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111 Commits

Author SHA1 Message Date
bors[bot]
087da5621a
Merge #587
587: Word prefix pair proximity docids indexation refactor r=Kerollmops a=loiclec

# Pull Request

## What does this PR do?
Refactor the code of `WordPrefixPairProximityDocIds` to make it much faster, fix a bug, and add a unit test.

## Why is it faster?
Because we avoid using a sorter to insert the (`word1`, `prefix`, `proximity`) keys and their associated bitmaps, and thus we don't have to sort a potentially very big set of data. I have also added a couple of other optimisations: 

1. reusing allocations
2. using a prefix trie instead of an array of prefixes to get all the prefixes of a word
3. inserting directly into the database instead of putting the data in an intermediary grenad when possible. Also avoid checking for pre-existing values in the database when we know for certain that they do not exist. 

## What bug was fixed?
When reindexing, the `new_prefix_fst_words` prefixes may look like:
```
["ant",  "axo", "bor"]
```
which we group by first letter:
```
[["ant", "axo"], ["bor"]]
```

Later in the code, if we have the word2 "axolotl", we try to find which subarray of prefixes contains its prefixes. This check is done with `word2.starts_with(subarray_prefixes[0])`, but `"axolotl".starts_with("ant")` is false, and thus we wrongly think that there are no prefixes in `new_prefix_fst_words` that are prefixes of `axolotl`.

## StrStrU8Codec
I had to change the encoding of `StrStrU8Codec` to make the second string null-terminated as well. I don't think this should be a problem, but I may have missed some nuances about the impacts of this change.

## Requests when reviewing this PR
I have explained what the code does in the module documentation of `word_pair_proximity_prefix_docids`. It would be nice if someone could read it and give their opinion on whether it is a clear explanation or not. 

I also have a couple questions regarding the code itself:
- Should we clean up and factor out the `PrefixTrieNode` code to try and make broader use of it outside this module? For now, the prefixes undergo a few transformations: from FST, to array, to prefix trie. It seems like it could be simplified.
- I wrote a function called `write_into_lmdb_database_without_merging`. (1) Are we okay with such a function existing? (2) Should it be in `grenad_helpers` instead?

## Benchmark Results

We reduce the time it takes to index about 8% in most cases, but it varies between -3% and -20%. 

```
group                                                                     indexing_main_ce90fc62                  indexing_word-prefix-pair-proximity-docids-refactor_cbad2023
-----                                                                     ----------------------                  ------------------------------------------------------------
indexing/-geo-delete-facetedNumber-facetedGeo-searchable-                 1.00  1893.0±233.03µs        ? ?/sec    1.01  1921.2±260.79µs        ? ?/sec
indexing/-movies-delete-facetedString-facetedNumber-searchable-           1.05      9.4±3.51ms        ? ?/sec     1.00      9.0±2.14ms        ? ?/sec
indexing/-movies-delete-facetedString-facetedNumber-searchable-nested-    1.22    18.3±11.42ms        ? ?/sec     1.00     15.0±5.79ms        ? ?/sec
indexing/-songs-delete-facetedString-facetedNumber-searchable-            1.00     41.4±4.20ms        ? ?/sec     1.28    53.0±13.97ms        ? ?/sec
indexing/-wiki-delete-searchable-                                         1.00   285.6±18.12ms        ? ?/sec     1.03   293.1±16.09ms        ? ?/sec
indexing/Indexing geo_point                                               1.03      60.8±0.45s        ? ?/sec     1.00      58.8±0.68s        ? ?/sec
indexing/Indexing movies in three batches                                 1.14      16.5±0.30s        ? ?/sec     1.00      14.5±0.24s        ? ?/sec
indexing/Indexing movies with default settings                            1.11      13.7±0.07s        ? ?/sec     1.00      12.3±0.28s        ? ?/sec
indexing/Indexing nested movies with default settings                     1.10      10.6±0.11s        ? ?/sec     1.00       9.6±0.15s        ? ?/sec
indexing/Indexing nested movies without any facets                        1.11       9.4±0.15s        ? ?/sec     1.00       8.5±0.10s        ? ?/sec
indexing/Indexing songs in three batches with default settings            1.18      66.2±0.39s        ? ?/sec     1.00      56.0±0.67s        ? ?/sec
indexing/Indexing songs with default settings                             1.07      58.7±1.26s        ? ?/sec     1.00      54.7±1.71s        ? ?/sec
indexing/Indexing songs without any facets                                1.08      53.1±0.88s        ? ?/sec     1.00      49.3±1.43s        ? ?/sec
indexing/Indexing songs without faceted numbers                           1.08      57.7±1.33s        ? ?/sec     1.00      53.3±0.98s        ? ?/sec
indexing/Indexing wiki                                                    1.06   1051.1±21.46s        ? ?/sec     1.00    989.6±24.55s        ? ?/sec
indexing/Indexing wiki in three batches                                   1.20    1184.8±8.93s        ? ?/sec     1.00     989.7±7.06s        ? ?/sec
indexing/Reindexing geo_point                                             1.04      67.5±0.75s        ? ?/sec     1.00      64.9±0.32s        ? ?/sec
indexing/Reindexing movies with default settings                          1.12      13.9±0.17s        ? ?/sec     1.00      12.4±0.13s        ? ?/sec
indexing/Reindexing songs with default settings                           1.05      60.6±0.84s        ? ?/sec     1.00      57.5±0.99s        ? ?/sec
indexing/Reindexing wiki                                                  1.07   1725.0±17.92s        ? ?/sec     1.00    1611.4±9.90s        ? ?/sec
```

