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<p>systems provide the illusion that all processes are running on the same machine - the process management tools (e.g. "ps", "kill" on <a href="page.php?w=Unix">Unix</a> like systems) operate on all processes in the cluster.</p>

<p><big>Single root</big></p>
<p>Most SSI systems provide a single view of the file system. This may be achieved by a simple <a href="page.php?w=Network_File_System_%28protocol%29">NFS</a> server, shared disk devices or even file replication.</p>

<p>The advantage of a single root view is that processes may be run on any available</p><p>
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