81 lines
5.0 KiB
HTML
81 lines
5.0 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Saving objects that have more than one name" />
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<meta name="DC.Relation" scheme="URI" content="rzaiurzaiu148.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2004, 2006" />
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<meta name="DC.Identifier" content="rzaiu152" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Saving objects that have more than one name</title>
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</head>
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<body id="rzaiu152"><a name="rzaiu152"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Saving objects that have more than one name</h1>
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<div><p>You can give more than one name to objects on the server. An additional
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name for an object is sometimes called a link. Some links, referred to as
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hard links, point directly to the object. Other links are more like a nickname
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for an object. The nickname does not point directly to the object. Instead,
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you can think of the nickname as an object that contains the name of the original
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object. This type of link is referred to as a soft link, or a symbolic link.</p>
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<p>If you create links for objects, study the examples that follow to ensure
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that your save strategy saves both the contents of objects and all their possible
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names.</p>
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<p>The following figure shows an example of a hard link: The root directory
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contains UserDir. UserDir contains JCHDIR and DRHDIR. JCHDIR contains FILEA
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that has a hard link to Object A. DRHDIR contains FILEB which also contains
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a hard link to Object A.</p>
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<div class="fignone" id="rzaiu152__lnk1"><a name="rzaiu152__lnk1"><!-- --></a><span class="figcap">Figure 1. An Object with Hard Links–Example</span><br /><img src="rzaiu504.gif" alt="Example of an object with
hard links" /><br /></div>
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<p>You can save Object A with either of the following commands. For both
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commands, you get the description of the specified object and the contents
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of object .: </p>
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<ul><li><samp class="codeph">SAV OBJ('/UserDir/JCHDIR/FILEA')</samp></li>
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<li><samp class="codeph">SAV OBJ('/UserDir/DRHDIR/FILEB')</samp></li>
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</ul>
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<p> If you use only the first command (JCHDIR), you have not saved the fact
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that FILEB is also named in the DRHDIR directory.</p>
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<p>You can use any of the following commands to get the data once and both
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names (hard links) for the file: </p>
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<ul><li><samp class="codeph">SAV OBJ(('/UserDir'))</samp></li>
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<li><samp class="codeph">SAV OBJ(('/UserDir/JCHDIR') ('/UserDir/DRHDIR'))</samp></li>
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<li><samp class="codeph">SAV OBJ(('/UserDir/JCHDIR/FILEA') ('/UserDir/DRHDIR/FILEB'))</samp></li>
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</ul>
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<p>The following figure shows an example of a symbolic link: The root directory
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contains QSYS.LIB and Customer. QSYS.LIB contains CUSTLIB.LIB. CUSTLIB.LIB
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contains CUSTMAS.FILE. Customer is a symbolic link to CUSTMAS.FILE.</p>
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<div class="fignone" id="rzaiu152__lnk2"><a name="rzaiu152__lnk2"><!-- --></a><span class="figcap">Figure 2. An Object with a Symbolic Link–Example</span><p><br /><img src="rzaiu503.gif" alt="Example of An Object
with a Symbolic Link" /><br /></p>
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</div>
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<p>Following are several commands you can use to save the CUSTMAS file (both
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description and data): </p>
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<ul><li><samp class="codeph">SAVLIB LIB(CUSTLIB)</samp></li>
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<li><samp class="codeph">SAVOBJ OBJ(CUSTMAS) LIB(CUSTLIB)</samp></li>
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<li><samp class="codeph">SAV ('/QSYS.LIB/CUSTLIB.LIB/CUSTMAS.FILE')</samp></li>
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<li><samp class="codeph">SAV ('/QSYS.LIB/CUSTLIB.LIB')</samp></li>
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</ul>
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<p>None of these commands saves the fact that the CUSTMAS file has a <span class="q">"nickname"</span> of <samp class="codeph">customer</samp> in
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the root directory.</p>
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<p>If you specify SAV OBJ('/customer'), you save the fact that customer is
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a nickname for the CUSTMAS file. You do not save the description of the CUSTMAS
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file or its contents.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiurzaiu148.htm">Save file systems</a></div>
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</div>
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</div>
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</body>
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</html>
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