrand Dechoux, 2014-07-21, 19:48
Re: what exactly does data in HDFS look like? - Hadoop - [mail # user]
...But basically you are right : it is the same concept as with a classicalfile system. A file is seen as a sequence of bytes. For various efficiencyreasons, the whole sequence is not stored li...
   Author: Bertrand Dechoux, 2014-07-19, 11:35
Re: Providing a file instead of a directory to a M/R job - Hadoop - [mail # user]
...No reason why not. And a permission explains why there is an error :missing access rights....Bertrand DechouxOn Thu, Jul 17, 2014 at 4:58 PM, Shahab Yunus wrote: ...
   Author: Bertrand Dechoux, 2014-07-17, 15:23
Re: Evaluation of cost of cluster - Hadoop - [mail # user]
...Hi,The mail is now nicely formated but I would suggest you take the time todigest answers from the same question you already asked twice.https://www.mail-archive.com/search?l=user%40hadoop.a...
   Author: Bertrand Dechoux, 2014-07-17, 09:50
Re: changing split size in Hadoop configuration - Hadoop - [mail # user]
...For what it's worth, mapreduce.jobtracker.split.metainfo.maxsize is relatedto the size of the file containing the information describing the inputsplits. It is not related directly to the vo...
   Author: Bertrand Dechoux, 2014-07-14, 18:55
Re: Muliple map writing into same hdfs file - Hadoop - [mail # user]
...And beside with a single file, if that were possible, how do you handleerror? Let' say task 1 ran 3 times : 1 error, 1 speculative and 1success... A per-task file has been a standard to easi...
   Author: Bertrand Dechoux, 2014-07-11, 05:20
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