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Merge pull request #4136 from meilisearch/diff-indexing-facet-values

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Diff Indexing on the facet values extractors
This commit is contained in:
Clément Renault 2023-10-19 11:22:34 +02:00 committed by GitHub
commit 0f6a0b1ab8
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9 changed files with 386 additions and 108 deletions
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10
milli/src/heed_codec/roaring_bitmap/cbo_roaring_bitmap_codec.rs
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@ -60,12 +60,16 @@ impl CboRoaringBitmapCodec {
/// if the merged values length is under the threshold, values are directly
/// serialized in the buffer else a RoaringBitmap is created from the
/// values and is serialized in the buffer.
pub fn merge_into(slices: &[Cow<[u8]>], buffer: &mut Vec<u8>) -> io::Result<()> {
pub fn merge_into<I, A>(slices: I, buffer: &mut Vec<u8>) -> io::Result<()>
where
I: IntoIterator<Item = A>,
A: AsRef<[u8]>,
{
let mut roaring = RoaringBitmap::new();
let mut vec = Vec::new();
for bytes in slices {
if bytes.len() <= THRESHOLD * size_of::<u32>() {
if bytes.as_ref().len() <= THRESHOLD * size_of::<u32>() {
let mut reader = bytes.as_ref();
while let Ok(integer) = reader.read_u32::<NativeEndian>() {
vec.push(integer);
@ -85,7 +89,7 @@ impl CboRoaringBitmapCodec {
}
} else {
// We can unwrap safely because the vector is sorted upper.
let roaring = RoaringBitmap::from_sorted_iter(vec.into_iter()).unwrap();
let roaring = RoaringBitmap::from_sorted_iter(vec).unwrap();
roaring.serialize_into(buffer)?;
}
} else {

2
milli/src/update/facet/bulk.rs
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@ -132,6 +132,8 @@ impl<R: std::io::Read + std::io::Seek> FacetsUpdateBulkInner<R> {
self.db.delete_range(wtxn, &range).map(drop)?;
Ok(())
}
// TODO the new_data is an Reader<Obkv<Key, Obkv<DelAdd, RoaringBitmap>>>
fn update_level0(&mut self, wtxn: &mut RwTxn) -> Result<()> {
let new_data = match self.new_data.take() {
Some(x) => x,

1
milli/src/update/facet/mod.rs
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@ -114,6 +114,7 @@ pub struct FacetsUpdate<'i> {
min_level_size: u8,
}
impl<'i> FacetsUpdate<'i> {
// TODO grenad::Reader<Key, Obkv<DelAdd, RoaringBitmap>>
pub fn new(index: &'i Index, facet_type: FacetType, new_data: grenad::Reader<File>) -> Self {
let database = match facet_type {
FacetType::String => index

22
milli/src/update/index_documents/extract/extract_facet_number_docids.rs
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@ -4,11 +4,12 @@ use std::io;
use heed::{BytesDecode, BytesEncode};
use super::helpers::{
create_sorter, merge_cbo_roaring_bitmaps, sorter_into_reader, GrenadParameters,
create_sorter, merge_deladd_cbo_roaring_bitmaps, sorter_into_reader, GrenadParameters,
};
use crate::heed_codec::facet::{
FacetGroupKey, FacetGroupKeyCodec, FieldDocIdFacetF64Codec, OrderedF64Codec,
};
use crate::update::del_add::{KvReaderDelAdd, KvWriterDelAdd};
use crate::Result;
/// Extracts the facet number and the documents ids where this facet number appear.
@ -17,7 +18,7 @@ use crate::Result;
/// documents ids from the given chunk of docid facet number positions.
#[logging_timer::time]
pub fn extract_facet_number_docids<R: io::Read + io::Seek>(
docid_fid_facet_number: grenad::Reader<R>,
fid_docid_facet_number: grenad::Reader<R>,
indexer: GrenadParameters,
) -> Result<grenad::Reader<File>> {
puffin::profile_function!();
@ -26,21 +27,30 @@ pub fn extract_facet_number_docids<R: io::Read + io::Seek>(
let mut facet_number_docids_sorter = create_sorter(
grenad::SortAlgorithm::Unstable,
merge_cbo_roaring_bitmaps,
merge_deladd_cbo_roaring_bitmaps,
indexer.chunk_compression_type,
indexer.chunk_compression_level,
indexer.max_nb_chunks,
max_memory,
);
let mut cursor = docid_fid_facet_number.into_cursor()?;
while let Some((key_bytes, _)) = cursor.move_on_next()? {
let mut buffer = Vec::new();
let mut cursor = fid_docid_facet_number.into_cursor()?;
while let Some((key_bytes, deladd_obkv_bytes)) = cursor.move_on_next()? {
let (field_id, document_id, number) =
FieldDocIdFacetF64Codec::bytes_decode(key_bytes).unwrap();
let key = FacetGroupKey { field_id, level: 0, left_bound: number };
let key_bytes = FacetGroupKeyCodec::<OrderedF64Codec>::bytes_encode(&key).unwrap();
facet_number_docids_sorter.insert(key_bytes, document_id.to_ne_bytes())?;
buffer.clear();
let mut obkv = KvWriterDelAdd::new(&mut buffer);
for (deladd_key, _) in KvReaderDelAdd::new(deladd_obkv_bytes).iter() {
obkv.insert(deladd_key, document_id.to_ne_bytes())?;
}
obkv.finish()?;
facet_number_docids_sorter.insert(key_bytes, &buffer)?;
}
sorter_into_reader(facet_number_docids_sorter, indexer)

