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<h1><a name="_Toc421867148">Different Types of LON-CAPA Servers</a></h1>
<p><i>Scott Harrison, freeware volunteer, sharrison@sourceforge.net</i><span
style='font-style:normal'> </span></p>
<h2><a name="_Toc421867149">Introduction</a></h2>
<p>There are two different kinds of LON-CAPA servers, Library Servers and
Access Servers. On any LON-CAPA machine, you can look at the server type by
viewing the file <tt><span style='font-family:"Courier New"'>/etc/httpd/conf/loncapa.conf</span></tt>
and looking at the variable <strong>lonRole</strong>. </p>
<h2><a name="_Toc421867150">Library Servers</a></h2>
<p>Library Servers are repositories of authoritative educational resources.
These servers also provide the construction space by which instructors assemble
their classroom online material. First-time installations of LON-CAPA at an
institution should be for Library Servers (and not Access Servers). </p>
<p>Only Library Servers make use of a MySQL database. </p>
<p>On the filesystem, the following directories are used primarily by Library
Servers (and not Access Servers): </p>
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mso-list:l0 level1 lfo1;tab-stops:list .5in'><tt><span style='font-family:
"Courier New"'>/home/USERNAME/</span></tt> - authors are standard Linux
users that exist on Library Servers </li>
<li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
mso-list:l0 level1 lfo1;tab-stops:list .5in'><tt><span style='font-family:
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information is stored inside Library Servers </li>
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mso-list:l0 level1 lfo1;tab-stops:list .5in'><tt><span style='font-family:
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<p class=MsoNormal style='margin-left:.5in'>- Library Servers use this space to
hold authoritative or cached versions of educational resources; Access Servers
only use this space to hold cached versions of educational resources </p>
<h2><a name="_Toc421867151">Access Servers</a></h2>
<p>Access Servers load-balance high-traffic delivery of educational resources
over the world-wide web. Access Servers do not require a MySQL database and do
not contain Linux user accounts. Several of the active directories on Library
Servers are not needed on an Access Servers. </p>
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