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question about speed up the hdfs balancer - Hadoop - [mail # user]
...hi,maillist:          i want to balancer for my HDFS cluster ,but the default speed is1M/s , i want to set the option dfs.balance.bandwidthPerSec  to 20M/s...
   Author: ch huang, 2014-11-17, 09:05
[expand - 1 more] - issue about pig can not know HDFS HA configuration - Hadoop - [mail # user]
...hi,maillist:   i set namenode HA in my HDFS cluster,but seems pig can not know it ,why?2014-11-05 14:34:54,710 [JobControl] INFO org.apache.hadoop.mapreduce.JobSubmitter - Cle...
   Author: ch huang, 2014-11-05, 09:22
issue about submit job to local ,not to cluster - Hadoop - [mail # user]
...hi,maillist:       my cluster move from one IDC to another IDC ,when all done ,i runjob ,and find the job run on local box not on cluster ,why? it is normal onold IDC!&nb...
   Author: ch huang, 2014-10-21, 06:48
[expand - 3 more] - how to copy data between two hdfs cluster fastly? - Hadoop - [mail # user]
...hi,maillist:             i now use distcp to migrate data from CDH4.4 to CDH5.1 , ifind when copy small file,it very good, but when transfer big data ,it v...
   Author: ch huang, 2014-10-17, 08:59
issue about namenode start slow - Hadoop - [mail # user]
...hi,maillist:      my hadoop cluster lost power last weekend ,when i restart my namenode,i find it get info from journalnode ,and do transaction again ,but i seeit very sl...
   Author: ch huang, 2014-09-22, 02:59
issue about let a common user run application on YARN (with kerberose) - Hadoop - [mail # user]
...hi,maillist:       i use kerberos to do auth for my hadoop cluster, i have a 3-nodecluster(HDFS& YARN)z1.example.com (NN,RM)z2.example.com (NM,DN)z3.example.com (NM,DN,pr...
   Author: ch huang, 2014-09-16, 06:39
Datanode can not start with error "Error creating plugin: org.apache.hadoop.metrics2.sink.FileSink" - Hadoop - [mail # user]
...hi,maillist:   i have a 10-worknode hadoop cluster using CDH 4.4.0 , one of my datanode,one of it's disk is full, when i restart this datanode ,i get errorSTARTUP_MSG:   java ...
   Author: ch huang, 2014-09-04, 03:09
issue about hadoop data migrate between IDC - Hadoop - [mail # user]
...hi,maillist:               my company signed a new IDC ,i must move the hadoopdata(about 30T data) to new IDC,any good suggestion? ...
   Author: ch huang, 2014-08-07, 01:14
[expand - 1 more] - issue about distcp " Source and target differ in block-size. Use -pb to preserve block-sizes during copy." - Hadoop - [mail # user]
...hi,maillist:           i try to copy data from my old cluster to new cluster,i geterror ,how to handle this?14/07/24 18:35:58 INFO mapreduce.Job: Task Id :attem...
   Author: ch huang, 2014-07-25, 01:15
[expand - 3 more] - issue about run MR job use system user in CDH5 - Hadoop - [mail # user]
...hi,maillist:        i set up CDH5 yarn cluster ,and set the following option in mymapred-site.xml file               &nb...
   Author: ch huang, 2014-07-22, 06:15
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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