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Hadoop-2.0.5-alpha IO test - MapReduce - [mail # user]
...Hi All     I want to test my hdfs IO  within  Hadoop-2.0.5-alpha .    I use the the jar:hadoop-hdfs-2.0.5-alpha-tests.jar in the /hadoop-2.0.5-alpha/share/hadoo...
   Author: YouPeng Yang, 2013-08-16, 03:33
stop-dfs.sh does not work - MapReduce - [mail # user]
...Hi users.      I start my HDFS by using :start-dfs.sh. And add the node start successfully. However the stop-dfs.sh dose not work when I want to stop the HDFS. It shows : no n...
   Author: YouPeng Yang, 2013-07-10, 05:30
Re: reply: a question about dfs.replication - MapReduce - [mail # user]
...HI HU and Yu      Aggree with dfs.replication is a client side configuration, not server side. It make the point in my last mail  sense.      And the cmd:h...
   Author: YouPeng Yang, 2013-07-02, 04:52
Re: 答复: 答复: a question about dfs.replication - MapReduce - [mail # user]
...Hi Hu     It comes an point in my mind.And I tested it.     Before you set the dfs.replication to 2,the block may have already existed with the original replication value...
   Author: YouPeng Yang, 2013-07-02, 04:41
DirectoryScanner's OutOfMemoryError - MapReduce - [mail # user]
...Hi All     I have found that the DirectoryScanner gets error:  Error compiling report because of java.lang.OutOfMemoryError: Java heap space.   The log details are as [1]...
   Author: YouPeng Yang, 2013-06-07, 15:03
what is the Interval of BlockPoolSliceScanner. - MapReduce - [mail # user]
...Hi all     I find that when datanode startup it will run BlockPoolSliceScanner to verificate the BP.   What is the Interval  of BlockPoolSliceScanner, and when does the B...
   Author: YouPeng Yang, 2013-06-07, 14:56
Exception comes out with the override option in CompositeInputFormat - MapReduce - [mail # user]
...Hi All   I‘m trying the CompositeInputFormat to perform the Map-side join。 The outer and inner join go well. However I try the override option .It come out an exception[1]:    ...
   Author: YouPeng Yang, 2013-05-19, 08:44
FileNotFoundException When DistributedCache file with YARN - MapReduce - [mail # user]
...HI   I adopt distributed cache  to implement the semi-joins.  I am using CDH4.1.2   the Map side setup  function is as [1]:   It works well in my eclipse indigo...
   Author: YouPeng Yang, 2013-05-13, 08:35
issues with decrease the default.block.size - MapReduce - [mail # user]
...hi ALL       I am going to setup a new hadoop  environment, .Because  of  there are lots of small  files, I would  like to change  the  defa...
   Author: YouPeng Yang, 2013-05-09, 15:42
Re: Relations ship between HDFS_BYTE_READ and Map input bytes - MapReduce - [mail # user]
...Hi Pralabh *   *  1.The Map input bytes couter belongs to the MapReduce FrameWork. The hadoop defintive explains that:    The number of bytes of uncompressed input consum...
   Author: YouPeng Yang, 2013-04-30, 10:33
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YouPeng Yang
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