I\'m using my reducers to input data into MySQL. My concern is that in some cases, multiple reducers are launched for the same key simultaneously. In that case, there is a chance that the DB could be
In my application I want to create as many reducer jobs as possible based on the keys. Now my current implementation writes all the keys and values in a single (reducer) output file. So to solve this,
(I\'m sure a similar question exists, but I haven\'t found the answer I\'m looking for yet.) I\'m using Hadoop and Hive (for our developers with SQL familiarity) to batch process multiple terabytes
I have a 3 node hadoop setup, with replication factor as 2. When one of my datanode dies, namenode waits for 10 mins before removing it from live nodes. Till then my hdfs writes 开发者_运维百科fail s
Hadoop n00b here, just started playing around with Hadoop Pipes. I\'m getting linker errors while compiling a simple WordCount example using hadoop-0.20.203 (current most recent version) that did not
When I migrated to Scala 2.9.0 from 2.8.1, all of the code was functional except for the Hadoop mappers.Because I had some wrapper objects in the way, I distilled down to the following example:
I need to do a MapReduce application in Java, that need to be auto-recursive, that means for each line of input file processed it must check all the lines of the input/Map entries for a condition, ve
I\'m using hadoop to update some records in a mysql db... The issue that I\'m seeing is that in certain cases, multiple reducers are launched for the same key set.
I am having problem getting map/reduce example to work on cygwin: http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/
I\'ve just installed hadoop and hbase from cloudera (3) but when I try to go to http://localhost:60010 it just sits there continually loading.
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