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these two links, one can be exposed to a large number of perspectives on
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these two links, one can be exposed to a large number of perspectives on
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the Beowulf architecture, and draw his / her own conclusions.</para>
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the Beowulf architecture, and draw his / her own conclusions.</para>
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<para>What’s the difference between a true Beowulf cluster and a COW
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<para>What's the difference between a true Beowulf cluster and a COW
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[cluster of workstations]? Brahma gives a good definition:<ulink
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[cluster of workstations]? Brahma gives a good definition:<ulink
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url="http://www.phy.duke.edu/brahma/beowulf_book/node62.html">
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url="http://www.phy.duke.edu/brahma/beowulf_book/node62.html">
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http://www.phy.duke.edu/brahma/beowulf_book/node62.html</ulink>.</para>
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http://www.phy.duke.edu/brahma/beowulf_book/node62.html</ulink>.</para>
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<para>So let's get "wolfing." Choose the most powerful box to be the head
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<para>So let's get "wolfing." Choose the most powerful box to be the head
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node. Install Linux there and choose every package you want. The only
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node. Install Linux there and choose every package you want. The only
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requirement is that you choose "Network Servers" [in Red Hat terminology]
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requirement is that you choose "Network Servers" [in Red Hat terminology]
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because you need to have NFS and ssh. That’s all you need. In my case, I
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because you need to have NFS and ssh. That's all you need. In my case, I
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was going to do development of the Beowulf application, so I added X and C
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was going to do development of the Beowulf application, so I added X and C
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development.</para>
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development.</para>
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@ -346,7 +346,7 @@ chmod 755 ~/.ssh </screen>
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<para>According to the LAM user group, only the head node needs to log
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<para>According to the LAM user group, only the head node needs to log
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on to the slave nodes; not the other way around. Therefore when we copy
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on to the slave nodes; not the other way around. Therefore when we copy
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the public key files, we only copy the head node’s key file to each
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the public key files, we only copy the head node's key file to each
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slave node, and set up the agent on the head node. This is MUCH easier
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slave node, and set up the agent on the head node. This is MUCH easier
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than copying all authorized_keys files to all nodes. I will describe
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than copying all authorized_keys files to all nodes. I will describe
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this in more detail later.</para>
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this in more detail later.</para>
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@ -450,7 +450,7 @@ NO firewall</screen>
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<title>Post Install Commands</title>
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<title>Post Install Commands</title>
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<para>After your newly installed box reboots, log on as root again,
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<para>After your newly installed box reboots, log on as root again,
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and…</para>
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and...</para>
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<itemizedlist>
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<itemizedlist>
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<listitem>
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<listitem>
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