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Re: reference architecture - MapReduce - [mail # user]
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...On 25 October 2012 20:24, Daniel Käfer wro te: I quite like the new Hadoop in Practice for a lot of that, especially the answer to #2, "how to store the data", where he looks at...
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Author: Steve Loughran,
2012-10-25, 21:10
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Re: HDFS HA IO Fencing - MapReduce - [mail # user]
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...On 25 October 2012 14:08, Todd Lipcon wrote: on any OS running in any virtual environment, including EC2, time is entirely unpredictable, just to make things worse. On a s...
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Author: Steve Loughran,
2012-10-25, 18:23
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Re: Large input files via HTTP - MapReduce - [mail # user]
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...data ingress is often done as an initial MR job. Here is sounds like you'd need -a list of URLs, which you can have a single mapper run through and map to (hostname,url) wh...
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Author: Steve Loughran,
2012-10-22, 08:47
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Re: HDFS using SAN - MapReduce - [mail # user]
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...On 18 October 2012 16:46, Zhani Pellumbi wrote: That's an interesting article -though I came out confused. Where it talks about "HDFS protocol", what I think it means is th...
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Author: Steve Loughran,
2012-10-19, 08:06
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Re: Question about namenode HA - MapReduce - [mail # user]
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...On 15 October 2012 04:01, 谢良 wrote: I don't know the answer to that, except I do know that you are usually best a monitoring the state of a process externally, as liveness is de...
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Author: Steve Loughran,
2012-10-15, 10:16
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Re: Reading Sequence File from Hadoop Distributed Cache .. - MapReduce - [mail # user]
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...On 11 October 2012 20:53, Mark Olimpiati wrote: gives you the default FS for that process, which can be different. what about FileSystem.get("file://tmp",new Configu...
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Author: Steve Loughran,
2012-10-12, 18:27
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Re: Why they recommend this (CPU) ? - MapReduce - [mail # user]
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...On 11 October 2012 20:47, Goldstone, Robin J. wrote: mmm. There is more $L3, and in-CPU sync can be done better than over the inter-socket bus -you're also less vulnerable to NUM...
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Author: Steve Loughran,
2012-10-12, 08:19
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Re: How to change topology - MapReduce - [mail # user]
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...On 9 October 2012 16:51, Shinichi Yamashita wrote: That's right. There's been lots of discussion on adding live topology resetting. There's also a large unfinished JIRA in...
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Author: Steve Loughran,
2012-10-09, 19:17
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Re: How to change topology - MapReduce - [mail # user]
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...On 8 October 2012 14:23, Shinichi Yamashita wrote: no, it's the Namenode and JobTracker that needs to be restarted; they are the bits that care where the boxes are. ...
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Author: Steve Loughran,
2012-10-09, 08:22
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Re: Cumulative value using mapreduce - MapReduce - [mail # user]
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...On 5 October 2012 06:50, Ted Dunning wrote: since 2008, if I'm not mistaken...
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Author: Steve Loughran,
2012-10-05, 14:43
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