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Re: Datanode disk considerations - Hadoop - [mail # user]
...Hadoop balancer doesn’t balance data on the local drives, it balances data between datanodes on the grid, so running the balancer won’t balance data on the local datanode.  The datanode...
   Author: Adam Faris, 2014-08-06, 21:24
Re: Is there any way to use a hdfs file as a Circular buffer? - Hadoop - [mail # user]
...If every device can send it's information as a 'event', you could use a publish-subscribe messaging system like Apache Kafka. (http://kafka.apache.org/)  Kafka is designed to self-manag...
   Author: Adam Faris, 2013-08-15, 18:16
Re: RES: I want to call HDFS REST api to upload a file using httplib. - Hadoop - [mail # user]
...Creating a file on HDFS is a multi-step process. If you allow me to generalize and skip over a lot of details, it's essentially a two step process.    1) ask the namenode for a loc...
   Author: Adam Faris, 2013-04-10, 22:39
Re: NN Memory Jumps every 1 1/2 hours - Hadoop - [mail # user]
...I know this will sound odd, but try reducing your heap size.   We had an issue like this where GC kept falling behind and we either ran out of heap or would be in full gc.  By redu...
   Author: Adam Faris, 2012-12-22, 04:59
Re: Which metrics to track? - Hadoop - [mail # user]
...ching hosts behind a load balancer as one needs to start thinking in terms  of distributed systems and not individual hosts.  The reason being that the  hadoop platform is fai...
   Author: Adam Faris, 2012-09-11, 02:31
[expand - 1 more] - Re: Best practice to migrate HDFS from 0.20.205 to CDH3u3 - Hadoop - [mail # user]
...Hi Austin,  I'm glad that helped out.  Regarding the -p flag for distcp, here's the onl ine documentation  http://hadoop.apache.org/common/docs/current/distcp.html#Option+Inde...
   Author: Adam Faris, 2012-05-08, 18:22
Re: [VOTE] Rename hadoop branches post hadoop-1.x - Hadoop - [mail # general]
...3, 4, 5, 2, 1 (non-binding)  On Mar 19, 2012, at 6:06 PM, Arun C Murthy wrote:  ole. months then we get option 1, else we get option 3. Effectively postpone dis cussion by 2 months...
   Author: Adam Faris, 2012-03-20, 15:07
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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