I have a CouchApp that functions like a social network. I have a like button which, when clicked by a user, creates and saves a CouchDB JSON document with the fields post_id (the ID of the post that w
Whenever I am trying to use Java class files as my mapper and/or reducer I am getting the following error:
I\'m looking for a way to loa开发者_StackOverflow中文版d an entire file text into my map.Not a single line at a time like TextInputFormat does.
Part 1: I have (student) collection: { sname : \"\", studentId: \"123\" age: \"\", gpa: \"\", } im trying to get only two keys from it :
I am working on map reduce program and was thinking about designing computations of the form where a1, b1 are the values associated with a key
I\'m struggling to get a firm grasp of how map reduce works and when to use it. I\'m getting some random results that just isn\'t making sense, but maybe my understanding of mapreduce in wrong?
just wondering what 开发者_JS百科does the following command means? so hard to google topics related to pig:
Is there any place where i can find how to configure hadoop eclipse plugin which comes with hadoop down开发者_高级运维load.?
I am currently working on a MapReduce Job which I am only using the mapper without the reducer. I do not need to write the key out because I only need the values which are stored in an array and want
I need to do some heavy machine learning computations. I have a small number of machines idle on a LAN. How many machines would I need in order for distrubuting my computations using hadoop / mapreduc
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