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<div class="title">/data/users/hoss/faiss/IndexShards.h</div> </div>
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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">#pragma once</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "Index.h"</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "IndexBinary.h"</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "ThreadedIndex.h"</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span>faiss {</div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">/**</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Index that concatenates the results from several sub-indexes</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">template</span> <<span class="keyword">typename</span> IndexT></div>
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<div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexShardsTemplate.html"> 20</a></span> <span class="keyword">struct </span><a class="code" href="structfaiss_1_1IndexShardsTemplate.html">IndexShardsTemplate</a> : <span class="keyword">public</span> <a class="code" href="classfaiss_1_1ThreadedIndex.html">ThreadedIndex</a><IndexT> {</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">using</span> idx_t = <span class="keyword">typename</span> IndexT::idx_t;</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">using</span> component_t = <span class="keyword">typename</span> IndexT::component_t;</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keyword">using</span> distance_t = <span class="keyword">typename</span> IndexT::distance_t;</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> /**</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * The dimension that all sub-indices must share will be the dimension of the</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * first sub-index added</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * @param threaded do we use one thread per sub_index or do</span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * queries sequentially?</span></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * @param successive_ids should we shift the returned ids by</span></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * the size of each sub-index or return them</span></div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * as they are?</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a2ffc0edbce1815fae55cae188b83a5cf">IndexShardsTemplate</a>(<span class="keywordtype">bool</span> threaded = <span class="keyword">false</span>,</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordtype">bool</span> successive_ids = <span class="keyword">true</span>);</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> /**</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * @param threaded do we use one thread per sub_index or do</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * queries sequentially?</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * @param successive_ids should we shift the returned ids by</span></div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * the size of each sub-index or return them</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * as they are?</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a2ffc0edbce1815fae55cae188b83a5cf">IndexShardsTemplate</a>(idx_t d,</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">bool</span> threaded = <span class="keyword">false</span>,</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">bool</span> successive_ids = <span class="keyword">true</span>);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"></span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> /// int version due to the implicit bool conversion ambiguity of int as</span></div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> /// dimension</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></span> <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a2ffc0edbce1815fae55cae188b83a5cf">IndexShardsTemplate</a>(<span class="keywordtype">int</span> d,</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">bool</span> threaded = <span class="keyword">false</span>,</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordtype">bool</span> successive_ids = <span class="keyword">true</span>);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"></span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> /// Alias for addIndex()</span></div>
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<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexShardsTemplate.html#a47a2e1f78d91025857f483be3eb6828a"> 56</a></span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a47a2e1f78d91025857f483be3eb6828a">add_shard</a>(IndexT* index) { this-><a class="code" href="classfaiss_1_1ThreadedIndex.html#a9a11a672369d48f45cf1dd1bfe0dad87">addIndex</a>(index); }</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// Alias for removeIndex()</span></div>
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<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexShardsTemplate.html#ae0bff98885fecae6c42a474d05563ecd"> 59</a></span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#ae0bff98885fecae6c42a474d05563ecd">remove_shard</a>(IndexT* index) { this-><a class="code" href="classfaiss_1_1ThreadedIndex.html#a21604d6b8b8d42e6cc78c26e85564027">removeIndex</a>(index); }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"></span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// supported only for sub-indices that implement add_with_ids</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a45647579ff21e0945d8a87a97ec705fe">add</a>(idx_t n, <span class="keyword">const</span> component_t* x) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /**</span></div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * Cases (successive_ids, xids):</span></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * - true, non-NULL ERROR: it makes no sense to pass in ids and</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * request them to be shifted</span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * - true, NULL OK, but should be called only once (calls add()</span></div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * on sub-indexes).