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memory usage tasks - Hadoop - [mail # user]
...silly question, but i have our hadoop slave boxes configured with 7 mappers each, yet i see java 14 process for user mapred on each box. and each process takes up about 2GB, which is equals ...
   Author: Koert Kuipers, 2012-06-09, 00:49
[expand - 1 more] - Re: kerberos mapreduce question - Hadoop - [mail # user]
...thanks for your answer.  so at a large place like say yahoo, or facebook, assuming they use kerberos, every analyst that uses hive has an account on every node of their large cluster? s...
   Author: Koert Kuipers, 2012-06-07, 14:49
dual power for hadoop in datacenter? - Hadoop - [mail # user]
...what are the thoughts on running a hadoop cluster in a datacenter with respect to power? should all the boxes have redundant power supplies and be on dual power? or just dual power for the n...
   Author: Koert Kuipers, 2012-01-07, 19:23
1gig or 10gig network for cluster? - Hadoop - [mail # user]
...For a hadoop cluster that starts medium size (50 nodes) but could grow to hundred of nodes, what is the recommended network in the rack? 1gig or 10gig We have machines with 8 cores, 4 X 1tb ...
   Author: Koert Kuipers, 2011-12-23, 17:23
How to take a datanode down temporarily - Hadoop - [mail # user]
...How do i take a machine down that is a datanode without causing the namenode to start fixing the under-replication? Say i need to fix something on the machine that will take 30 mins, and aft...
   Author: Koert Kuipers, 2011-08-27, 23:04
hp sl servers with hadoop? - Hadoop - [mail # user]
...Does anyone have any experience using HP Proliant SL hardware for hadoop? We are currently using DL 160 and DL 180 servers, and the SL hardware seems to fit the bill for our new servers in m...
   Author: Koert Kuipers, 2011-08-24, 14:42
[expand - 1 more] - Re: Question about RAID controllers and hadoop - Hadoop - [mail # user]
...Hey Charles, I was considering using 8 drives, each set as RAID0, so its good to hear such a setup is working for you. Best Koert  On Thu, Aug 11, 2011 at 6:26 PM, Charles Wimmer wrote:...
   Author: Koert Kuipers, 2011-08-12, 00:11
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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