To put in other words, Is there a problem that can be solved by directly defining your map reduce jobs, but for which you cannot form a Hive QL query?
I am just trying to evaluate HBase for some of data analysis stuff we are doing. HBase would contain our event data. Key would be eventId + time. We want to run analysis on few events types (4-5) be
What开发者_运维百科 happens when the datanode the map/reduce is using goes down? Shouldnt the job be redirected to another datanode? How should my code handle this exceptional condition?If datanode go
I am trying to compute an average value from a collection using the mongodb java driver, like this: DBObject condition =
As we need to read in bunch of files to mapper, in non-Hadoop environment, I use os.walk(dir) and file=open(path, mode) to read in
I have a nested JSON object for the key status below: { \"2011-01-19 09:41:00 AM\": \"Prototyping status application\",
Can anyone please explain the concept of map-reduce, particularly in Mongo? I also use C# so any specifics in that are开发者_如何学编程a would also be useful.One way to understand Map-Reduce coming f
I recently started to use Hadoop and I have a problem while using a Mapfile as a input to a MapReduce job.
Is there a way to use the relation name in MapReduce\'s Map and Reduce? I am trying to do Set difference using Hadoop\'s MapReduce.
I\'m trying to run a Map-Reduce job on Hadoop Streaming with Python scripts and getting the same errors as Hadoop Streaming Job failed error in python but those solutions didn\'t work for me.
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