Quoting http://www.m开发者_如何学运维ongodb.org/display/DOCS/MapReduce#MapReduce-Parallelism As of right now, MapReduce jobs on a
I am newbie to MapReduce and Java programming. I am trying to get taskid of each map() function. Basically I need to use taskid of each mapper as offset for fetching some data from a common file.
As the title says. I was reading Yet Another Language Geek: Continuation-Passing Style and I was sort of wondering if MapReduce can be categorized as one form o开发者_C百科f Continuation-Passing Style
a bit of a binary question (okay, not excatly) - but was wondering if one is able to configure cloudera / hadoop to run at the nodes without root shell access to the n开发者_StackOverflow社区ode compu
Passing messages around with actors is great. But I would like to have even easier code. Examples (Pseudo-code)
I\'ve been trying to use Hadoop to send N amount of lines to a single mapping. I don\'t require for the lines to be split already.
I\'m looking for help deciding on which database system to use.(I\'ve been googling and reading for the past few hours; it now seems worthwhile to ask for help from someone with firsthand knowledge.)
I have MySQL database, where I store the following BLOB (which contains JSON object) and ID (for this JSON object). JSON object contains a lot of different information. Say, \"city:Los Angeles\" and \
Is it correct to say that the parallel computation with iterative MapReduce can be justified mainly when the training data size is too large for the non-parallel computation for the sa开发者_开发知识库
How do you execute a Unix shell comma开发者_JAVA技巧nd (e.g awk one liner) on a cluster in parallel (step 1) and collect the results back to a central node (step 2)?
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