Cluster Computing and MapReduce Lecture 3
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Uploaded on Aug 28, 2007
Lecture 3: The Google File System. See
http://code.google.com/edu/content/su... for slides and other resources.
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All Comments (15)
Mike Beaubien 7 months ago
I don't like his reasoning for why the reducers can't start until all mappers are done.
You can't just dismiss it by saying that you should just run more mappers instead. The fact is, you're limiting the opportunities you have for // execution.
Also, it wouldn't complicate the reduce code to have to deal with map failures. If a box fails during map, just kill all the reduce tasks that have received map input from it and restart them. An optimistic approach like this would perform well I think.
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ForexReviewsCentral 1 year ago
a bit confusing...
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StroonsGlen 1 year ago
please! ayaw kalimti ang slide, pahingi, gamiton nako sa ako classe.
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exn666 1 year ago
бойан
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VondaFononono 1 year ago
The Google File System is not that complicated as we thought.
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tivrfoa 2 years ago
the link is broken
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Eido INOUE 4 years ago
Thanks for the clarifying his exact words.
However, NFS isn't POSIX *compliant* either. Open Group's XNFS specs explain how NFS semantics differs from POSIX/SUS in over 10 pages of detail.
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Eido INOUE 5 years ago
At the beginning of the lecture, he says that NFS is a POSIX file system. It isn't. I'm sure he just misspoke and meant to say that it's a networked file system popularly used with POSIX operating systems.
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