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Re: How to disable secondary node - Hadoop - [mail # user]
...It is a bad idea to permanently disable 2nn. The edits file grows very very large and will not be processed until the name node restart. We had a 12GB edit file that took 40 minutes of downt...
   Author: Edward Capriolo, 2010-09-09, 14:59
Re: SequenceFile Header - Hadoop - [mail # user]
...On Wed, Sep 8, 2010 at 1:06 PM, Matthew John  wrote:  Are you trying to write sequence files by yourself? That is not the suggested way.  You should write your sequence files ...
   Author: Edward Capriolo, 2010-09-08, 17:26
Re: Re: namenode consume quite a lot of memory with only serveral hundredsof files in it - Hadoop - [mail # user]
...The fact that the memory is high is not necessarily a bad thing. Faster garbage collection implies more CPU usage.  I had some success following the tuning advice here, to make my memor...
   Author: Edward Capriolo, 2010-09-08, 01:34
Re: Why does Generic Options Parser only take the first -D option? - Hadoop - [mail # user]
...On Thu, Sep 2, 2010 at 2:29 PM, Ted Yu  wrote: rote: a" )){ va:46) 65) ava:145)  Thanks Ted,  I think the problem is if you run a a program stand alone, inside an IDE, and not...
   Author: Edward Capriolo, 2010-09-03, 15:03
Re: DataDrivenInputFormat setInput with boundingQuery - Hadoop - [mail # user]
...On Tue, Aug 31, 2010 at 10:32 PM, Edward Capriolo  w rote: ormat.class); class); s); class); ); ap.tasks", 2); ql.jdbc.Driver", l://localhost:3306/test", null, null); DBWritable.class, ...
   Author: Edward Capriolo, 2010-09-01, 03:06
Re: accounts permission on hadoop - Hadoop - [mail # user]
...On Tue, Aug 31, 2010 at 5:07 PM, Gang Luo  wrote:  Currently hadoop gets its user groups from the posix user/groups.  Your default home directory would be /user/smith. Directo...
   Author: Edward Capriolo, 2010-08-31, 21:43
Re: what will happen if a backup name node folder becomes unaccessible? - Hadoop - [mail # user]
...On Fri, Aug 27, 2010 at 8:30 PM, jiang licht  wrote: er for dfs.name.dir is not available when a name node starts... ssible? ats the dir1 out 4; zing doop roup e: e: e: e: e: e: e: e e ...
   Author: Edward Capriolo, 2010-08-28, 01:08
Re: how to revert from a new version to an older one (CDH3)? - Hadoop - [mail # user]
...On Tue, Aug 24, 2010 at 1:36 PM, jiang licht  wrote: 2+320) to a previous release of CDH3 (0.20.2+228). The problem is that ther e is no installation package for previous release of CDH...
   Author: Edward Capriolo, 2010-08-24, 18:05
Re: Hadoop startup problem - directory name required - Hadoop - [mail # user]
...On Mon, Aug 23, 2010 at 12:09 PM, cliff palmer  wrot e: e y , he e: dfsname d is ed e value> doop e> e>  Check the permissions of the paths above this one. Make sure paren...
   Author: Edward Capriolo, 2010-08-23, 16:12
Re: Configure Secondary Namenode - Hadoop - [mail # user]
...2010/8/18 xiujin yang : rtOpt artOpt secondarynamenode ode start secondarynamenode  dfs.http.address defaults to something like localhost:50070 If you start a secondary name node on a s...
   Author: Edward Capriolo, 2010-08-23, 02:30
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