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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
[expand - 1 more] - Re: Data-local map tasks lower than Launched map tasks even with full replication - Hadoop - [mail # user]
...This is a very non-typical node for hadoop clusters.  8 cores is not that uncommon, but normally nodes have only 2 disks.  The rationale for a small number of spindles per machine ...
   Author: Ted Dunning, 2009-07-18, 00:09
Re: map side Vs. Reduce side join - Hadoop - [mail # user]
...One not-so-obvious instance of a map-side join is in term cooccurrence analysis for documents.  This is essentially a join of the document to term relation to itself.  Of course, t...
   Author: Ted Dunning, 2009-07-17, 07:03
Re: Looking for counterpart of Configure Method - Hadoop - [mail # user]
...I don't know what you mean by that.  The guarantee is that each mapper object will have close called and that map will never be called after close is called.  On Tue, Jul 14, 2009 ...
   Author: Ted Dunning, 2009-07-14, 18:43
Re: Disk configuration. - Hadoop - [mail # user]
...Be very cautious with spaces (i.e. don't use them)  On Mon, Jul 13, 2009 at 12:38 PM, Scott Carey wrote:     Ted Dunning, CTO DeepDyve  111 West Evelyn Ave. Ste. 202 Sunn...
   Author: Ted Dunning, 2009-07-13, 19:55
[expand - 1 more] - Re: Accessing static variables in map function - Hadoop - [mail # user]
...And NEVER expect updates to these variables to work like you think.  On Thu, Jul 9, 2009 at 8:24 PM, jason hadoop  wrote:  ...
   Author: Ted Dunning, 2009-07-10, 18:37
Re: Limit the number of open files in MultipleTextOutputFormat - Hadoop - [mail # user]
...On Fri, Jul 10, 2009 at 1:16 AM, Marcus Herou wrote:    Generally having lots of small files is very bad for performance.  It sounds like you are headed that direction.  ...
   Author: Ted Dunning, 2009-07-10, 17:06
Re: How to make data available in 10 minutes. - Hadoop - [mail # user]
...You are basically re-inventing lots of capabilities that others have solved before.  The idea of building an index that refers to files which are constructed by progressive merging is v...
   Author: Ted Dunning, 2009-07-09, 20:05
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB