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Re: Connect to HDFS running on a different Hadoop-Version - Hadoop - [mail # user]
...Insight is a IBM related product, based on an fork of hadoop I think.  The mixing of totally different stacks make no sense. And will not work,  I guess.  - Alex   Alexan...
   Author: alo alt, 2012-01-25, 12:32
Re: Task process exit with nonzero status of 134 - Hadoop - [mail # user]
...Anthony,  personally I haven't tested yet, jdk7 have bugs already. Was only a hint to see if the error occurs. I would focus on memory issues, the installed RAM are okay? No errors? My ...
   Author: alo alt, 2011-12-27, 14:07
Re: MapReduce job failing when a node of cluster is rebooted - Hadoop - [mail # user]
...Did the DN you've just rebooted connecting to the NN? Mostly the datanode daemon is'nt running, check it: ps waux |grep "DataNode" |grep -v "grep"  - ALex  On Tue, Dec 27, 2011 at ...
   Author: alo alt, 2011-12-27, 13:55
Re: 1gig or 10gig network for cluster? - Hadoop - [mail # user]
...Hi,  recommend or optimum? 10G are the best for optimal rackawareness. If you plan to grow up seriously, start with the best you can effort. Depends on your available investment, I thin...
   Author: alo alt, 2011-12-23, 18:44
Re: measuring network throughput - Hadoop - [mail # user]
...Yes, I know ;) You can grab and extend the metrics as you like. Here a post from Sematext: http://blog.sematext.com/2011/07/31/extending-hadoop-metrics/  - Alex  On Thu, Dec 22, 20...
   Author: alo alt, 2011-12-22, 13:52
Re: Hadoop configuration - Hadoop - [mail # user]
...Hi,  Apache: http://hadoop.apache.org/common/docs/current/cluster_setup.html  RHEL / CentOS: http://mapredit.blogspot.com/p/get-hadoop-cluster-running-in-20.html  Ubuntu: http...
   Author: alo alt, 2011-12-22, 09:47
Re: Regarding a Multi user environment - Hadoop - [mail # user]
...Hi,  if I understood correctly, you want other users than root can stop / start an entire cluster? Its possible via sudoers (visudo). Create a group, insert the users (must be exists on...
   Author: alo alt, 2011-12-18, 11:01
Re: Dynamically adding nodes in Hadoop - Hadoop - [mail # user]
...Hi,  in the slave - file too. /etc/hosts is also recommend to avoid DNS issues. After adding in slaves the new node has to be started and should quickly appear in the web-ui. If you don...
   Author: alo alt, 2011-12-17, 11:40
Re: Choosing IO intensive and CPU intensive workloads - Hadoop - [mail # user]
...Hi Arun,  In hadoop-*test*.jar we have a lot testcases, could any of them match yours? #> cd /usr/lib/hadoop-0.20/ && hadoop jar hadoop-*test*.jar  - Alex    On Fri, D...
   Author: alo alt, 2011-12-09, 10:22
Re: "Warning: $HADOOP_HOME is deprecated" - Hadoop - [mail # user]
...Hi,  looks like a bug in .205: https://issues.apache.org/jira/browse/HADOOP-7816  - Alex  On Wed, Dec 7, 2011 at 11:37 AM, praveenesh kumar wrote:     Alexander Lore...
   Author: alo alt, 2011-12-07, 10:41
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