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sync with FB version 2018-02-23 (#347) - support on-disk IVF
2018-02-23 23:44:31 +08:00
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<div class="title">/data/users/matthijs/github_faiss/faiss/IndexIVFFlat.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright (c) 2015-present, Facebook, Inc.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * This source code is licensed under the BSD+Patents license found in the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;</div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#ifndef FAISS_INDEX_IVF_FLAT_H</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define FAISS_INDEX_IVF_FLAT_H</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#include &quot;IndexIVF.h&quot;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment">/** Inverted file with stored vectors. Here the inverted file</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="comment"> * pre-selects the vectors to be searched, but they are not otherwise</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="comment"> * encoded, the code array just contains the raw float entries.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexIVFFlat.html"> 25</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a>: <a class="code" href="structfaiss_1_1IndexIVF.html">IndexIVF</a> {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> (</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; <a class="code" href="structfaiss_1_1Index.html">Index</a> * <a class="code" href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">quantizer</a>, <span class="keywordtype">size_t</span> <a class="code" href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">d</a>, <span class="keywordtype">size_t</span> nlist_,</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; <a class="code" href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">MetricType</a> = METRIC_L2);</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="comment"> /// same as add_with_ids, with precomputed coarse quantizer</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="comment"></span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">add_core</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> * x, <span class="keyword">const</span> <span class="keywordtype">long</span> *xids,</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; <span class="keyword">const</span> <span class="keywordtype">long</span> *precomputed_idx);</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment"> /// implemented for all IndexIVF* classes</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a5f7356766632d3ce2838f285aa6b8e76">add_with_ids</a>(<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span>* x, <span class="keyword">const</span> <span class="keywordtype">long</span>* xids) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a6abfaf0da529ece0e68909aab4c282fd">search_preassigned</a> (<a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n, <span class="keyword">const</span> <span class="keywordtype">float</span> *x, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> k,</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keyword">const</span> <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *<a class="code" href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">assign</a>,</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keyword">const</span> <span class="keywordtype">float</span> *centroid_dis,</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordtype">float</span> *distances, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *labels,</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keywordtype">bool</span> store_pairs) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#ad2b306f160e153b5cfb572cf1d8ece24">range_search</a>(</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> n,</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keyword">const</span> <span class="keywordtype">float</span>* x,</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordtype">float</span> radius,</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <a class="code" href="structfaiss_1_1RangeSearchResult.html">RangeSearchResult</a>* result) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="comment"> /** Update a subset of vectors.</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="comment"> * The index must have a direct_map</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;<span class="comment"> * @param nv nb of vectors to update</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="comment"> * @param idx vector indices to update, size nv</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="comment"> * @param v vectors of new values, size nv*d</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a2adc0b0002c32ddc01aec4ab96dd659f">update_vectors</a> (<span class="keywordtype">int</span> nv, <a class="code" href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">idx_t</a> *idx, <span class="keyword">const</span> <span class="keywordtype">float</span> *v);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexIVFFlat.html#a1267faf361fc3831ddafe7abc51f0ba2">reconstruct_from_offset</a> (<span class="keywordtype">long</span> list_no, <span class="keywordtype">long</span> offset,</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keywordtype">float</span>* recons) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <a class="code" href="structfaiss_1_1IndexIVFFlat.html">IndexIVFFlat</a> () {}</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;};</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;} <span class="comment">// namespace faiss</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="structfaiss_1_1IndexIVF_html"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html">faiss::IndexIVF</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00166">IndexIVF.h:166</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c"><div class="ttname"><a href="structfaiss_1_1Index.html#a8bc5d8d1cd0dd7b34b3c98a9f76b4a9c">faiss::Index::assign</a></div><div class="ttdeci">void assign(idx_t n, const float *x, idx_t *labels, idx_t k=1)</div><div class="ttdef"><b>Definition:</b> <a href="Index_8cpp_source.html#l00034">Index.cpp:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_ad2b306f160e153b5cfb572cf1d8ece24"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#ad2b306f160e153b5cfb572cf1d8ece24">faiss::IndexIVFFlat::range_search</a></div><div class="ttdeci">void range_search(idx_t n, const float *x, float radius, RangeSearchResult *result) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00231">IndexIVFFlat.cpp:231</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html">faiss::IndexIVFFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8h_source.html#l00025">IndexIVFFlat.h:25</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a2a002388d2c081c2dbab8508dcefe73d"><div class="ttname"><a href="structfaiss_1_1Index.html#a2a002388d2c081c2dbab8508dcefe73d">faiss::Index::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00064">Index.h:64</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a5f7356766632d3ce2838f285aa6b8e76"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a5f7356766632d3ce2838f285aa6b8e76">faiss::IndexIVFFlat::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const float *x, const long *xids) override</div><div class="ttdoc">implemented for all IndexIVF* classes </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00040">IndexIVFFlat.cpp:40</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html_a040c6aed1f224f3ea7bf58eebc0c31a4"><div class="ttname"><a href="structfaiss_1_1Index.html#a040c6aed1f224f3ea7bf58eebc0c31a4">faiss::Index::idx_t</a></div><div class="ttdeci">long idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00062">Index.h:62</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a1267faf361fc3831ddafe7abc51f0ba2"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a1267faf361fc3831ddafe7abc51f0ba2">faiss::IndexIVFFlat::reconstruct_from_offset</a></div><div class="ttdeci">void reconstruct_from_offset(long list_no, long offset, float *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00319">IndexIVFFlat.cpp:319</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a2adc0b0002c32ddc01aec4ab96dd659f"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a2adc0b0002c32ddc01aec4ab96dd659f">faiss::IndexIVFFlat::update_vectors</a></div><div class="ttdeci">void update_vectors(int nv, idx_t *idx, const float *v)</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00283">IndexIVFFlat.cpp:283</a></div></div>
<div class="ttc" id="structfaiss_1_1RangeSearchResult_html"><div class="ttname"><a href="structfaiss_1_1RangeSearchResult.html">faiss::RangeSearchResult</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00029">AuxIndexStructures.h:29</a></div></div>
<div class="ttc" id="structfaiss_1_1Index_html"><div class="ttname"><a href="structfaiss_1_1Index.html">faiss::Index</a></div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00060">Index.h:60</a></div></div>
<div class="ttc" id="structfaiss_1_1Level1Quantizer_html_a3cf99e2ee92b8558a066f821efab95d5"><div class="ttname"><a href="structfaiss_1_1Level1Quantizer.html#a3cf99e2ee92b8558a066f821efab95d5">faiss::Level1Quantizer::quantizer</a></div><div class="ttdeci">Index * quantizer</div><div class="ttdoc">quantizer that maps vectors to inverted lists </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8h_source.html#l00033">IndexIVF.h:33</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_a6abfaf0da529ece0e68909aab4c282fd"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#a6abfaf0da529ece0e68909aab4c282fd">faiss::IndexIVFFlat::search_preassigned</a></div><div class="ttdeci">void search_preassigned(idx_t n, const float *x, idx_t k, const idx_t *assign, const float *centroid_dis, float *distances, idx_t *labels, bool store_pairs) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00212">IndexIVFFlat.cpp:212</a></div></div>
<div class="ttc" id="namespacefaiss_html_afd12191c638da74760ff397cf319752c"><div class="ttname"><a href="namespacefaiss.html#afd12191c638da74760ff397cf319752c">faiss::MetricType</a></div><div class="ttdeci">MetricType</div><div class="ttdoc">Some algorithms support both an inner product version and a L2 search version. </div><div class="ttdef"><b>Definition:</b> <a href="Index_8h_source.html#l00043">Index.h:43</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexIVFFlat_html_aea729c3d8c70bdd93f8e413e834851a4"><div class="ttname"><a href="structfaiss_1_1IndexIVFFlat.html#aea729c3d8c70bdd93f8e413e834851a4">faiss::IndexIVFFlat::add_core</a></div><div class="ttdeci">virtual void add_core(idx_t n, const float *x, const long *xids, const long *precomputed_idx)</div><div class="ttdoc">same as add_with_ids, with precomputed coarse quantizer </div><div class="ttdef"><b>Definition:</b> <a href="IndexIVFFlat_8cpp_source.html#l00045">IndexIVFFlat.cpp:45</a></div></div>
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