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number of parallel scans? - Impala - [mail # user]
...Hi, In Impala is a select also translated into a number of parallel HBase scans like in Phoenix? How is the number of scans determined? Can a user configure it? Are there some rules of thumb...
   Author: Yuzhang Han, 2014-04-25, 03:02
[expand - 2 more] - Re: "could only be replicated to 0 nodes instead of minReplication" exception during job execution - MapReduce - [mail # user]
...Omkar, by the way, I see following exception in my nodemanager log. Do you think it is related?  2013-06-24 16:15:48,039 INFO org.apache.hadoop.yarn.service.AbstractService: Service:org...
   Author: Yuzhang Han, 2013-06-25, 04:15
[expand - 2 more] - Re: How is the memory usage of containers controlled? - HDFS - [mail # user]
...Arun, thank you for the tips. I viewed LinuxResourceCalculatorPlugin. I think it calculates the  resource usage of a node, since it parses the log files under /proc/.  But on a sin...
   Author: Yuzhang Han, 2013-06-24, 03:27
Different container sizes for MR tasks, job does not complete - HDFS - [mail # user]
...Hi,  I am using MapReduce on YARN. I want to make tasks of the same job run  in containers with different sizes. For example: Job1 = . Task1 := 1280 MB; Task2 to 8  := 1024 MB...
   Author: Yuzhang Han, 2013-06-14, 20:05
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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