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<h1 class="topictitle1">Object identification</h1>
<div><p>Because the existence of an independent disk pool on a server means that
multiple  databases exist on a single server, identifying an object is more
complex  than it is on a system with only a single system database. When multiple
databases  exist, it is possible to duplicate the names of libraries and objects
in separate  databases. The library name and object name do not necessarily
uniquely identify  an object. There will be times when you also need to know
the name of the  independent disk pool. The name of the independent disk pool
and its database are, by default, the same. However, they do not necessarily
have to match. A  database name can be up to 18 characters long, while an
independent disk pool  name can be up to 10 characters long.</p>
<p>While the same library name can exist in two different disk pool groups,
libraries cannot have the same name in the system disk pool as in an independent
disk pool. </p>
<div class="section"><h4 class="sectiontitle">Control language (CL) commands</h4>When using control language
(CL) commands that support specification of  *ALL or *ALLUSR for the libraries
to be searched, the system will typically  interpret this to mean "all (user)
libraries in your current library namespace"  rather than "all (user) libraries
on the system." Some commands may interpret  *ALL or *ALLUSR differently,
so it is important to check the command documentation. <p>If you
used the Display Object Description (<a href="../cl/dspobjd.htm">DSPOBJD</a>)
command, certain system libraries, like QSYS, may appear multiple times if
the command is showing information for both the system disk pool and one or
more independent disk pools.  </p>
<div class="note"><span class="notetitle">Note:</span> Most messages that go to the job log
(QSYSOPR) or history log  do not contain the name of the independent disk
pool. They only contain the  object name and library. You must determine what,
if any, disk pool group the  job that issued the message was using to be able
to find the object.</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzalyhowiaspswork.htm">How independent disk pools work</a></div>
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