I\'m trying to run a hadoop job (version 18.3) on my windows machine but I get the following error: Caused by: javax.security.auth.login.LoginException: Login failed: CreateProcess: bash -c groups er
Update: follow-up to MongoDB Get names of all keys in collection. As pointed out by Kr开发者_开发百科istina, one can use Mongodb \'s map/reduce to list the keys in a collection:
I\'ve written a MapReduce in MongoDB and would like to use a global variable as a cache to write to/read from. I know it is not possible to have global variables across map function instances - I just
I want to implement Fast Fourier Transform algorithm with Hadoop. I know recursive-fft algorithm but I need your guideline in order to impleme开发者_如何转开发nt it Map/Reduce approach. Any suggestion
I have a code fragment in which I am using a static code block to initialize a variable. public static class JoinMap extends
I have started a maven project trying to implement the MapReduce algorithm in java 1.5.0_14. I have chosen the 0.20.2 API hadoop version. In the pom.xml i\'m using thus the following dependency:
i have algorithm that will go through a large data set read some text files and search for specific terms in those lines. I have it implemented in Java, but I didnt want to post code so that it doesnt
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All of the MongoDB MapReduce examples I have seen have dealt with counting/adding numbers. I need to combine strings, and it looks like MapReduce is the best tool for the job. I have a large MongoDB c
I\'m a mathematician and occasionally do some statistics/machine learning analysis consulting projects on the side开发者_开发问答. The data I have access to are usually on the smaller side, at most a
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