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<!-- INDEX BEGIN -->
+<div name="index">
+<p><a name="__index__"></a></p>
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<ul>
<li><a href="#bugs">BUGS</a></li>
<li><a href="#author">AUTHOR</a></li>
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<p>
for RRDtool which allow you to use it directly from Perl, python, Tcl,
PHP, etc.</p>
<dl>
-<dt><strong><a name="item_create"><strong>create</strong></a></strong></dt>
+<dt><strong><a name="create" class="item"><strong>create</strong></a></strong></dt>
<dd>
<p>Set up a new Round Robin Database (RRD). Check <a href="././rrdcreate.html">the rrdcreate manpage</a>.</p>
</dd>
-<dt><strong><a name="item_update"><strong>update</strong></a></strong></dt>
+<dt><strong><a name="update" class="item"><strong>update</strong></a></strong></dt>
<dd>
<p>Store new data values into an RRD. Check <a href="././rrdupdate.html">the rrdupdate manpage</a>.</p>
</dd>
-<dt><strong><a name="item_updatev"><strong>updatev</strong></a></strong></dt>
+<dt><strong><a name="updatev" class="item"><strong>updatev</strong></a></strong></dt>
<dd>
<p>Operationally equivalent to <strong>update</strong> except for output. Check <a href="././rrdupdate.html">the rrdupdate manpage</a>.</p>
</dd>
-<dt><strong><a name="item_graph"><strong>graph</strong></a></strong></dt>
+<dt><strong><a name="graph" class="item"><strong>graph</strong></a></strong></dt>
<dd>
<p>Create a graph from data stored in one or several RRDs. Apart from
generating graphs, data can also be extracted to stdout. Check <a href="././rrdgraph.html">the rrdgraph manpage</a>.</p>
</dd>
-<dt><strong><a name="item_dump"><strong>dump</strong></a></strong></dt>
+<dt><strong><a name="dump" class="item"><strong>dump</strong></a></strong></dt>
<dd>
<p>Dump the contents of an RRD in plain ASCII. In connection with restore
you can use this to move an RRD from one computer architecture to
another. Check <a href="././rrddump.html">the rrddump manpage</a>.</p>
</dd>
-<dt><strong><a name="item_restore"><strong>restore</strong></a></strong></dt>
+<dt><strong><a name="restore" class="item"><strong>restore</strong></a></strong></dt>
<dd>
<p>Restore an RRD in XML format to a binary RRD. Check <a href="././rrdrestore.html">the rrdrestore manpage</a></p>
</dd>
-<dt><strong><a name="item_fetch"><strong>fetch</strong></a></strong></dt>
+<dt><strong><a name="fetch" class="item"><strong>fetch</strong></a></strong></dt>
<dd>
<p>Get data for a certain time period from a RRD. The graph function
uses fetch to retrieve its data from an RRD. Check <a href="././rrdfetch.html">the rrdfetch manpage</a>.</p>
</dd>
-<dt><strong><a name="item_tune"><strong>tune</strong></a></strong></dt>
+<dt><strong><a name="tune" class="item"><strong>tune</strong></a></strong></dt>
<dd>
<p>Alter setup of an RRD. Check <a href="././rrdtune.html">the rrdtune manpage</a>.</p>
</dd>
-<dt><strong><a name="item_last"><strong>last</strong></a></strong></dt>
+<dt><strong><a name="last" class="item"><strong>last</strong></a></strong></dt>
<dd>
<p>Find the last update time of an RRD. Check <a href="././rrdlast.html">the rrdlast manpage</a>.</p>
</dd>
-<dt><strong><a name="item_info"><strong>info</strong></a></strong></dt>
+<dt><strong><a name="info" class="item"><strong>info</strong></a></strong></dt>
<dd>
<p>Get information about an RRD. Check <a href="././rrdinfo.html">the rrdinfo manpage</a>.</p>
</dd>
-<dt><strong><a name="item_rrdresize"><strong>rrdresize</strong></a></strong></dt>
