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courses:mapreduce-tutorial [2012/01/25 22:03] straka |
courses:mapreduce-tutorial [2012/01/28 20:16] straka |
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=== MapReduce extended === | === MapReduce extended === |
From now on, it is best to run MR jobs using a one-machine cluster. Running the scripts locally without any cluster has several disadvantages, most notably having only one reducer per job. | From now on, it is best to run MR jobs using a one-machine cluster -- create a one-machine cluster using ''hadoop-cluster'' for 3h (10800s) and run jobs using ''-jt cluster_master''. Running the scripts locally without any cluster has several disadvantages, most notably having only one reducer per job. |
* [[.:mapreduce-tutorial:Step 8]]: Multiple mappers, reducers and partitioning. | * [[.:mapreduce-tutorial:Step 8]]: Multiple mappers, reducers and partitioning. |
* [[.:mapreduce-tutorial:Step 9]]: Hadoop properties. | * [[.:mapreduce-tutorial:Step 9]]: Hadoop properties. |
* [[.:mapreduce-tutorial:Step 13]]: Sorting | * [[.:mapreduce-tutorial:Step 13]]: Sorting |
* [[.:mapreduce-tutorial:Step 14]]: N-gram language model | * [[.:mapreduce-tutorial:Step 14]]: N-gram language model |
* [[.:mapreduce-tutorial:Step 15]]: K-means algorithm | * [[.:mapreduce-tutorial:Step 15]]: K-means clustering |
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| ===== Day 2 ===== |
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| Today we will be using the [[http://hadoop.apache.org/common/docs/r1.0.0/api/index.html|Java API]]. |
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| === Environment === |
| * [[.:mapreduce-tutorial:Step 21]]: Preparing the environment. |
| * [[.:mapreduce-tutorial:Step 22]]: Optional -- Setting Eclipse. |
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| === Java Hadoop basics ==== |
| * [[.:mapreduce-tutorial:Step 23]]: Predefined formats and types. |
| * [[.:mapreduce-tutorial:Step 24]]: Mappers, running Java Hadoop jobs. |
| * [[.:mapreduce-tutorial:Step 25]]: Reducers, combiners and partitioners. |
| * [[.:mapreduce-tutorial:Step 26]]: Counters and job configuration. |
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| === Advanced topics === |
| * [[.:mapreduce-tutorial:Step 27]]: Custom data types |
| * [[.:mapreduce-tutorial:Step 28]]: Custom input formats |
| * [[.:mapreduce-tutorial:Step 29]]: Running multiple Hadoop jobs |
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===== Other ===== | ===== Other ===== |
* [[user:majlis:hadoop|Further information]] | * [[user:majlis:hadoop|Further information]] |
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