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Re: Child processes on datanodes/task trackers - Hadoop - [mail # general]
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...After you obtain pid, you can use jstack to see what the Child process was doing. What hadoop version are you using ? On Wed, Aug 25, 2010 at 7:28 PM, C J wrote: ...
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Author: Ted Yu,
2010-08-26, 02:34
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Re: Child processes on datanodes/task trackers - Hadoop - [mail # general]
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...Use jps to find out pid of the Child. Then use this to find out which job the Child belongs to: ps aux | grep On Wed, Aug 25, 2010 at 12:20 PM, C J wrote: ...
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Author: Ted Yu,
2010-08-25, 23:17
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Re: quota? - Hadoop - [mail # user]
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...Refer to http://hadoop.apache.org/common/docs/r0.20.0/hdfs_quota_admin_guide.html#Space+Quotas On Wed, Aug 25, 2010 at 3:43 PM, jiang licht wrote: ...
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Author: Ted Yu,
2010-08-25, 22:47
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Re: command to start and stop balancer? - Hadoop - [mail # user]
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...start-balancer.sh calls 'start balancer' They have same effect. On Tue, Aug 24, 2010 at 12:13 PM, jiang licht wrote: ...
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Author: Ted Yu,
2010-08-24, 19:20
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Re: add new data node failed: incompatible build version (CDH3) - Hadoop - [mail # user]
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...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: ...
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Author: Ted Yu,
2010-08-23, 21:06
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Re: what "role" should I assign the weakest node in a hadoop cluster - Hadoop - [mail # user]
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...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: ...
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Author: Ted Yu,
2010-08-19, 22:22
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Re: How to get job configuration from external source - Hadoop - [mail # user]
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...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...
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Author: Ted Yu,
2010-08-12, 18:35
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Re: Data World Record Falls as Computer Scientists Break Terabyte Sort Barrier - Hadoop - [mail # general]
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...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: ...
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Author: Ted Yu,
2010-08-04, 03:02
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Re: How to make Hadoop listen on multiple network interfaces ? - Hadoop - [mail # user]
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...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...
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Author: Ted Yu,
2010-07-30, 22:40
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Re: mapred.userlog.retain.hours - Hadoop - [mail # user]
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...Have you restarted your cluster ? You can actually specify this parameter in JobConf. See the usage: TaskLog.cleanup(job.getInt("mapred.userlog.retain.hours...
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Author: Ted Yu,
2010-07-29, 20:53
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