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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
Re: Lazy initialization of Reducers - Hadoop - [mail # general]
...I don't find such parameter in 0.20.2  Please create such flag in your own class.  On Wed, Jul 21, 2010 at 10:15 AM, Syed Wasti  wrote:  the B hod...
   Author: Ted Yu, 2010-07-21, 17:38
Re: Hadoop and XML - Hadoop - [mail # general]
...I also added Peter's comment to the JIRA I logged: https://issues.apache.org/jira/browse/HADOOP-6868  On Tue, Jul 20, 2010 at 9:38 AM, Ted Yu  wrote:  ...
   Author: Ted Yu, 2010-07-20, 16:50
Re: Killed : GC overhead limit exceeded - Hadoop - [mail # user]
...That's what I suggested. You can actually declare tabPattern, etc static variables of your Mapper class. You can also lower -Xmx to give other processes on the same node more memory.  C...
   Author: Ted Yu, 2010-07-18, 19:06
Re: Exception in thread "main" java.lang.ClassNotFoundException in Hadoop - Hadoop - [mail # general]
...I assume you have used jar command to confirm that org.myorg.WordCount is i n wordcount.jar  On Mon, Jul 12, 2010 at 10:59 PM, james isaac wr ote:  y...
   Author: Ted Yu, 2010-07-14, 20:08
Re: Hadoop Streaming (with Python) and Queue's - Hadoop - [mail # user]
...If you're using capacity scheduler, see: http://hadoop.apache.org/common/docs/r0.20.2/capacity_scheduler.html#Setting+up+queues  The queues can be checked through job tracker web UI und...
   Author: Ted Yu, 2010-07-14, 17:37
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