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Re: Splitting input file - increasing number of mappers - HDFS - [mail # user]
...More mappers will make it faster      U can try this parameter       mapreduce.input.fileinputformat.split.maxsize=      This will control the in...
   Author: Sanjay Subramanian, 2013-07-06, 15:18
Piping to HDFS (from Linux or HDFS) - HDFS - [mail # user]
...Hi guys  While I was trying to get some test data and configurations done quickly I realized one can do this and I think its super cool  Processing existing file on Linux/HDFS and ...
   Author: Sanjay Subramanian, 2013-06-24, 20:34
Many Errors at the last step of copying files from _temporary to Output Directory - HDFS - [mail # user]
...Hi  My environment is like this  INPUT FILES ========= 400 GZIP files , one from each server - average size gzipped 25MB  REDUCER ====== Uses MultipleOutput  OUTPUT  ...
   Author: Sanjay Subramanian, 2013-06-14, 16:28
Re: How to design the mapper and reducer for the following problem - HDFS - [mail # user]
...Hi  My quick and dirty non-optimized solution would be as follows  MAPPER ====== OUTPUT from Mapper                       &nb...
   Author: Sanjay Subramanian, 2013-06-14, 16:15
Re: Now give .gz file as input to the MAP - HDFS - [mail # user]
...Rahul-da  I found bz2 pretty slow (although splittable) so I switched to snappy (only sequence files are splittable but compress-decompress is fast)  Thanks Sanjay  From: Rahu...
   Author: Sanjay Subramanian, 2013-06-12, 17:43
Re: Problem in uploading file in WebHDFS - HDFS - [mail # user]
...Can u try one of the following  hdfs dfs -put localfile /path/to/dir/in/hdfs  hdfs dfs -copyFromLocal localfile /path/to/dir/in/hdfs  Thanks Sanjay.  Sent from my iPhone ...
   Author: Sanjay Subramanian, 2013-05-25, 15:50
[expand - 1 more] - Re: Where to begin from?? - HDFS - [mail # user]
...Hey guys  Is there a way to dynamically change the input dir and outputdir  I have the following CONSTANT directories in HDFS    *   /path/to/input/9999-99-99 (empty...
   Author: Sanjay Subramanian, 2013-05-24, 17:43
Re: Project ideas - HDFS - [mail # user]
...+1  My $0.02 is look look around and see problems u can solve…Its better to get a list of problems and see if u can model a solution using map-reduce framework  An example is as fo...
   Author: Sanjay Subramanian, 2013-05-21, 18:21
Re: Did any one used Hive on Oracle Metastore - HDFS - [mail # user]
...Raj It should be pretty much similar to setting it up in MySQL. Except any syntax differences. Read the cloudera hive installation notes. They have a separate Section for using mysql and ora...
   Author: Sanjay Subramanian, 2013-05-18, 20:30
Re: Hive on Oracle - HDFS - [mail # user]
...Try installing cloudera manager 4.1.2. It has bundled Hadoop hive and few other components.  I have this version in production. Cloudera has pretty good documentation. This way u don't ...
   Author: Sanjay Subramanian, 2013-05-18, 15:16
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