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Re: backup of hdfs data - MapReduce - [mail # user]
...Conventional enterprise backup systems are rarely scaled for hadoop needs.  Both bandwidth and size are typically lacking.    My employer, Mapr, offers a hadoop-derived distri...
   Author: Ted Dunning, 2012-11-06, 00:47
Re: Set the number of maps - MapReduce - [mail # user]
...Is the spelling of the option correct?  On Thu, Nov 1, 2012 at 6:43 AM, Cogan, Peter (Peter)  wrote:  ust...
   Author: Ted Dunning, 2012-11-01, 16:50
Re: ClientProtocol create、mkdirs 、rename and delete methods are not Idempotent - MapReduce - [mail # user]
...Create cannot be idempotent with sequential files.  Doing the same create twice creates two different files.  On Sun, Oct 28, 2012 at 10:25 PM, lei liu  wrote:  ...
   Author: Ted Dunning, 2012-10-29, 05:58
Re: Cluster wide atomic operations - MapReduce - [mail # user]
...On Sun, Oct 28, 2012 at 9:15 PM, David Parks  wrote  s n,  Having such a limited range may require that you have a central service to generate ID's.  The use of a central...
   Author: Ted Dunning, 2012-10-29, 05:58
Re: rules engine with Hadoop - MapReduce - [mail # user]
...That probably means that your problem is pretty easy.  Just code up a standard rules engine into a mapper.  You can also build a user defined function (UDF) in Pig or Hive and Hado...
   Author: Ted Dunning, 2012-10-21, 02:07
Re: DFS respond very slow - MapReduce - [mail # user]
...Uhhh... Alexey, did you really mean that you are running 100 mega bit per second network links?  That is going to make hadoop run *really* slowly.  Also, putting RAID under any DFS...
   Author: Ted Dunning, 2012-10-16, 02:23
Re: Suitability of HDFS for live file store - MapReduce - [mail # user]
...If you are going to mention commercial distros, you should include MapR as well.  Hadoop compatible, very scalable and handles very large numbers of files in a Posix-ish environment. &n...
   Author: Ted Dunning, 2012-10-15, 22:17
Re: Spindle per Cores - MapReduce - [mail # user]
...I think that this rule of thumb is to prevent people configuring 2 disk clusters with 16 cores or 48 disk machines with 4 cores.  Both configurations could make sense in narrow applicat...
   Author: Ted Dunning, 2012-10-12, 20:52
Re: Logistic regression package on Hadoop - MapReduce - [mail # user]
...Harsh,  THanks for the plug.  Rajesh has been talking to us.  On Fri, Oct 12, 2012 at 8:36 AM, Harsh J  wrote:  ...
   Author: Ted Dunning, 2012-10-12, 17:21
Re: Hadoop/Lucene + Solr architecture suggestions? - MapReduce - [mail # user]
...Your mileage will vary.  I find that this exact motion is what makes reduce side indexing very attractive since it allows precise sharding control.  On Thu, Oct 11, 2012 at 10:20 P...
   Author: Ted Dunning, 2012-10-12, 05:23
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