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/data/users/matthijs/github_faiss/faiss/MetaIndexes.h
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the CC-by-NC license found in the
* LICENSE file in the root directory of this source tree.
*/
// Copyright 2004-present Facebook. All Rights Reserved.
// -*- c++ -*-
#ifndef META_INDEXES_H
#define META_INDEXES_H
#include <vector>
#include "Index.h"
namespace faiss {
/** Index that translates search results to ids */
struct IndexIDMap : Index {
Index * index; ///! the sub-index
bool own_fields; ///! whether pointers are deleted in destructo
std::vector<long> id_map;
explicit IndexIDMap (Index *index);
/// Same as add_core, but stores xids instead of sequential ids
/// @param xids if non-null, ids to store for the vectors (size n)
virtual void add_with_ids (idx_t n, const float * x, const long *xids)
override;
/// this will fail. Use add_with_ids
virtual void add (idx_t n, const float *x) override;
virtual void search (
idx_t n, const float *x, idx_t k,
float *distances, idx_t *labels) const override;
virtual void train (idx_t n, const float *x) override;
virtual void reset () override;
virtual void set_typename () override;
virtual ~IndexIDMap ();
IndexIDMap () {own_fields=false; index=nullptr; }
};
/** Index that concatenates the results from several sub-indexes
*
*/
struct IndexShards : Index {
std::vector<Index*> shard_indexes;
bool own_fields; /// should the sub-indexes be deleted along with this?
bool threaded;
bool successive_ids;
/**
* @param threaded do we use one thread per sub_index or do
* queries sequentially?
* @param successive_ids should we shift the returned ids by
* the size of each sub-index or return them
* as they are?
*/
explicit IndexShards (idx_t d, bool threaded = false,
bool successive_ids = true);
void add_shard (Index *);
// update metric_type and ntotal. Call if you changes something in
// the shard indexes.
void sync_with_shard_indexes ();
Index *at(int i) {return shard_indexes[i]; }
/// supported only for sub-indices that implement add_with_ids
virtual void add (idx_t n, const float *x) override;
virtual void add_with_ids (idx_t n, const float * x, const long *xids)
override;
virtual void search (
idx_t n, const float *x, idx_t k,
float *distances, idx_t *labels) const override;
virtual void train (idx_t n, const float *x) override;
virtual void reset () override;
virtual void set_typename () override;
virtual ~IndexShards ();
};
/** splits input vectors in segments and assigns each segment to a sub-index
* used to distribute a MultiIndexQuantizer
*/
struct IndexSplitVectors: Index {
bool own_fields;
bool threaded;
std::vector<Index*> sub_indexes;
idx_t sum_d; /// sum of dimensions seen so far
explicit IndexSplitVectors (idx_t d, bool threaded = false);
void add_sub_index (Index *);
void sync_with_sub_indexes ();
virtual void add (idx_t n, const float *x) override;
virtual void search (
idx_t n, const float *x, idx_t k,
float *distances, idx_t *labels) const override;
virtual void train (idx_t n, const float *x) override;
virtual void reset () override;
virtual void set_typename () override;
virtual ~IndexSplitVectors ();
};
}
#endif
faiss::IndexShards::train
virtual void train(idx_t n, const float *x) override
Definition: MetaIndexes.cpp:310
faiss::IndexShards::IndexShards
IndexShards(idx_t d, bool threaded=false, bool successive_ids=true)
Definition: MetaIndexes.cpp:280
faiss::IndexIDMap::search
virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override
Definition: MetaIndexes.cpp:69
faiss::IndexShards::add_with_ids
virtual void add_with_ids(idx_t n, const float *x, const long *xids) override
Definition: MetaIndexes.cpp:350
faiss::IndexShards::search
virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override
Definition: MetaIndexes.cpp:408
faiss::IndexIDMap
Definition: MetaIndexes.h:26
faiss::IndexSplitVectors::reset
virtual void reset() override
removes all elements from the database.
Definition: MetaIndexes.cpp:640
faiss::IndexIDMap::add
virtual void add(idx_t n, const float *x) override
this will fail. Use add_with_ids
Definition: MetaIndexes.cpp:40
faiss::IndexSplitVectors
Definition: MetaIndexes.h:109
faiss::Index::d
int d
vector dimension
Definition: Index.h:66
faiss::IndexIDMap::id_map
std::vector< long > id_map
! whether pointers are deleted in destructo
Definition: MetaIndexes.h:29
faiss::IndexSplitVectors::train
virtual void train(idx_t n, const float *x) override
Definition: MetaIndexes.cpp:635
faiss::IndexShards::add
virtual void add(idx_t n, const float *x) override
supported only for sub-indices that implement add_with_ids
Definition: MetaIndexes.cpp:333
faiss::Index::idx_t
long idx_t
all indices are this type
Definition: Index.h:64
faiss::IndexSplitVectors::add
virtual void add(idx_t n, const float *x) override
Definition: MetaIndexes.cpp:535
faiss::IndexShards::threaded
bool threaded
should the sub-indexes be deleted along with this?
Definition: MetaIndexes.h:62
faiss::IndexShards::reset
virtual void reset() override
removes all elements from the database.
Definition: MetaIndexes.cpp:400
faiss::IndexIDMap::reset
virtual void reset() override
removes all elements from the database.
Definition: MetaIndexes.cpp:53
faiss::IndexSplitVectors::search
virtual void search(idx_t n, const float *x, idx_t k, float *distances, idx_t *labels) const override
Definition: MetaIndexes.cpp:580
faiss::IndexIDMap::train
virtual void train(idx_t n, const float *x) override
Definition: MetaIndexes.cpp:47
faiss::Index
Definition: Index.h:61
faiss::IndexShards
Definition: MetaIndexes.h:58
faiss::IndexIDMap::add_with_ids
virtual void add_with_ids(idx_t n, const float *x, const long *xids) override
Definition: MetaIndexes.cpp:60
faiss::IndexSplitVectors::IndexSplitVectors
IndexSplitVectors(idx_t d, bool threaded=false)
sum of dimensions seen so far
Definition: MetaIndexes.cpp:505
faiss::IndexIDMap::own_fields
bool own_fields
! the sub-index
Definition: MetaIndexes.h:28