1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "document_inverter_context.h"
#include <cassert>
#include <optional>
namespace search::memoryindex {
using vespalib::ISequencedTaskExecutor;
using index::SchemaIndexFields;
namespace {
template <typename Context>
void make_contexts(const index::Schema& schema, const SchemaIndexFields& schema_index_fields, ISequencedTaskExecutor& executor, std::vector<Context>& contexts)
{
using ExecutorId = ISequencedTaskExecutor::ExecutorId;
using IdMapping = std::vector<std::tuple<ExecutorId, bool, uint32_t, uint32_t>>;
IdMapping map;
for (uint32_t field_id : schema_index_fields._textFields) {
// TODO: Add bias when sharing sequenced task executor between document types
auto& name = schema.getIndexField(field_id).getName();
auto id = executor.getExecutorIdFromName(name);
map.emplace_back(id, false, field_id, 0);
}
uint32_t uri_field_id = 0;
for (auto& uri_field : schema_index_fields._uriFields) {
// TODO: Add bias when sharing sequenced task executor between document types
auto& name = schema.getIndexField(uri_field._all).getName();
auto id = executor.getExecutorIdFromName(name);
map.emplace_back(id, true, uri_field_id, uri_field._all);
++uri_field_id;
}
std::sort(map.begin(), map.end());
std::optional<ExecutorId> prev_id;
for (auto& entry : map) {
if (!prev_id.has_value() || prev_id.value() != std::get<0>(entry)) {
contexts.emplace_back(std::get<0>(entry));
prev_id = std::get<0>(entry);
}
if (std::get<1>(entry)) {
contexts.back().add_uri_field(std::get<2>(entry), std::get<3>(entry));
} else {
contexts.back().add_field(std::get<2>(entry));
}
}
}
void switch_to_alternate_ids(ISequencedTaskExecutor& executor, std::vector<PushContext>& contexts, uint32_t bias)
{
for (auto& context : contexts) {
context.set_id(executor.get_alternate_executor_id(context.get_id(), bias));
}
}
class PusherMapping {
std::vector<std::optional<uint32_t>> _pushers;
public:
PusherMapping(size_t size);
~PusherMapping();
void add_mapping(const std::vector<uint32_t>& fields, uint32_t pusher_id) {
for (auto field_id : fields) {
assert(field_id < _pushers.size());
auto& opt_pusher = _pushers[field_id];
assert(!opt_pusher.has_value());
opt_pusher = pusher_id;
}
}
void use_mapping(const std::vector<uint32_t>& fields, std::vector<uint32_t>& pushers) {
for (auto field_id : fields) {
assert(field_id < _pushers.size());
auto& opt_pusher = _pushers[field_id];
assert(opt_pusher.has_value());
pushers.emplace_back(opt_pusher.value());
}
}
};
PusherMapping::PusherMapping(size_t size)
: _pushers(size)
{
}
PusherMapping::~PusherMapping() = default;
/*
* Connect contexts for inverting to contexts for pushing. If we use
* different sequenced task executors or adds different biases to the
* getExecutorId() argument (to enable double buffering) then contexts
* for inverting and contexts for pushing will bundle different sets
* of fields, preventing a 1:1 mapping. If we use the same sequenced
* task executor and drop double buffering then we can simplify this
* to a 1:1 mapping.
*/
void connect_contexts(std::vector<InvertContext>& invert_contexts,
const std::vector<PushContext>& push_contexts,
uint32_t num_fields,
uint32_t num_uri_fields)
{
PusherMapping field_to_pusher(num_fields);
PusherMapping uri_field_to_pusher(num_uri_fields);
uint32_t pusher_id = 0;
for (auto& push_context : push_contexts) {
field_to_pusher.add_mapping(push_context.get_fields(), pusher_id);
uri_field_to_pusher.add_mapping(push_context.get_uri_fields(), pusher_id);
++pusher_id;
}
std::vector<uint32_t> pushers;
for (auto& invert_context : invert_contexts) {
pushers.clear();
field_to_pusher.use_mapping(invert_context.get_fields(), pushers);
uri_field_to_pusher.use_mapping(invert_context.get_uri_fields(), pushers);
std::sort(pushers.begin(), pushers.end());
auto last = std::unique(pushers.begin(), pushers.end());
pushers.erase(last, pushers.end());
for (auto pusher : pushers) {
invert_context.add_pusher(pusher);
}
}
}
}
DocumentInverterContext::DocumentInverterContext(const index::Schema& schema,
ISequencedTaskExecutor &invert_threads,
ISequencedTaskExecutor &push_threads,
IFieldIndexCollection& field_indexes)
: _schema(schema),
_schema_index_fields(),
_invert_threads(invert_threads),
_push_threads(push_threads),
_field_indexes(field_indexes),
_invert_contexts(),
_push_contexts()
{
_schema_index_fields.setup(schema);
setup_contexts();
}
DocumentInverterContext::~DocumentInverterContext() = default;
void
DocumentInverterContext::setup_contexts()
{
make_contexts(_schema, _schema_index_fields, _invert_threads, _invert_contexts);
make_contexts(_schema, _schema_index_fields, _push_threads, _push_contexts);
if (&_invert_threads == &_push_threads) {
uint32_t bias = _schema_index_fields._textFields.size() + _schema_index_fields._uriFields.size();
switch_to_alternate_ids(_push_threads, _push_contexts, bias);
}
connect_contexts(_invert_contexts, _push_contexts, _schema.getNumIndexFields(), _schema_index_fields._uriFields.size());
}
}
|
