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<h1 class="topictitle1">Host server administration</h1>
<div><p>Describes the host servers that are commonly used with iSeries™ Access
for Windows<sup>®</sup>,
and describes how to effectively manage and use them.</p>
<p>This topic provides brief descriptions of server functions that run on
an iSeries server
and technical information specific to host servers that are used by the iSeries Access
for Windows product.
These are not all of the servers used by iSeries Access for Windows,
and this topic does not address all of the servers on the host (iSeries) system.</p>
<div class="section"><h4 class="sectiontitle">i5/OS™ host
servers</h4><p>Host servers handle requests from client PCs or devices
such as running an application, querying a database, printing a document,
or even performing a backup or recovery procedure. iSeries computers are full-function servers
capable of performing many tasks at once, including file, database, applications,
mail, print, fax, and wireless communications. When these tasks are handled
by several different servers, server management and coordination becomes complex.
Having all of your servers on one integrated system greatly reduces the overall
cost and complexity of managing your network.</p>
<p>These servers are used
by iSeries Access
for Windows,
but are designed so that other client products can also use them. This topic
focuses on how these servers are used by iSeries Access for Windows.</p>
</div>
<div class="section"><h4 class="sectiontitle">Adding or removing the Host Server option</h4><p>The servers
discussed here are all optimized servers, and are included with the base option
of i5/OS.
To use the iSeries Navigator
function of iSeries Access
for Windows,
install the Host Server option.</p>
<p>If you are not using any iSeries Access
for Windows products
or iSeries NetServer™ and
would like to remove the Host Server option, you should end the subsystems
used by these servers before you remove the option. End the QBASE or QCMN
subsystem (for host servers with APPC support), the QSYSWRK and QUSRWRK subsystems
(for host servers with sockets support), and the QSERVER subsystem (for database
and file server). Problems may occur if you try to delete the option while
any of these subsystems are active.</p>
</div>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="rzaiicahstsvr.htm">Identify i5/OS host servers and associated programs.</a></strong><br />
Describes many of the host servers that are common in the iSeries Access
for Windows client
and the related objects. You can view the servers by type or by their function
in iSeries Access
for Windows.</li>
<li class="ulchildlink"><strong><a href="rzaiimst27.htm">Use i5/OS host servers</a></strong><br />
Describes the client/server communication process,
and how to manage it. Additionally, this topic lists relevant iSeries system
values and subsystems, and describes how to identify, display and manage server
jobs on the iSeries.</li>
<li class="ulchildlink"><strong><a href="rzaiimst31.htm">Use server exit programs</a></strong><br />
Shows how to write and register exit programs. You can also find exit program parameters and programming examples in this topic.</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiioverview.htm" title="Use this topic to administer iSeries Access for Windows in your client/server environment.">iSeries Access for Windows: Administration</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="rzaiiodbc15.htm" title="Consider the following ODBC program security strategies.">ODBC program security strategies</a></div>
<div><a href="rzaiiodbc25.htm" title="Each ODBC connection communicates with one database server program that runs on the iSeries server. This program is referred to as the host server program.">Troubleshoot the iSeries server connection</a></div>
</div>
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