Co-authored-by: Loïc Lecrenier <loic@meilisearch.com>
2022-08-17 14:06:12 +00:00
Loïc Lecrenier
306593144d Refactor word prefix pair proximity indexation 2022-08-17 11:59:00 +02:00
Loïc Lecrenier
5d59bfde8a Sort Cargo.toml dependencies 2022-08-17 11:46:56 +02:00
Loïc Lecrenier
20be69e1b9 Always use mimalloc as the global allocator 2022-08-16 20:09:36 +02:00
Loïc Lecrenier
07003704a8 Merge branch 'filter/field-exist' 2022-07-21 14:51:41 +02:00
Clémentine Urquizar
d5e9b7305b
Update version for next release (v0.32.0) 2022-07-21 13:20:02 +04:00
Loïc Lecrenier
392472f4bb Apply suggestions from code review
Co-authored-by: Tamo <tamo@meilisearch.com>
2022-07-19 10:07:33 +02:00
Loïc Lecrenier
453d593ce8 Add a database containing the docids where each field exists 2022-07-19 10:07:33 +02:00
Kerollmops
cc48992e79
Bump the milli version to 0.31.1 2022-06-22 17:05:51 +02:00
Kerollmops
f5c3b951bc
Bump the milli version to 0.31.0 2022-06-22 12:08:16 +02:00
Clémentine Urquizar
31f749b5d8
Update version for next release (v0.30.0) 2022-06-20 12:09:57 +02:00
ManyTheFish
447195a27a Replace format by to_string 2022-06-14 10:32:44 +02:00
ManyTheFish
0d1d354052 Ensure that Index methods are not bypassed by Meilisearch 2022-06-13 17:34:11 +02:00
Tamo
676187ba43
bump milli version 2022-06-09 16:53:32 +02:00
Kerollmops
56ee9cc21f
Bump the version to 0.29.2 2022-06-08 16:00:06 +02:00
Clémentine Urquizar
478dbfa45a
Update version for next release (v0.29.1) 2022-06-07 18:59:33 +02:00
Clémentine Urquizar
6ce1c6487a
Update version for next release (v0.29.0) 2022-06-02 18:07:55 +02:00
Clémentine Urquizar
c19c17eddb
Update version to v0.28.1 2022-06-01 18:31:02 +02:00
ManyTheFish
895f5d8a26 Bump milli version 2022-05-18 10:37:12 +02:00
Clémentine Urquizar
d138b3c704
Update version 2022-04-25 18:43:46 +02:00
Clémentine Urquizar
8d630a6f62
Update version for the next release (v0.26.1) 2022-04-14 11:44:06 +02:00
Clémentine Urquizar
ee1d627803
Update version (v0.26.0) 2022-04-07 15:56:10 +02:00
bors[bot]
4ae7aea3b2
Merge #486
486: Update version (v0.25.0) r=curquiza a=curquiza

