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<h1 class="topictitle1">Logs and journals</h1>
<div><p>Record keeping is an important way for the system to protect data
and track system problems. This topic describes what logs and journals are
for and how to use them.</p>
<p>Protecting the data and resources on the system is a critical part of the
operating system. One important way the iSeries™ servers accomplish that goal
is to keep detailed records of any changes to system resources. These records,
called <em>logs</em> or <em>journals</em>, can help solve system problems or recover
damaged data.</p>
<div class="section"><h4 class="sectiontitle">Logs</h4><p>A <dfn class="term">log</dfn> is a database file that
contains the history of backup, archive, recovery, and media management operations
that can be displayed online or printed for future reference.
Logs are used in backup and recovery situations. Logs can also contain information
about jobs, general system information, and problems.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Types
of logs</caption><thead align="left"><tr valign="bottom"><th valign="bottom" width="14.285714285714285%" id="d0e42">Log</th>
<th valign="bottom" width="85.71428571428571%" id="d0e44">Description</th>
</tr>
</thead>
<tbody><tr><td valign="top" width="14.285714285714285%" headers="d0e42 ">Job logs</td>
<td valign="top" width="85.71428571428571%" headers="d0e44 ">Track the description, status, and action of jobs performed by the
system.</td>
</tr>
<tr><td valign="top" width="14.285714285714285%" headers="d0e42 ">History logs</td>
<td valign="top" width="85.71428571428571%" headers="d0e44 ">Get general system information, like device changes, operator messages,
job completion and other activities.</td>
</tr>
<tr><td valign="top" width="14.285714285714285%" headers="d0e42 ">Problem logs</td>
<td valign="top" width="85.71428571428571%" headers="d0e44 ">Retrieve records of system problems that occurred on an iSeries system.</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Journals</h4><p>A <dfn class="term">journal</dfn> is a system object
that contains information about changes made to another system object. The
journal can be used to recover database files, data areas, data queues, and
integrated file systems objects. Regular journaling speeds up management tasks
such as save operations.</p>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzal2reference.htm" title="Learn about the essential components of the iSeries server, including the basics of work management, how to interact with the operating system, and system maintenance.">i5/OS concepts</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="../rzahb/rzahbloa.htm">Job logs</a></div>
<div><a href="../rzahb/rzahbloc.htm">History logs</a></div>
<div><a href="../rzahb/rzahbloe.htm">Problem logs</a></div>
<div><a href="../rzaki/rzakikickoff.htm">Journal management</a></div>
</div>
<div class="relinfo"><strong>Related information</strong><br />
<div><a href="../books/sc415304.pdf" target="_blank">Backup and Recovery PDF</a></div>
</div>
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