+<dt><strong><a name="rrdresize" class="item"><strong>rrdresize</strong></a></strong></dt>
<dd>
<p>Change the size of individual RRAs. This is dangerous! Check <a href="././rrdresize.html">the rrdresize manpage</a>.</p>
</dd>
-<dt><strong><a name="item_xport"><strong>xport</strong></a></strong></dt>
+<dt><strong><a name="xport" class="item"><strong>xport</strong></a></strong></dt>
<dd>
<p>Export data retrieved from one or several RRDs. Check <a href="././rrdxport.html">the rrdxport manpage</a></p>
</dd>
-<dt><strong><a name="item_rrdcgi"><strong>rrdcgi</strong></a></strong></dt>
+<dt><strong><a name="rrdcgi" class="item"><strong>rrdcgi</strong></a></strong></dt>
<dd>
<p>This is a standalone tool for producing RRD graphs on the fly. Check
@@ -152,7 +158,7 @@ uses fetch to retrieve its data from an RRD. Check <a href="././rrdfetch.html">t
</p>
<h2><a name="how_does_rrdtool_work">HOW DOES RRDTOOL WORK?</a></h2>
<dl>
-<dt><strong><a name="item_data_acquisition">Data Acquisition</a></strong></dt>
+<dt><strong><a name="data_acquisition" class="item">Data Acquisition</a></strong></dt>
<dd>
<p>When monitoring the state of a system, it is convenient to have the
stored as well and is also taken into account when interpolating the
next log entry.</p>
</dd>
-<dt><strong><a name="item_consolidation">Consolidation</a></strong></dt>
+<dt><strong><a name="consolidation" class="item">Consolidation</a></strong></dt>
<dd>
<p>You may log data at a 1 minute interval, but you might also be
different consolidation setups within one <strong>RRD</strong>. They will all be
maintained on the fly when new data is loaded into the <strong>RRD</strong>.</p>
</dd>
-<dt><strong><a name="item_round_robin_archives">Round Robin Archives</a></strong></dt>
+<dt><strong><a name="round_robin_archives" class="item">Round Robin Archives</a></strong></dt>
<dd>
<p>Data values of the same consolidation setup are stored into Round
one minute traffic on the LAN, the minimum temperature of your wine cellar,
the total minutes of down time, etc.</p>
</dd>
-<dt><strong><a name="item_unknown_data">Unknown Data</a></strong></dt>
+<dt><strong><a name="unknown_data" class="item">Unknown Data</a></strong></dt>
<dd>
<p>As mentioned earlier, the <strong>RRD</strong> stores data at a constant
data point is above a configurable level. If not, an <em>*UNKNOWN*</em> value
will be written to the <strong>RRA</strong>.</p>
</dd>
-<dt><strong><a name="item_graphing">Graphing</a></strong></dt>
+<dt><strong><a name="graphing" class="item">Graphing</a></strong></dt>
<dd>
<p><strong>RRDtool</strong> allows you to generate reports in numerical and
contents of the graph can be defined freely. Check <a href="././rrdgraph.html">the rrdgraph manpage</a>
for more information on this.</p>
</dd>
-<dt><strong><a name="item_aberrant_behavior_detection">Aberrant Behavior Detection</a></strong></dt>
+<dt><strong><a name="aberrant_behavior_detection" class="item">Aberrant Behavior Detection</a></strong></dt>
<dd>
<p>by Jake Brutlag</p>
coefficient (a periodic effect, such as a daily cycle). There is one
seasonal coefficient for each time point in the period (cycle). After
a value is observed, each of these components is updated via
-exponential smoothing. This means that the algorithm ``learns'' from
+exponential smoothing. This means that the algorithm "learns" from
past values and uses them to predict the future. The rate of
adaptation is governed by 3 parameters, alpha (intercept), beta
(slope), and gamma (seasonal). The prediction can also be viewed as a