v0.25.0 will be released once #478 is merged

Co-authored-by: Clémentine Urquizar <clementine@meilisearch.com>
2022-04-06 11:40:41 +00:00
Clémentine Urquizar
9eec44dd98
Update version (v0.25.0) 2022-04-05 12:06:42 +02:00
ad hoc
ab185a59b5
fix infos 2022-04-05 09:46:56 +02:00
ad hoc
9963f11172
fix infos crate compilation issue 2022-04-04 20:54:03 +02:00
Clémentine Urquizar
ddf78a735b
Update version (v0.24.1) 2022-03-24 16:39:45 +01:00
Kerollmops
08a06b49f0
Bump version to 0.23.1 2022-03-15 15:50:28 +01:00
Kerollmops
63682c2c9a
Upgrade the dependencies 2022-03-15 11:17:44 +01:00
Clémentine Urquizar
d9ed9de2b0
Update heed link in cargo toml 2022-03-01 19:45:29 +01:00
Irevoire
0defeb268c
bump milli 2022-02-16 13:27:41 +01:00
Clémentine Urquizar
d03b3ceb58
Update version for the next release (v0.22.1) 2022-02-07 18:39:29 +01:00
Tamo
367f403693
bump milli 2022-01-17 16:41:34 +01:00
many
1b3923b5ce
Update all packages to 0.21.0 2021-11-29 12:17:59 +01:00
many
743ed9f57f
Bump milli version 2021-11-04 14:04:21 +01:00
many
702589104d
Update version for the next release (v0.20.1) 2021-11-03 14:20:01 +01:00
Clémentine Urquizar
056ff13c4d
Update version for the next release (v0.20.0) 2021-10-28 14:52:57 +02:00
Clémentine Urquizar
679fe18b17
Update version for the next release (v0.19.0) 2021-10-25 11:52:17 +02:00
Clémentine Urquizar
f8fe9316c0
Update version for the next release (v0.18.1) 2021-10-21 11:56:14 +02:00
Clémentine Urquizar
2209acbfe2
Update version for the next release (v0.18.2) 2021-10-18 13:45:48 +02:00
Clémentine Urquizar
dd56e82dba
Update version for the next release (v0.17.2) 2021-10-11 15:20:35 +02:00
many
5ed75de0db
Update infos crate 2021-10-05 13:56:12 +02:00
Clémentine Urquizar
05d8a33a28
Update version for the next release (v0.17.1) 2021-10-02 16:21:31 +02:00
Clémentine Urquizar
0e8665bf18
Update version for the next release (v0.17.0) 2021-09-28 19:38:12 +02:00
Clémentine Urquizar
1eacab2169
Update version for the next release (v0.15.1) 2021-09-22 17:18:54 +02:00
Clémentine Urquizar
f8ecbc28e2
Update version for the next release (v0.15.0) 2021-09-21 18:09:14 +02:00
Clémentine Urquizar
3f1453f470
Update version for the next release (v0.14.0) 2021-09-20 18:12:23 +02:00
Clémentine Urquizar
f167f7b412
Update version for the next release (v0.13.1) 2021-09-10 09:48:17 +02:00
Clémentine Urquizar
eb7b9d9dbf
Update version for the next release (v0.13.0) 2021-09-08 10:59:30 +02:00
bors[bot]
5cbe879325
Merge #308
308: Implement a better parallel indexer r=Kerollmops a=ManyTheFish

Rewrite the indexer:
- enhance memory consumption control
- optimize parallelism using rayon and crossbeam channel
- factorize the different parts and make new DB implementation easier
- optimize and fix prefix databases


Co-authored-by: many <maxime@meilisearch.com>
2021-09-02 15:03:52 +00:00