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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "AmazonEC2" by smithhogg
Date Fri, 10 Jun 2011 21:21:31 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "AmazonEC2" page has been changed by smithhogg:
http://wiki.apache.org/hadoop/AmazonEC2?action=diff&rev1=75&rev2=76

  
  Clusters of Hadoop instances are created in a security group. Instances within the group
have unfettered access to one another. Machines outside the group (such as your workstation),
can only access instance on port 22 (for SSH), port 50030 (for the JobTracker's web interface,
permitting one to view job status), and port 50060 (for the TaskTracker's web interface, for
more detailed debugging).
  
- ('''Pre Hadoop 0.17''') These EC2 scripts require slave nodes to be able to establish SSH
connections to the master node (and vice versa). This is achieved after the cluster has launched
by copying the EC2 private key to all machines in the cluster.
+ ('''Pre Hadoop 0.17''') These EC2 scripts require slave nodes to be able to establish SSH
connections to the master node (and vice versa). This is achieved after the cluster has launched
by copying the EC2 private key to all machines in the cluster.[[http://www.essayhelppros.co.uk/uk-essay-writing.php|Essay
writing]]
  
  == Setting up ==
   * Unpack [[http://www.apache.org/dyn/closer.cgi/hadoop/core/|the latest Hadoop distribution]]
on your system (version 0.12.0 or later).
@@ -171, +171 @@

  
  === Building a customized Hadoop image ===
  
- If you want to build an image with a version of Hadoop that is not available from the Apache
distribution site (e.g. trunk, or a patched version) then you will need to alter the ''create-hadoop-image-remote''
script to retrieve and install your required version of Hadoop. Similarly, if you wish to
install other software on your image then the same script is the place to do it.
+ If you want to build an image with a version of Hadoop that is not available from the Apache
distribution site (e.g. trunk, or a patched version) then you will need to alter the ''create-hadoop-image-remote''
script to retrieve and install your required version of Hadoop. Similarly, if you wish to
install other software on your image then the same script is the place to do it.[[http://www.customessayhelp.com/|essay
help]]
  
  === Making an image public ===
  Since there are already public Hadoop AMIs available you shouldn't need to do this. (At
least consider discussing it on the developer mailing list first, please.) Furthermore, you
should only do this if you are sure you have produced a secure AMI.

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