Go to file
bors[bot] 15d478cf4d
Merge #635
635: Use an unstable algorithm for `grenad::Sorter` when possible r=Kerollmops a=loiclec

# Pull Request
## What does this PR do?

Use an unstable algorithm to sort the internal vector used by `grenad::Sorter` whenever possible to speed up indexing.

In practice, every time the merge function creates a `RoaringBitmap`, we use an unstable sort. For every other merge function, such as `keep_first`, `keep_last`, etc., a stable sort is used.


Co-authored-by: Loïc Lecrenier <loic@meilisearch.com>
2022-09-14 12:00:52 +00:00
.github Upgrade ubuntu-18.04 to 20.04 2022-09-08 14:58:06 +02:00
benchmarks Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
cli Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
filter-parser Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
flatten-serde-json Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
helpers Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
http-ui Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
infos Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
json-depth-checker Update version for the next release (v0.33.4) in Cargo.toml files 2022-09-13 13:55:50 +00:00
milli Merge #635 2022-09-14 12:00:52 +00:00
script format the whole project 2021-06-16 18:33:33 +02:00
.gitignore Add snapshot tests for Facets::execute 2022-08-10 15:53:46 +02:00
.rustfmt.toml format the whole project 2021-06-16 18:33:33 +02:00
bors.toml Upgrade ubuntu-18.04 to 20.04 2022-09-08 14:58:06 +02:00
Cargo.toml Make binaries faster on release profile through better compile options 2022-08-17 10:29:33 +02:00
CONTRIBUTING.md Remove the wip section part of the contributing file 2022-05-04 14:44:51 +02:00
LICENSE Update LICENSE 2022-02-15 15:52:50 +01:00
README.md Update README.md 2022-04-25 18:14:43 +02:00

the milli logo

a concurrent indexer combined with fast and relevant search algorithms

Introduction

This repository contains the core engine used in Meilisearch.

It contains a library that can manage one and only one index. Meilisearch manages the multi-index itself. Milli is unable to store updates in a store: it is the job of something else above and this is why it is only able to process one update at a time.

This repository contains crates to quickly debug the engine:

  • There are benchmarks located in the benchmarks crate.
  • The cli crate is a simple command-line interface that helps run flamegraph on top of it.
  • The filter-parser crate contains the parser for the Meilisearch filter syntax.
  • The flatten-serde-json crate contains the library that flattens serde-json Value objects like Elasticsearch does.
  • The helpers crate is only used to do operations on the database.
  • The http-ui crate is a simple HTTP dashboard to test the features like for real!
  • The infos crate is used to dump the internal data-structure and ensure correctness.
  • The json-depth-checker crate is used to indicate if a JSON must be flattened.

How to use it?

Milli is a library that does search things, it must be embedded in a program. You can compute the documentation of it by using cargo doc --open.

Here is an example usage of the library where we insert documents into the engine and search for one of them right after.

let path = tempfile::tempdir().unwrap();
let mut options = EnvOpenOptions::new();
options.map_size(10 * 1024 * 1024); // 10 MB
let index = Index::new(options, &path).unwrap();

let mut wtxn = index.write_txn().unwrap();
let content = documents!([
    {
        "id": 2,
        "title": "Prideand Prejudice",
        "au{hor": "Jane Austin",
        "genre": "romance",
        "price$": "3.5$",
    },
    {
        "id": 456,
        "title": "Le Petit Prince",
        "au{hor": "Antoine de Saint-Exupéry",
        "genre": "adventure",
        "price$": "10.0$",
    },
    {
        "id": 1,
        "title": "Wonderland",
        "au{hor": "Lewis Carroll",
        "genre": "fantasy",
        "price$": "25.99$",
    },
    {
        "id": 4,
        "title": "Harry Potter ing fantasy\0lood Prince",
        "au{hor": "J. K. Rowling",
        "genre": "fantasy\0",
    },
]);

let config = IndexerConfig::default();
let indexing_config = IndexDocumentsConfig::default();
let mut builder =
    IndexDocuments::new(&mut wtxn, &index, &config, indexing_config.clone(), |_| ())
        .unwrap();
builder.add_documents(content).unwrap();
builder.execute().unwrap();
wtxn.commit().unwrap();


// You can search in the index now!
let mut rtxn = index.read_txn().unwrap();
let mut search = Search::new(&rtxn, &index);
search.query("horry");
search.limit(10);

let result = search.execute().unwrap();
assert_eq!(result.documents_ids.len(), 1);

Contributing

We're glad you're thinking about contributing to this repository! Feel free to pick an issue, and to ask any question you need. Some points might not be clear and we are available to help you!

Also, we recommend following the CONTRIBUTING.md to create your PR.