36
milli/src/update/index_documents/extract/extract_facet_string_docids.rs
View File

@ -1,13 +1,14 @@
use std::fs::File;
use std::io;
use std::{io, str};
use heed::BytesEncode;
use super::helpers::{create_sorter, sorter_into_reader, try_split_array_at, GrenadParameters};
use crate::heed_codec::facet::{FacetGroupKey, FacetGroupKeyCodec};
use crate::heed_codec::StrRefCodec;
use crate::update::index_documents::merge_cbo_roaring_bitmaps;
use crate::{FieldId, Result, MAX_FACET_VALUE_LENGTH};
use crate::update::del_add::{KvReaderDelAdd, KvWriterDelAdd};
use crate::update::index_documents::helpers::merge_deladd_cbo_roaring_bitmaps;
use crate::{FieldId, Result};
/// Extracts the facet string and the documents ids where this facet string appear.
///
@ -24,15 +25,16 @@ pub fn extract_facet_string_docids<R: io::Read + io::Seek>(
let mut facet_string_docids_sorter = create_sorter(
grenad::SortAlgorithm::Stable,
merge_cbo_roaring_bitmaps,
merge_deladd_cbo_roaring_bitmaps,
indexer.chunk_compression_type,
indexer.chunk_compression_level,
indexer.max_nb_chunks,
max_memory,
);
let mut buffer = Vec::new();
let mut cursor = docid_fid_facet_string.into_cursor()?;
while let Some((key, _original_value_bytes)) = cursor.move_on_next()? {
while let Some((key, deladd_original_value_bytes)) = cursor.move_on_next()? {
let (field_id_bytes, bytes) = try_split_array_at(key).unwrap();
let field_id = FieldId::from_be_bytes(field_id_bytes);
@ -40,21 +42,17 @@ pub fn extract_facet_string_docids<R: io::Read + io::Seek>(
try_split_array_at::<_, 4>(bytes).unwrap();
let document_id = u32::from_be_bytes(document_id_bytes);
let mut normalised_value = std::str::from_utf8(normalized_value_bytes)?;
let normalised_truncated_value: String;
if normalised_value.len() > MAX_FACET_VALUE_LENGTH {
normalised_truncated_value = normalised_value
.char_indices()
.take_while(|(idx, _)| *idx < MAX_FACET_VALUE_LENGTH)
.map(|(_, c)| c)
.collect();
normalised_value = normalised_truncated_value.as_str();
}
let key = FacetGroupKey { field_id, level: 0, left_bound: normalised_value };
let normalized_value = str::from_utf8(normalized_value_bytes)?;
let key = FacetGroupKey { field_id, level: 0, left_bound: normalized_value };
let key_bytes = FacetGroupKeyCodec::<StrRefCodec>::bytes_encode(&key).unwrap();
// document id is encoded in native-endian because of the CBO roaring bitmap codec
facet_string_docids_sorter.insert(&key_bytes, document_id.to_ne_bytes())?;
buffer.clear();
let mut obkv = KvWriterDelAdd::new(&mut buffer);
for (deladd_key, _) in KvReaderDelAdd::new(deladd_original_value_bytes).iter() {
obkv.insert(deladd_key, document_id.to_ne_bytes())?;
}
obkv.finish()?;
facet_string_docids_sorter.insert(&key_bytes, &buffer)?;
}
sorter_into_reader(facet_string_docids_sorter, indexer)

