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Re: Deleted data - Hive - [mail # user]
...Hi,When you create tables in Hive, there are two options: external and managedtables, which deal with data on HDFS differently.Managed tables - when you load data, Hive copies or moved the f...
   Author: Ana Gillan, 2014-09-02, 15:25
[expand - 2 more] - Re: Optimising Map and Reduce numbers for Compressed Dataset - Hive - [mail # user]
...Thanks so much, Nishant!I set the mapreduce.input.fileinputformat.split.maxsize as you suggested andthe queries spawned more mappers, which made the job finish significantlyquicker! (For any...
   Author: Ana Gillan, 2014-08-13, 19:36
org.apache.hadoop.security.AccessControlException: Permission denied: user=yarn, access=EXECUTE - Hadoop - [mail # user]
...Hi,I ran a job in Hive and it got to this stage: Stage-1 map = 100%,  reduce =29%, seemed to start cleaning up the containers and stuff successfully, andthen I got this series of errors...
   Author: Ana Gillan, 2014-08-12, 10:28
ulimit for Hive - Hadoop - [mail # user]
...Hi,I¹ve been reading a lot of posts about needing to set a high ulimit for filedescriptors in Hadoop and I think it¹s probably the cause of a lot of theerrors I¹ve been having when trying to...
   Author: Ana Gillan, 2014-08-11, 22:17
[expand - 1 more] - Re: YARN Application Master Question - Hadoop - [mail # user]
...Thanks very much, Mirko!-AnaOn 6 August 2014 12:00, Mirko Kämpf  wrote: ...
   Author: Ana Gillan, 2014-08-06, 11:11
[expand - 5 more] - Re: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException) - Hadoop - [mail # user]
...Hi,Unfortunately, after I set my user¹s ulimit ­n to  65536, I still get thesame bad performance, killed containers and errors as before.I collected together a bunch of logs around the ...
   Author: Ana Gillan, 2014-08-04, 11:53
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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