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[expand - 1 more] - Re: Should splittable Gzip be a "core" hadoop feature? - Hadoop - [mail # user]
...If many people are going to use it then by all means put it in.  If there i s only one person, or a very small handful of people that are going to use  it then I personally would p...
   Author: Robert Evans, 2012-02-29, 18:13
[expand - 1 more] - Re: Execute a Map/Reduce Job Jar from Another Java Program. - Hadoop - [mail # dev]
...It looks like there is something wrong with your configuration where the de fault file system is coming back as the local file system, but you are pass ing in an HDFS URI fs.exists(Path), I ...
   Author: Robert Evans, 2012-02-03, 17:12
Re: Why $HADOOP_PREFIX ? - Hadoop - [mail # user]
...I think it comes down to a long history of splitting and then remerging the  hadoop project.  I could be wrong about a lot of this so take it worth a g rain of salt.  Hadoop o...
   Author: Robert Evans, 2012-02-01, 17:01
Re: Hadoop 0.23 jars in mvn repo? - Hadoop - [mail # general]
...Hadoop 0.23 is still considered alpha quality.  I believe that is the reaso n why it is still in the snapshots repository.   On 1/31/12 11:31 PM, "Edward J. Yoon"  wrote: &nbs...
   Author: Robert Evans, 2012-02-01, 16:00
Re: When to use a combiner? - Hadoop - [mail # user]
...You can use a combiner for average.  You just have to write a separate comb iner from your reducer.  Class myCombiner {     //The value is sum/count pairs     v...
   Author: Robert Evans, 2012-01-25, 15:36
[expand - 1 more] - Re: Moving TB of data from NFS to HDFS - Hadoop - [mail # dev]
...Hadoop fs -put operates on a single thread at a time, and writes the data t o HDFS in order.  Depending on the connectivity between the filer/NFS serve r and the datanodes it may be dif...
   Author: Robert Evans, 2012-01-25, 15:03
Re: Hadoop PIPES job using C++ and binary data results in data locality problem. - Hadoop - [mail # user]
...I think what you want to try and do is to use JNI rather then pipes or stre aming.  PIPES has known issues and it is my understanding that its use is n ow discouraged.  The ideal w...
   Author: Robert Evans, 2012-01-10, 17:05
Re: increase number of map tasks - Hadoop - [mail # user]
...Similarly there is the NLineInputFormat that does this automatically.  If y our input is small it will read in the input and make a split for every N l ines of input.   Then you do...
   Author: Robert Evans, 2012-01-10, 14:57
Re: dual power for hadoop in datacenter? - Hadoop - [mail # user]
...Be aware that if half of your cluster goes down, depending of the version a nd configuration of Hadoop, there may be a replication storm, as hadoop tri es to bring it all back up to the prop...
   Author: Robert Evans, 2012-01-09, 16:50
Re: Security in 0.23 - Hadoop - [mail # dev]
...It should have all of the same security.  Some of it has been renamed, and  some of the token work is still on going.  The LinuxTaskController has been  renamed because "...
   Author: Robert Evans, 2012-01-04, 20:29
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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