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Re: max 1 mapper per node - MapReduce - [mail # user]
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...Radim, You would want to modify the application master for this, and it is likely to be a bit of a hack because the RM scheduler itself is not really designe d for this. Yo...
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Author: Robert Evans,
2012-04-27, 15:30
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Re: max 1 mapper per node - MapReduce - [mail # user]
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...I do not believe that there is currently a way to do this. Do you want it so that the node can run only 1 mapper at a time but the nod e can also run multiple reducers at the same time...
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Author: Robert Evans,
2012-04-26, 18:07
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Re: Open the input file - MapReduce - [mail # user]
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...Hassen, You can supply your own custom input format to hadoop. If you look at the code for SleepJob it has a custom input format that does not require any in put files at a...
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Author: Robert Evans,
2012-04-19, 21:10
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Hadoop 3 precommit build issues - MapReduce - [mail # dev]
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...I did a very non-scientific study and it looks like hadoop 3 is having issu es with running the precommit build. It looks like some processes never di ed and are preventing the mini cl...
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Author: Robert Evans,
2012-04-13, 20:20
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Re: [RESULT] - [VOTE] Rename hadoop branches post hadoop-1.x - MapReduce - [mail # dev]
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...Steve, Todd is correct, we are running two yarn trains here at Yahoo. We are tryi ng to stabilize 0.23 and get it pushed out to production, while also workin g on stabilizing bra...
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Author: Robert Evans,
2012-04-12, 18:19
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Re: Streaming with custom input format - MapReduce - [mail # user]
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...Rebase the patch and upload it. It looked like it was fairly close. It is just such a big patch that it is hard to fully review it all. In a short t ime frame. And it...
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Author: Robert Evans,
2012-04-06, 13:58
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Re: Possible to poll JobTracker for information from any language? - MapReduce - [mail # user]
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...Ryan, Please don't cross post. On the 1.0 line I do not know of any way to get this information out for an y language but java. And even then it is simplest to use the hadoop cli...
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Author: Robert Evans,
2012-03-29, 15:32
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Re: Conf property: mapred.max.map.failures.percent - MapReduce - [mail # user]
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...It has been deprecated and changed to mapreduce.map.failures.maxpercent. I f you set the old one you will get a warning message saying to upgrade to t he new one, but the old one shoul...
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Author: Robert Evans,
2012-03-29, 14:49
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Re: Merge sorting reduce output files - MapReduce - [mail # user]
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...Niels, Sorry it has taken me so long to respond. Today has been a very crazy day. I am just guessing what your algorithm is for auto-complete. I really don' t know so...
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Author: Robert Evans,
2012-02-29, 23:07
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Re: Merge sorting reduce output files - MapReduce - [mail # user]
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...Niels, I am not sure I can help with that unless I know better what "a special dis tribution" means. Unless you are doing a massive amount of processing in your reducer ha...
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Author: Robert Evans,
2012-02-28, 22:28
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