</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * - false, non-NULL OK: will call add_with_ids with passed in xids</span></div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * distributed evenly over shards</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * - false, NULL OK: will call add_with_ids on each sub-index,</span></div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * starting at ntotal</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a15e0b4a2fd85f9345537d215a331ed91">add_with_ids</a>(idx_t n, <span class="keyword">const</span> component_t* x, <span class="keyword">const</span> idx_t* xids) <span class="keyword">override</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="keywordtype">void</span> search(idx_t n, <span class="keyword">const</span> component_t* x, idx_t k,</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  distance_t* distances, idx_t* labels) <span class="keyword">const override</span>;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordtype">void</span> train(idx_t n, <span class="keyword">const</span> component_t* x) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// update metric_type and ntotal. Call if you changes something in</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="comment">// the shard indexes.</span></div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordtype">void</span> sync_with_shard_indexes();</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="keywordtype">bool</span> successive_ids;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">protected</span>:<span class="comment"></span></div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> /// Called just after an index is added</span></div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a1d78dd47e9dc49488947e90dbc85e1ac">onAfterAddIndex</a>(IndexT* index) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span></div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /// Called just after an index is removed</span></div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"></span> <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexShardsTemplate.html#a0488d95e9d45e0cfab203c83e3a8e3c1">onAfterRemoveIndex</a>(IndexT* index) <span class="keyword">override</span>;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> };</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">using</span> IndexShards = IndexShardsTemplate<Index>;</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">using</span> IndexBinaryShards = IndexShardsTemplate<IndexBinary>;</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </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="comment">// namespace faiss</span></div>
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<div class="ttc" id="classfaiss_1_1ThreadedIndex_html_a21604d6b8b8d42e6cc78c26e85564027"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html#a21604d6b8b8d42e6cc78c26e85564027">faiss::ThreadedIndex::removeIndex</a></div><div class="ttdeci">void removeIndex(IndexT *index)</div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex-inl_8h_source.html#l00088">ThreadedIndex-inl.h:88</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="structfaiss_1_1IndexShardsTemplate_html_a15e0b4a2fd85f9345537d215a331ed91"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a15e0b4a2fd85f9345537d215a331ed91">faiss::IndexShardsTemplate::add_with_ids</a></div><div class="ttdeci">void add_with_ids(idx_t n, const component_t *x, const idx_t *xids) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8cpp_source.html#l00198">IndexShards.cpp:198</a></div></div>
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<div class="ttc" id="classfaiss_1_1ThreadedIndex_html_a9a11a672369d48f45cf1dd1bfe0dad87"><div class="ttname"><a href="classfaiss_1_1ThreadedIndex.html#a9a11a672369d48f45cf1dd1bfe0dad87">faiss::ThreadedIndex::addIndex</a></div><div class="ttdeci">void addIndex(IndexT *index)</div><div class="ttdef"><b>Definition:</b> <a href="ThreadedIndex-inl_8h_source.html#l00049">ThreadedIndex-inl.h:49</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_a47a2e1f78d91025857f483be3eb6828a"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a47a2e1f78d91025857f483be3eb6828a">faiss::IndexShardsTemplate::add_shard</a></div><div class="ttdeci">void add_shard(IndexT *index)</div><div class="ttdoc">Alias for addIndex() </div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8h_source.html#l00056">IndexShards.h:56</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_a2ffc0edbce1815fae55cae188b83a5cf"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a2ffc0edbce1815fae55cae188b83a5cf">faiss::IndexShardsTemplate::IndexShardsTemplate</a></div><div class="ttdeci">IndexShardsTemplate(bool threaded=false, bool successive_ids=true)</div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8cpp_source.html#l00126">IndexShards.cpp:126</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html">faiss::IndexShardsTemplate</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8h_source.html#l00020">IndexShards.h:20</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_a45647579ff21e0945d8a87a97ec705fe"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a45647579ff21e0945d8a87a97ec705fe">faiss::IndexShardsTemplate::add</a></div><div class="ttdeci">void add(idx_t n, const component_t *x) override</div><div class="ttdoc">supported only for sub-indices that implement add_with_ids </div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8cpp_source.html#l00191">IndexShards.cpp:191</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_a1d78dd47e9dc49488947e90dbc85e1ac"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a1d78dd47e9dc49488947e90dbc85e1ac">faiss::IndexShardsTemplate::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="IndexShards_8cpp_source.html#l00134">IndexShards.cpp:134</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_ae0bff98885fecae6c42a474d05563ecd"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#ae0bff98885fecae6c42a474d05563ecd">faiss::IndexShardsTemplate::remove_shard</a></div><div class="ttdeci">void remove_shard(IndexT *index)</div><div class="ttdoc">Alias for removeIndex() </div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8h_source.html#l00059">IndexShards.h:59</a></div></div>
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<div class="ttc" id="structfaiss_1_1IndexShardsTemplate_html_a0488d95e9d45e0cfab203c83e3a8e3c1"><div class="ttname"><a href="structfaiss_1_1IndexShardsTemplate.html#a0488d95e9d45e0cfab203c83e3a8e3c1">faiss::IndexShardsTemplate::onAfterRemoveIndex</a></div><div class="ttdeci">void onAfterRemoveIndex(IndexT *index) override</div><div class="ttdoc">Called just after an index is removed. </div><div class="ttdef"><b>Definition:</b> <a href="IndexShards_8cpp_source.html#l00140">IndexShards.cpp:140</a></div></div>
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