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How to force the replication ? - Hadoop - [mail # general]
...Hi all I change the replication of file by using command : bin/hadoop setrep But when I use fsck to check the status of the file, it always shows that the one replica of this file is missing...
   Author: Jeff Zhang, 2010-06-07, 05:34
[expand - 1 more] - Re: Setting up a second cluster and getting a weird issue - Hadoop - [mail # user]
...It is not suggested to deploy hadoop on NFS, there will be conflict between data nodes, because NFS share the same namespace of file system.    On Thu, May 13, 2010 at 9:52 PM, And...
   Author: Jeff Zhang, 2010-05-14, 01:51
[expand - 1 more] - Re: How to recover hadoop cluster using SecondaryNameNode ? - Hadoop - [mail # user]
...Allen,  Do you mean HDFS-976  and HDFS-966  ?    On Fri, May 14, 2010 at 1:32 AM, Allen Wittenauer  wrote: have undergone any review outside of Facebook. :( &nb...
   Author: Jeff Zhang, 2010-05-14, 01:39
Re: submit multiple jobs simultaneously - Hadoop - [mail # user]
...The returned object of JobClient.submitJob(JobConf job) is RunningJob. You can get the job status through this object.    2010/5/12 Gang Luo :  counters, etc. How can I get th...
   Author: Jeff Zhang, 2010-05-12, 15:46
Re: Questions about SequenceFiles - Hadoop - [mail # user]
...I think this is a bug, writable object should have default no-argument constructor.   On Tue, May 11, 2010 at 7:20 AM, Ananth Sarathy  wrote: om onf); yClass()); ueClass()); ection...
   Author: Jeff Zhang, 2010-05-11, 14:31
Re: Fully distribute TextInputFormat... - Hadoop - [mail # user]
...What's the format of this file ? gzip can been split.    On Mon, May 10, 2010 at 5:21 AM, Pierre ANCELOT  wrote y ?    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-05-10, 12:52
Re: where job executed - Hadoop - [mail # user]
...Do you mean where each task run ? You can look at the job tracker web ui where you can find each job's status and info.    On Mon, May 10, 2010 at 3:16 AM, Alan Miller  wro te...
   Author: Jeff Zhang, 2010-05-10, 01:06
Re: Logging from the job - Hadoop - [mail # user]
...you should use the log4j rather than the apache common logging  On Tue, Apr 27, 2010 at 4:52 PM, Alexander Semenov  wrote:    Best Regards  Jeff Zhang...
   Author: Jeff Zhang, 2010-04-27, 09:07
Re: Hadoop overhead - Hadoop - [mail # user]
...By default, for each task hadoop will create a new jvm process which will be the major cost in my opinion. You can customize configuration to let tasktracker reuse the jvm to eliminate the o...
   Author: Jeff Zhang, 2010-04-08, 14:37
Re: Distributed hadoop setup 0 live datanode problem in cluster - Hadoop - [mail # user]
...Can you post your namenode's log ? It seems that your data node can not connect to the name node.  On Wed, Mar 17, 2010 at 2:43 PM, William Kang wrote:     Best Regards  ...
   Author: Jeff Zhang, 2010-03-17, 07:14
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB