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Hurray for NN sanity! Even Pre 2.x! - HDFS - [mail # dev]
...I work for a largish healthcare co.  We finally started using (exploiting?) Hadoop this year.  The day before our big, C-Suite sponsored launch of Hadoop celebration, we realized t...
   Author: Chris Embree, 2013-04-11, 04:24
Re: Linux io scheduler - HDFS - [mail # user]
...I assume your talking about the I/O scheduler.  Based on normal advice, only change this if you have a "smart" device between the OS and the Drives.  A SATA controller usually qual...
   Author: Chris Embree, 2013-04-02, 18:24
Re: Replication factor - HDFS - [mail # user]
...Aww..  You could've used lmgtfy.com :)  On Tue, Mar 12, 2013 at 4:57 PM, varun kumar  wrote:  ...
   Author: Chris Embree, 2013-03-12, 21:04
Re: About Hadoop Deb file - HDFS - [mail # user]
...Jokingly I want to say the problem is that you selected Ubuntu (or any other Debian based Linux) as your platform.  On a more serious note, if you are new to both Linux and Hadoop, you ...
   Author: Chris Embree, 2013-02-21, 05:02
Re: Release numbering for branch-2 releases - HDFS - [mail # dev]
...Hi Arun, et. al.,  I hope you don't mind a non-contributor butting in here.  I'm currently a Hadoop administrator and former application developer (non-hadoop).  regarding GA ...
   Author: Chris Embree, 2013-01-31, 01:52
Re: Maximum Storage size in a Single datanode - HDFS - [mail # user]
...You should probably think about this in a more cluster fashion.  A single node with a PB of data is probably not a good allocation of CPU : Disk ration.  In addition, you need enou...
   Author: Chris Embree, 2013-01-30, 11:52
Re: hdfs du periodicity and hdfs not respond at that time - HDFS - [mail # user]
...What type of FS are you using  under HDFS?  XFS, ext3, ext4?  The type and configuration of the underlying FS will impact performance. Most notably, ext3 has a lock-up effect ...
   Author: Chris Embree, 2013-01-24, 12:56
[HDFS-4327] Update documentation to more accurately describe Replication Pipelining - HDFS - [issue]
...A question was asked on the user list regarding data writes; do we write to disk then forward or do it async?  According to Dev. "The received write packet is directly socket-written to...
http://issues.apache.org/jira/browse/HDFS-4327    Author: Chris Embree, 2012-12-28, 00:10
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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