cassandra-server
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A thin Javascript wrapper around Apache Cassandra to provide out of the box server support
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<h2 title="Class HistogramBuilder" class="title">Class HistogramBuilder</h2>
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<li>org.apache.cassandra.utils.HistogramBuilder</li>
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<pre>public class <span class="strong">HistogramBuilder</span>
extends java.lang.Object</pre>
<div class="block">Simple class for constructing an EsimtatedHistogram from a set of predetermined values</div>
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<td class="colOne"><code><strong><a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#HistogramBuilder()">HistogramBuilder</a></strong>()</code> </td>
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<td class="colOne"><code><strong><a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#HistogramBuilder(long[])">HistogramBuilder</a></strong>(long[] values)</code> </td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#add(long)">add</a></strong>(long value)</code> </td>
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<td class="colFirst"><code><a href="../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#buildWithStdevRangesAroundMean()">buildWithStdevRangesAroundMean</a></strong>()</code>
<div class="block">See <a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#buildWithStdevRangesAroundMean(int)"><code>buildWithStdevRangesAroundMean(int)</code></a></div>
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<td class="colFirst"><code><a href="../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#buildWithStdevRangesAroundMean(int)">buildWithStdevRangesAroundMean</a></strong>(int maxdevs)</code>
<div class="block">Calculate the min, mean, max and standard deviation of the items in the builder, and
generate an EstimatedHistogram with upto <code>maxdev</code> stdev size ranges either
side of the mean, until min/max are hit; if either min/max are not reached a further range is
inserted at the relevant ends.</div>
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<pre>public HistogramBuilder()</pre>
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<pre>public HistogramBuilder(long[] values)</pre>
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<pre>public void add(long value)</pre>
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<h4>buildWithStdevRangesAroundMean</h4>
<pre>public <a href="../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a> buildWithStdevRangesAroundMean()</pre>
<div class="block">See <a href="../../../../org/apache/cassandra/utils/HistogramBuilder.html#buildWithStdevRangesAroundMean(int)"><code>buildWithStdevRangesAroundMean(int)</code></a></div>
<dl><dt><span class="strong">Returns:</span></dt><dd>buildWithStdevRangesAroundMean(3)</dd></dl>
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<pre>public <a href="../../../../org/apache/cassandra/utils/EstimatedHistogram.html" title="class in org.apache.cassandra.utils">EstimatedHistogram</a> buildWithStdevRangesAroundMean(int maxdevs)</pre>
<div class="block">Calculate the min, mean, max and standard deviation of the items in the builder, and
generate an EstimatedHistogram with upto <code>maxdev</code> stdev size ranges either
side of the mean, until min/max are hit; if either min/max are not reached a further range is
inserted at the relevant ends. e.g., with a <code>maxdevs</code> of 3, there may be <i>up to</i> 8 ranges
(between 9 boundaries, the middle being the mean); the middle 6 will have the same size (stdev)
with the outermost two stretching out to min and max.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>maxdevs</code> - </dd>
<dt><span class="strong">Returns:</span></dt><dd></dd></dl>
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