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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "AmazonEC2" by JoydeepSensarma
Date Sun, 17 May 2009 12:46:42 GMT
Dear Wiki user,

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

The following page has been changed by JoydeepSensarma:
http://wiki.apache.org/hadoop/AmazonEC2

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   * Keep in mind that the master node is started first and configured, then all slaves nodes
are booted simultaneously with boot parameters pointing to the master node. Even though the
`lauch-cluster` command has returned, the whole cluster may not have yet 'booted'. You should
monitor the cluster via port 50030 to make sure all nodes are up. 
  
- [[Anchor(#FromRemoteMachine)]]
+ [[Anchor(FromRemoteMachine)]]
  === Running a job on a cluster from a remote machine (0.17+) ===
  In some cases it's desirable to be able to submit a job to a hadoop cluster running in EC2
from a machine that's outside EC2 (for example a personal workstation). Similarly - it's convenient
to be able to browse/cat files in HDFS from a remote machine. One of the advantages of this
setup is that it obviates the need to create custom AMIs that bundle stock Hadoop AMIs and
user libraries/code. All the non-Hadoop code can be kept on the remote machine and can be
made available to Hadoop during job submission time (in the form of jar files and other files
that are copied into Hadoop's distributed cache). The only downside being the [http://aws.amazon.com/ec2/#pricing
cost of copying these data sets] into EC2 and the latency involved in doing so.
  

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