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[expand - 1 more] - Re: can the parameters dfs.block.size and dfs.replication be different from one file to the other - MapReduce - [mail # user]
...Hello Shahab,  Thanks for the reply. Typically, to invoke the HDFS client, I will use "bin/haddop dfs ...". But the command that you used "hadoop fs ...". makes me wonder what this is t...
   Author: Jun Li, 2013-09-10, 20:13
whether dfs.domain.socket.path is supported in Hadoop 1.1? - MapReduce - [mail # user]
...Hi,  In the link, http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,   the explanation: dfs.domain.socket.path  is that:  "Optional. ...
   Author: Jun Li, 2013-09-10, 18:30
How to build Hadoop from source using Ant - MapReduce - [mail # user]
...Hello,  I have downloaded from the Apache web site the Hadoop.1.1.2, the current stable version.  Then I simply used the command of:  ant -Dcompile-core=true  to try to b...
   Author: Jun Li, 2013-07-13, 10:37
[expand - 3 more] - Re: how to turn on NativeIO.posixFadviseIfPossible - HDFS - [mail # user]
...Hi Leo,  Following your instruction on moving the sections in configure.ac, I am able to re-compile the code base and I can find that the "objdump" returns the correct fadvise symbols a...
   Author: Jun Li, 2013-06-24, 06:23
write-ahead log and failure recovery for region servers - HBase - [mail # user]
...Hi,  I am in the middle of performance testing on my service using HBase as the backend, and I have difficulty to explain the write and read performance difference, which bring up the f...
   Author: Jun Li, 2010-07-14, 17:15
[expand - 1 more] - Re: How to specify HBase cluster end-points from HBase client code in HBase 0.20.0 - HBase - [mail # user]
...Hi JD,  Do you know how to make it work for the 0.20.5, the latest version, as I am planning to upgrade my installation from HBase0.20.0 to HBase0.20.5 anyway?  Jun   On Wed, ...
   Author: Jun Li, 2010-07-07, 20:44
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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