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courses:mapreduce-tutorial:step-2 [2012/01/25 00:32] straka |
courses:mapreduce-tutorial:step-2 [2012/01/28 10:27] majlis |
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====== MapReduce tutorial : Input and output format, testing data. ====== | ====== MapReduce tutorial : Input and output format, testing data. ====== | ||
- | The MapReduce framework is frequently using (key, value) pairs. These | + | The MapReduce framework is frequently using (key, value) pairs. These pairs can be read from a file and written to a file and there are several formats available. |
- | pairs can be read from a file and written to a file and there are several formats available. | + | |
===== Input formats ===== | ===== Input formats ===== | ||
- | * '' | + | * '' |
- | * '' | + | * '' |
- | * '' | + | * '' |
The input format can be compressed and will be decompressed transparently by the MR framework. | The input format can be compressed and will be decompressed transparently by the MR framework. | ||
===== Output formats ===== | ===== Output formats ===== | ||
- | * '' | + | * '' |
- | * '' | + | * '' |
The output format can be compressed on demand. | The output format can be compressed on demand. | ||
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* ''/ | * ''/ | ||
* ''/ | * ''/ | ||
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