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[expand - 1 more] - Re: Counting no. of keys. - Hadoop - [mail # user]
...If you need the number of token occurrences, then counters work well.  If you need the number unique tokens, then you need a separate map reduce.   On Mon, Aug 3, 2009 at 6:01 AM, ...
   Author: Ted Dunning, 2009-08-04, 14:25
Re: conf.setNumReduceTasks(1) but the code called 3 times - Hadoop - [mail # user]
...Another rule of thumb is to avoid side effects!  On Thu, Jul 30, 2009 at 7:54 AM, Jason Venner wrote:     Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-07-30, 16:33
[expand - 3 more] - Re: Map performance with custom binary format - Hadoop - [mail # user]
...Don't remember exactly.  I do know that they are faster, especially if the NIC is already saturated.  On Tue, Jul 28, 2009 at 1:59 PM, Erik Paulson  wrote:      ...
   Author: Ted Dunning, 2009-07-28, 22:15
Re: Why is single reducer called twice? - Hadoop - [mail # user]
...Not safely.  But you can use the close() method to do the same thing.  On Mon, Jul 27, 2009 at 8:21 AM, Mark Kerzner  wrote:     Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-07-28, 05:33
Re: [VOTE] Push back code freeze for 0.21 - Hadoop - [mail # dev]
...October?  On Fri, Jul 24, 2009 at 5:11 PM, Eric Baldeschwieler wrote:      Ted Dunning, CTO DeepDyve...
   Author: Ted Dunning, 2009-07-25, 00:16
[expand - 3 more] - Re: Remote access to cluster using user as hadoop - Hadoop - [mail # user]
...Interesting approach.  My guess is that this would indeed protect the datanodes from accidental "attack" by stopping access before they are involved.  You might also consider just ...
   Author: Ted Dunning, 2009-07-24, 00:52
Re: Current security implementation in Hadoop - Hadoop - [mail # dev]
...Your architecture is a bit unusual in that you seem to be proposing that users get direct access to the hadoop storage layer.  More common is to have a controller layer that mediates re...
   Author: Ted Dunning, 2009-07-23, 18:11
Re: Testing Mappers in Hadoop 0.20.0 - Hadoop - [mail # user]
...To amplify David's point, why is the argument a Mapper.Context rather than MapContext?  Also, why is the Mapper.Context not static?  On Wed, Jul 22, 2009 at 5:29 PM, David Hall &nb...
   Author: Ted Dunning, 2009-07-23, 01:24
Re: drbl for hadoop - Hadoop - [mail # user]
...An OS doesn't take much disk and doesn't require many operations.  The key segregation that you might like to do is separating local intermediate storage from hadoop data.  Separat...
   Author: Ted Dunning, 2009-07-21, 17:13
[expand - 2 more] - Re: Hardware Manufacturer - Hadoop - [mail # user]
...There are already several such efforts.  Pig has PigMix  Hadoop has terasort and likely some others as well.  On Tue, Jul 21, 2009 at 3:14 AM, Steve Loughran  wrote: &nbs...
   Author: Ted Dunning, 2009-07-21, 15:28
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