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courses:mapreduce-tutorial:step-29 [2012/01/30 00:52] straka |
courses:mapreduce-tutorial:step-29 [2012/01/30 00:53] straka |
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| * if the offset of the split is 0, start reading at the beginning of the split. If the offset of the split is larger than 0, start reading at the offset and ignore first paragraph found. | * if the offset of the split is 0, start reading at the beginning of the split. If the offset of the split is larger than 0, start reading at the offset and ignore first paragraph found. | ||
| * read all paragraphs that start before the end of the split boundary, even if they end after the split boundary. //If a paragraph starts just after the current split (i.e., on the split boundary), read it too.// | * read all paragraphs that start before the end of the split boundary, even if they end after the split boundary. //If a paragraph starts just after the current split (i.e., on the split boundary), read it too.// | ||
| + | It is simple to verify that with these rules, all paragraphs are read exactly once. | ||