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[expand - 4 more] - Re: Juggling or swaping out the standby NameNode in a QJM / HA configuration - Hadoop - [mail # user]
...We've done this a number of times without issue.  Here's the general flow:1) Shutdown namenode and zkfc on SNN2) Stop zkfc on ANN  (ANN will remain active because there is no other...
   Author: Bryan Beaudreault, 2014-07-31, 20:13
Re: HBase metadata - Hadoop - [mail # user]
...At HubSpot we write all of our own code using the normal Java API forScans, Gets, etc.  We built a lightweight internal framework around this toenforce some standards.Some people also u...
   Author: Bryan Beaudreault, 2014-07-08, 17:06
Re: Plans of moving towards JDK7 in trunk - Hadoop - [mail # dev]
...As one of the customers you guys have referenced a few times, I 100% agreewith Colin. :)We had to wait a few years for java7 to be supported for hadoop, orcertified at least.  It would ...
   Author: Bryan Beaudreault, 2014-06-20, 18:11
Re: For QJM HA solution, after failover, application must update NameNode IP? - Hadoop - [mail # user]
...If you are using the QJM HA solution, the IP addresses of the namenodesshould not change.  Instead your clients should be connecting using theproper HA configurations.  That is, yo...
   Author: Bryan Beaudreault, 2014-04-29, 13:58
Re: block location - Hadoop - [mail # user]
...Correct, do not use the hadoop balancer on a cluster serving HBase data. Let HBase handle it at the region level.To recover locality, you will need to run major compactions of the affec...
   Author: Bryan Beaudreault, 2014-03-28, 01:45
Re: Force one mapper per machine (not core)? - Hadoop - [mail # user]
...If this cluster is being used exclusively for this goal, you could just setthe mapred.tasktracker.map.tasks.maximum to 1.On Tue, Jan 28, 2014 at 5:00 PM, Keith Wiley  wrote: ...
   Author: Bryan Beaudreault, 2014-01-28, 22:10
Re: HDFS question - Hadoop - [mail # user]
...Do you have a jobtracker?  Without a jobtracker and tasktrackers, distcp isrunning in LocalRunner mode.  I.E. it is running a single-threaded processon the local machine.  The...
   Author: Bryan Beaudreault, 2014-01-28, 16:52
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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