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Re: Pragmatic cluster backup strategies? - Hadoop - [mail # user]
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...Yes you will have redundancy, so no single point of hardware failure can wi pe out your data, short of a major catastrophe. But you can still have an errant or malicious "hadoop ...
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Author: Robert Evans,
2012-05-29, 17:02
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Re: contributing as student - Hadoop - [mail # dev]
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...Also be aware that a lot of us are very busy, so sadly you may need to send mail to the appropriate mailing list if your patch is not reviewed quickly . On 5/29/12 4:32 AM, "Dev...
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Author: Robert Evans,
2012-05-29, 15:12
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Re: Stream data processing - Hadoop - [mail # user]
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...If you want the results to come out instantly Map/Reduce is not the proper choice. Map/Reduce is designed for batch processing. It can do small batc hes, but the overhead o...
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Author: Robert Evans,
2012-05-22, 13:52
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Re: Stream data processing - Hadoop - [mail # user]
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...Zhiwei, How quickly do you have to get the result out once the new data is added? How far back in time do you have to look for BBBB from the occurrence of bb bb? Do you ha...
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Author: Robert Evans,
2012-05-21, 21:07
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Re: Transfer archives (or any file) from Mapper to Reducer? - Hadoop - [mail # user]
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...Be careful putting them in HDFS. It does not scale very well, as the numbe r of file opens will be on the order of Number of Mappers * Number of Reduc ers. You can quickly do a d...
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Author: Robert Evans,
2012-05-21, 18:39
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Re: Need Urgent Help on Architecture - Hadoop - [mail # dev]
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...All attachments are stripped when sent to the mailing list. You will need to use another service if you want us to see the diagram. On 5/18/12 12:50 PM, "samir das mohapat...
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Author: Robert Evans,
2012-05-21, 18:10
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Re: Oozie vs. YARN "application" - Hadoop - [mail # general]
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...Keith, The documentation is incorrect. The plan is to be able to support such a t hing, but it has not been implemented yet. I would like to see it be part of the cor...
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Author: Robert Evans,
2012-05-18, 05:11
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Re: [VOTE] Release hadoop-2.0.0-alpha-rc1 - Hadoop - [mail # general]
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...+1 I downloaded the binary ran a single node cluster and kicked the tires a bit with a few MR jobs. Everything worked. On 5/15/12 9:20 PM, "Arun C Murthy" wrote: &nb...
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Author: Robert Evans,
2012-05-16, 07:04
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Re: freeze a mapreduce job - Hadoop - [mail # user]
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...There is an idle timeout for map/reduce tasks. If a task makes no progress for 10 min (Default) the AM will kill it on 2.0 and the JT will kill it on 1.0. But I don't...
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Author: Robert Evans,
2012-05-11, 15:58
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Re: Sailfish - Hadoop - [mail # dev]
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...That makes perfect sense to me. Especially because it really is a new impl ementation of shuffle that is optimized for very large jobs. I am happy to see anything go in tha...
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Author: Robert Evans,
2012-05-11, 14:29
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