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Re: Problems with the Fedarated name node configuration - Hadoop - [mail # user]
...-          Do you see anything wrong in above configuration ?Looks like all right.-          Where am I supposed to run this ( on name nodes...
   Author: Yanbo Liang, 2014-08-16, 09:50
Re: Test read caching - Hadoop - [mail # user]
...You can check the response of your command.For example, you can execute "hdfs dfsadmin -report"and you will get reply like following  and can ensure the space of cacheused and remaining...
   Author: Yanbo Liang, 2014-08-15, 10:53
Re: OIV TOOL ERROR - Hadoop - [mail # user]
...Make sure you have same *hadoop-core*.jar* and all the librariesincluded in the Hadoop lib directory in the classpath.It looks like can not find the classorg.apache.hadoop.log.metrics.EventC...
   Author: Yanbo Liang, 2014-07-16, 11:37
Re: Not able to place enough replicas - Hadoop - [mail # user]
...Maybe the user 'test' has no privilege of write operation.You can refer the ERROR log like:org.apache.hadoop.security.UserGroupInformation: PriviledgedActionExceptionas:test (auth:SIMPLE)201...
   Author: Yanbo Liang, 2014-07-15, 02:59
Re: Request for a pointer to a MapReduce Program tutorial - Hadoop - [mail # user]
...May be you can reference >   2013/12/27 Sitaraman Vilayannur  ...
   Author: Yanbo Liang, 2013-12-27, 14:54
Re: Finding mean and median python streaming - Hadoop - [mail # user]
...Because each Reducer is just the local mean and median of the data which are shuffled to that Reducer.   2013/4/5 jamal sasha  ...
   Author: Yanbo Liang, 2013-04-06, 11:58
Re: Provide context to map function - Hadoop - [mail # user]
...protected void map(KEYIN key, VALUEIN value,                      Context context) throws IOException, InterruptedException {   &n...
   Author: Yanbo Liang, 2013-04-02, 07:48
Re: - Hadoop - [mail # user]
...You can get detail information from the Greenplum website: http://www.greenplum.com/products/pivotal-hd  2013/3/28 oualid ait wafli  ...
   Author: Yanbo Liang, 2013-03-28, 15:24
Re: FSEditLog won't log the change if one file size is changed? - Hadoop - [mail # user]
...The metadata did not include file size, so if client ask file size to the DataNode which stored the last block.  2013/1/17 Zheng Yong  ...
   Author: Yanbo Liang, 2013-01-18, 10:03
Re: which part of Hadoop is responsible of distributing the input file fragments to datanodes? - Hadoop - [mail # dev]
...I guess you means to set your own strategy of block distribution. If this, just hack the code as following clue: FSNamesystem.getAdditionalBlock() ---> BlockManager.chooseTarget()  -...
   Author: Yanbo Liang, 2012-11-15, 08:13
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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