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| <h1 title="Package" class="title">Package org.apache.datasketches.cpc</h1> |
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| <div class="block">Compressed Probabilistic Counting</div> |
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| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Lee Rhodes, Kevin Lang</dd> |
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| <th class="colFirst" scope="row"><a href="../../../../org/apache/datasketches/cpc/CompressionCharacterization.html" title="class in org.apache.datasketches.cpc">CompressionCharacterization</a></th> |
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| <div class="block">This code is used both by unit tests, for short running tests, |
| and by the characterization repository for longer running, more exhaustive testing.</div> |
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| <th class="colFirst" scope="row"><a href="../../../../org/apache/datasketches/cpc/CpcSketch.html" title="class in org.apache.datasketches.cpc">CpcSketch</a></th> |
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| <div class="block">This is a unique-counting sketch that implements the |
| <i>Compressed Probabilistic Counting (CPC, a.k.a FM85)</i> algorithms developed by Kevin Lang in |
| his paper |
| <a href="https://arxiv.org/abs/1708.06839">Back to the Future: an Even More Nearly |
| Optimal Cardinality Estimation Algorithm</a>.</div> |
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| <div class="block">The union (merge) operation for the CPC sketches.</div> |
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| <div class="block">This provides a read-only view of a serialized image of a CpcSketch, which can be |
| on-heap or off-heap represented as a Memory object, or on-heap represented as a byte array.</div> |
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| and by the characterization repository for longer running, more exhaustive testing.</div> |
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