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Re: How to get JobTracker metrics from Hadoop via JMX - Hadoop - [mail # user]
...The current stable 0.20 does not export JMX metrics for the JobTracker :(  However you can get at these stats via the JobClient. I have done this to produce graphs like the one shown be...
   Author: Edward Capriolo, 2010-04-14, 13:57
Re: How to kill orphaned hadoop job through web UI - Hadoop - [mail # user]
...On Mon, Apr 12, 2010 at 1:17 PM, Keith Wiley  wrote:   hadoop job -list  Kill it with: hadoop job -kill  ...
   Author: Edward Capriolo, 2010-04-12, 17:22
Re: Hadoop overhead - Hadoop - [mail # user]
...On Thu, Apr 8, 2010 at 10:51 AM, Patrick Angeles wrote:   All jobs make entries in a jobhistory directory on the task tracker. As of now the jobhistory directory has some limitations wi...
   Author: Edward Capriolo, 2010-04-08, 15:28
Re: Password less ssh from slave to slave - Hadoop - [mail # user]
...On Mon, Mar 8, 2010 at 8:50 AM, Massoud Mazar  wrote: Yes and No. (Mostly no) The hadoop components have their own protocol.  Password-less SSH is  used to by start-all.sh com...
   Author: Edward Capriolo, 2010-03-08, 18:34
Re: Security issue: hadoop fs shell bypass authentication? - Hadoop - [mail # user]
...The upcoming security will work with kerberos. actions like running a map reduce job will involve getting a kerberos ticket and passing it along. I have dodged kerberos for a long time and n...
   Author: Edward Capriolo, 2010-03-07, 02:46
[expand - 1 more] - Re: Pipelining data from map to reduce - Hadoop - [mail # user]
...I guess if you emmitted the key as task-id+ key you would have more overhead but if the data "replayed" the reducer could detect dups.  Ed  On 3/4/10, Scott Carey  wrote:...
   Author: Edward Capriolo, 2010-03-05, 01:26
Re: Will interactive password authentication fail talk between namenode-datanode/jobtracker-tasktracker? - Hadoop - [mail # user]
...On Thu, Mar 4, 2010 at 2:01 PM, Edson Ramiro  wrote: ) n knew   Adding an entry to DNS adds the entry to your forward and reverse lookup table, thus fixing/hiding the problem. Host...
   Author: Edward Capriolo, 2010-03-04, 21:23
Re: Hbase VS Hive - Hadoop - [mail # user]
...On Thu, Mar 4, 2010 at 12:13 PM, Fitrah Elly Firdaus  wrote: Hive and Hbase are very different. I am basically doing a rehash of what some people have said above with my own thoughts. I...
   Author: Edward Capriolo, 2010-03-04, 17:40
Re: should data be evenly distributed to each (physical) node - Hadoop - [mail # user]
...On Thu, Mar 4, 2010 at 10:25 AM, openresearch  wrote:  The distribution of data on each datanode will not be exactly even, however blocks should be located on different boxes. Chec...
   Author: Edward Capriolo, 2010-03-04, 15:47
[expand - 1 more] - Re: "lost task" suspect Distributed Cache to blame - Hadoop - [mail # user]
...On Tue, Mar 2, 2010 at 6:55 PM, Allen Wittenauer  wrote:  with a  They are data files not jars. They are a few GB each. Today the process ran but a couple tasks got this... &n...
   Author: Edward Capriolo, 2010-03-03, 21:16
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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