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<div class="title">/data/users/hoss/faiss/IndexReplicas.cpp</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "IndexReplicas.h"</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "FaissAssert.h"</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">namespace </span>faiss {</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00014"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae"> 14</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate<IndexT>::IndexReplicasTemplate</a>(<span class="keywordtype">bool</span> threaded)</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  : <a class="code" href="classfaiss_1_1ThreadedIndex.html">ThreadedIndex</a><IndexT>(threaded) {</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> }</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#ada9226643e1a48e45c65ffecc57b7391"> 19</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate<IndexT>::IndexReplicasTemplate</a>(idx_t d, <span class="keywordtype">bool</span> threaded)</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  : <a class="code" href="classfaiss_1_1ThreadedIndex.html">ThreadedIndex</a><IndexT>(d, threaded) {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> }</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00024"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#adbad834789bb985ce8c99a82dc020248"> 24</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">IndexReplicasTemplate<IndexT>::IndexReplicasTemplate</a>(<span class="keywordtype">int</span> d, <span class="keywordtype">bool</span> threaded)</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  : <a class="code" href="classfaiss_1_1ThreadedIndex.html">ThreadedIndex</a><IndexT>(d, threaded) {</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a4fd98a5ba105391bfb3e490d84d26b27"> 30</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a4fd98a5ba105391bfb3e490d84d26b27">IndexReplicasTemplate<IndexT>::onAfterAddIndex</a>(IndexT* index) {</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="comment">// Make sure that the parameters are the same for all prior indices, unless</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="comment">// we're the first index to be added</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">if</span> (this->count() > 0 && this->at(0) != index) {</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">auto</span> existing = this->at(0);</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  FAISS_THROW_IF_NOT_FMT(index->ntotal == existing->ntotal,</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="stringliteral">"IndexReplicas: newly added index does "</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="stringliteral">"not have same number of vectors as prior index; "</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="stringliteral">"prior index has %ld vectors, new index has %ld"</span>,</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  existing->ntotal, index->ntotal);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  FAISS_THROW_IF_NOT_MSG(index->is_trained == existing->is_trained,</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="stringliteral">"IndexReplicas: newly added index does "</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="stringliteral">"not have same train status as prior index"</span>);</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// Set our parameters based on the first index we're adding</span></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// (dimension is handled in ThreadedIndex)</span></div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  this->ntotal = index->ntotal;</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  this->verbose = index->verbose;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  this->is_trained = index->is_trained;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  this->metric_type = index->metric_type;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> }</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a5cdb2a340a3b4f45ec244d5398a29005"> 57</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a5cdb2a340a3b4f45ec244d5398a29005">IndexReplicasTemplate<IndexT>::train</a>(idx_t n, <span class="keyword">const</span> component_t* x) {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  this->runOnIndex([n, x](<span class="keywordtype">int</span>, IndexT* index){ index->train(n, x); });</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a6b110e7efab3d01be7ae7cb346d9fbf9"> 63</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a6b110e7efab3d01be7ae7cb346d9fbf9">IndexReplicasTemplate<IndexT>::add</a>(idx_t n, <span class="keyword">const</span> component_t* x) {</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  this->runOnIndex([n, x](<span class="keywordtype">int</span>, IndexT* index){ index->add(n, x); });</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  this->ntotal += n;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> }</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#a9fb6804492c12359b5cc2aa26fe6a6d6"> 70</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#a9fb6804492c12359b5cc2aa26fe6a6d6">IndexReplicasTemplate<IndexT>::reconstruct</a>(idx_t n, component_t* x)<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  FAISS_THROW_IF_NOT_MSG(this->count() > 0, <span class="stringliteral">"no replicas in index"</span>);</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// Just pass to the first replica</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  this->at(0)->reconstruct(n, x);</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classfaiss_1_1IndexReplicasTemplate.html#ad6382e3ebaaca61607ad90fc80cdbd3c"> 79</a></span> <a class="code" href="classfaiss_1_1IndexReplicasTemplate.html#ad6382e3ebaaca61607ad90fc80cdbd3c">IndexReplicasTemplate<IndexT>::search</a>(idx_t n,</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> component_t* x,</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  idx_t k,</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  distance_t* distances,</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  idx_t* labels)<span class="keyword"> const </span>{</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  FAISS_THROW_IF_NOT_MSG(this->count() > 0, <span class="stringliteral">"no replicas in index"</span>);</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> (n == 0) {</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">auto</span> dim = this->d;</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordtype">size_t</span> componentsPerVec =</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">sizeof</span>(component_t) == 1 ? (dim + 7) / 8 : dim;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="comment">// Partition the query by the number of indices we have</span></div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a> queriesPerIndex =</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a>) (n + this->count() - 1) /</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a>) this->count();</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  FAISS_ASSERT(n / queriesPerIndex <= this->count());</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">auto</span> fn =</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  [queriesPerIndex, componentsPerVec,</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  n, x, k, distances, labels](<span class="keywordtype">int</span> i, <span class="keyword">const</span> IndexT* index) {</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a> base = (<a class="code" href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">faiss::Index::idx_t</a>) i * queriesPerIndex;</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span> (base < n) {</div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">auto</span> numForIndex = std::min(queriesPerIndex, n - base);</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  index-><a class="code" href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">search</a>(numForIndex,</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  x + base * componentsPerVec,</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  k,</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  distances + base * k,</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  labels + base * k);</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  };</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  this->runOnIndex(fn);</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">// explicit instantiations</span></div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="classfaiss_1_1IndexReplicasTemplate.html">IndexReplicasTemplate<Index></a>;</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">template</span> <span class="keyword">struct </span><a class="code" href="classfaiss_1_1IndexReplicasTemplate.html">IndexReplicasTemplate<IndexBinary></a>;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> } <span class="comment">// namespace</span></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a5cdb2a340a3b4f45ec244d5398a29005"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a5cdb2a340a3b4f45ec244d5398a29005">faiss::IndexReplicasTemplate::train</a></div><div class="ttdeci">void train(idx_t n, const component_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00057">IndexReplicas.cpp:57</a></div></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a29d851d995abc011c759a855ae0057ae"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a29d851d995abc011c759a855ae0057ae">faiss::IndexReplicasTemplate::IndexReplicasTemplate</a></div><div class="ttdeci">IndexReplicasTemplate(bool threaded=true)</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00014">IndexReplicas.cpp:14</a></div></div>
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<div class="ttc" id="structfaiss_1_1Index_html_ad3f0d3071f987baabbdd3da4500c87ea"><div class="ttname"><a href="structfaiss_1_1Index.html#ad3f0d3071f987baabbdd3da4500c87ea">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>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a4fd98a5ba105391bfb3e490d84d26b27"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a4fd98a5ba105391bfb3e490d84d26b27">faiss::IndexReplicasTemplate::onAfterAddIndex</a></div><div class="ttdeci">void onAfterAddIndex(IndexT *index) override</div><div class="ttdoc">Called just after an index is added. </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00030">IndexReplicas.cpp:30</a></div></div>
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<div class="ttc" id="classfaiss_1_1ThreadedIndex_html"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html">faiss::ThreadedIndex</a></div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex_8h_source.html#l00021">ThreadedIndex.h:21</a></div></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_ad6382e3ebaaca61607ad90fc80cdbd3c"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#ad6382e3ebaaca61607ad90fc80cdbd3c">faiss::IndexReplicasTemplate::search</a></div><div class="ttdeci">void search(idx_t n, const component_t *x, idx_t k, distance_t *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00079">IndexReplicas.cpp:79</a></div></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a9fb6804492c12359b5cc2aa26fe6a6d6"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a9fb6804492c12359b5cc2aa26fe6a6d6">faiss::IndexReplicasTemplate::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t, component_t *v) const override</div><div class="ttdoc">reconstructs from the first index </div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00070">IndexReplicas.cpp:70</a></div></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html_a6b110e7efab3d01be7ae7cb346d9fbf9"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html#a6b110e7efab3d01be7ae7cb346d9fbf9">faiss::IndexReplicasTemplate::add</a></div><div class="ttdeci">void add(idx_t n, const component_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8cpp_source.html#l00063">IndexReplicas.cpp:63</a></div></div>
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<div class="ttc" id="classfaiss_1_1IndexReplicasTemplate_html"><div class="ttname"><a href="classfaiss_1_1IndexReplicasTemplate.html">faiss::IndexReplicasTemplate</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexReplicas_8h_source.html#l00021">IndexReplicas.h:21</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexIVF_html_ae2fd47b7d52603659e269aa8f6abb613"><div class="ttname"><a href="structfaiss_1_1IndexIVF.html#ae2fd47b7d52603659e269aa8f6abb613">faiss::IndexIVF::search</a></div><div class="ttdeci">void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexIVF_8cpp_source.html#l00228">IndexIVF.cpp:228</a></div></div>
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