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Re: command to start and stop balancer? - Hadoop - [mail # user]
...start-balancer.sh calls 'start balancer' They have same effect.  On Tue, Aug 24, 2010 at 12:13 PM, jiang licht  wrote:  ...
   Author: Ted Yu, 2010-08-24, 19:20
Re: add new data node failed: incompatible build version (CDH3) - Hadoop - [mail # user]
...CDH 0.20.2+320 isn't compatible with 0.20.2+228 You need to upgrade whole cluster.  On Mon, Aug 23, 2010 at 2:00 PM, jiang licht  wrote:  ...
   Author: Ted Yu, 2010-08-23, 21:06
Re: what "role" should I assign the weakest node in a hadoop cluster - Hadoop - [mail # user]
...It depends on how weak this node is because NameNode is SPOF.  On Thu, Aug 19, 2010 at 2:13 PM, Alejandro Montenegro w rote:  ...
   Author: Ted Yu, 2010-08-19, 22:22
Re: How to get job configuration from external source - Hadoop - [mail # user]
...Check $HADOOP_HOME/logs directory where you can find: job_201008102250_0035_conf.xml  job_201008102250_0092_conf.xml  ...  On Thu, Aug 12, 2010 at 10:58 AM, patek tek  wr...
   Author: Ted Yu, 2010-08-12, 18:35
Re: Data World Record Falls as Computer Scientists Break Terabyte Sort Barrier - Hadoop - [mail # general]
...Maybe this would give us a little more incentive to resolve HDFS-347  Cheers  On Mon, Aug 2, 2010 at 1:50 PM, Abhishek Verma wrote:  ...
   Author: Ted Yu, 2010-08-04, 03:02
Re: How to make Hadoop listen on multiple network interfaces ? - Hadoop - [mail # user]
...Hadoop uses DNS lookup to associate IP with hostname.  It would be better if you follow the rack concept and have a ToR (Top of Rack) switch which allows for port bonding.  See HBA...
   Author: Ted Yu, 2010-07-30, 22:40
Re: mapred.userlog.retain.hours - Hadoop - [mail # user]
...Have you restarted your cluster ?  You can actually specify this parameter in JobConf. See the usage:         TaskLog.cleanup(job.getInt("mapred.userlog.retain.hours...
   Author: Ted Yu, 2010-07-29, 20:53
Re: error:Caused by: java.lang.ClassNotFoundException: com.hadoop.compression.lzo.LzopCodec - Hadoop - [mail # user]
...Yes.  On Thu, Jul 29, 2010 at 7:57 AM, Alex Luya  wrote  nux- /lib/tools.jar:/usr/local/hadoop/hadoop-0.20.2/bin/..:/usr/local/hadoop/had oop-0.20.2/bin/../hadoop-0.20.2- ing-...
   Author: Ted Yu, 2010-07-29, 16:11
Re: what affects number of reducers launched by hadoop? - Hadoop - [mail # user]
...The 3 stages for reducer are: copy sort reduce  On Wed, Jul 28, 2010 at 12:24 PM, Vitaliy Semochkin wrote:  ...
   Author: Ted Yu, 2010-07-28, 19:33
Re: empty input - Hadoop - [mail # user]
...No. There is no InputSplit generated from them.  On Mon, Jul 26, 2010 at 12:37 PM, Gang Luo  wrote:  ...
   Author: Ted Yu, 2010-07-26, 19:47
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