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<title>Spooled file</title>
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<h4 id="rzalusplf">Spooled file</h4>
<p>Spooling is a system function that saves data in a database file for later
processing or printing. This data, which is saved and eventually printed,
is called a <span class="italic">spooled file</span> (or printer output file).
When spooling is used, spooled files are created from the application program,
from a system program, or by pressing the Print key. These files are put in
places called output queues.</p>
<p>Almost all application programs that generate printed output make use of
the spooling support provided with the iSeries™ server. Specifying SPOOL = *YES or
SPOOL = *NO on the SPOOL parameter of a printer file determines if spooling
support is requested.</p>
<p>Using the Print key to capture an image of a display screen almost always
results in a spooled file being created (SPOOL = *YES must be specified in
the printer file named in the workstation device description). Unless the
value has been changed, the default value for the SPOOL attribute in the QSYSPRT
printer file is *YES. When the Print key is pressed, the system looks at the
OUTQ parameter in the QSYSPRT printer file to determine which output queue
to send the spooled file to.</p>
<p>Spooling (SPOOL = *YES) has several advantages over direct output (SPOOL
= *NO in the printer file):</p>
<ul>
<li>The user's display station remains available for work.</li>
<li>Other users can request printing work without having to wait for the printer
to become available.</li>
<li>If special forms are required, you can have the spooled files sent to
a special output queue and printed at a time when the printer is not busy.</li>
<li>Because disk operations are much faster than printers, the system is used
efficiently.</li></ul>
<p>For information on how to work with spooled files, see <a href="rzalumanage.htm#rzalumanage">Manage printing</a>.</p>
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