348
milli/src/update/index_documents/extract/extract_fid_docid_facet_values.rs
View File

@ -1,24 +1,36 @@
use std::borrow::Cow;
use std::collections::{BTreeMap, HashSet};
use std::convert::TryInto;
use std::fs::File;
use std::io;
use std::mem::size_of;
use std::result::Result as StdResult;
use grenad::Sorter;
use heed::zerocopy::AsBytes;
use heed::BytesEncode;
use itertools::EitherOrBoth;
use ordered_float::OrderedFloat;
use roaring::RoaringBitmap;
use serde_json::{from_slice, Value};
use FilterableValues::{Empty, Null, Values};
use super::helpers::{create_sorter, keep_first, sorter_into_reader, GrenadParameters};
use crate::error::InternalError;
use crate::facet::value_encoding::f64_into_bytes;
use crate::update::del_add::{DelAdd, KvWriterDelAdd};
use crate::update::index_documents::{create_writer, writer_into_reader};
use crate::{CboRoaringBitmapCodec, DocumentId, FieldId, Result, BEU32, MAX_FACET_VALUE_LENGTH};
use crate::{
CboRoaringBitmapCodec, DocumentId, Error, FieldId, Result, BEU32, MAX_FACET_VALUE_LENGTH,
};
/// The length of the elements that are always in the buffer when inserting new values.
const TRUNCATE_SIZE: usize = size_of::<FieldId>() + size_of::<DocumentId>();
/// The extracted facet values stored in grenad files by type.
pub struct ExtractedFacetValues {
pub docid_fid_facet_numbers_chunk: grenad::Reader<File>,
pub docid_fid_facet_strings_chunk: grenad::Reader<File>,
pub fid_docid_facet_numbers_chunk: grenad::Reader<File>,
pub fid_docid_facet_strings_chunk: grenad::Reader<File>,
pub fid_facet_is_null_docids_chunk: grenad::Reader<File>,
pub fid_facet_is_empty_docids_chunk: grenad::Reader<File>,
pub fid_facet_exists_docids_chunk: grenad::Reader<File>,
@ -58,71 +70,150 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
max_memory.map(|m| m / 2),
);
let mut facet_exists_docids = BTreeMap::<FieldId, RoaringBitmap>::new();
let mut facet_is_null_docids = BTreeMap::<FieldId, RoaringBitmap>::new();
let mut facet_is_empty_docids = BTreeMap::<FieldId, RoaringBitmap>::new();
// The tuples represents the Del and Add side for a bitmap
let mut facet_exists_docids = BTreeMap::<FieldId, (RoaringBitmap, RoaringBitmap)>::new();
let mut facet_is_null_docids = BTreeMap::<FieldId, (RoaringBitmap, RoaringBitmap)>::new();
let mut facet_is_empty_docids = BTreeMap::<FieldId, (RoaringBitmap, RoaringBitmap)>::new();
// We create two buffer for mutable ref issues with closures.
let mut numbers_key_buffer = Vec::new();
let mut strings_key_buffer = Vec::new();
let mut key_buffer = Vec::new();
let mut cursor = obkv_documents.into_cursor()?;
while let Some((docid_bytes, value)) = cursor.move_on_next()? {
let obkv = obkv::KvReader::new(value);
for (field_id, field_bytes) in obkv.iter() {
if faceted_fields.contains(&field_id) {
key_buffer.clear();
numbers_key_buffer.clear();
strings_key_buffer.clear();
// Set key to the field_id
// Note: this encoding is consistent with FieldIdCodec
key_buffer.extend_from_slice(&field_id.to_be_bytes());
numbers_key_buffer.extend_from_slice(&field_id.to_be_bytes());
strings_key_buffer.extend_from_slice(&field_id.to_be_bytes());
// Here, we know already that the document must be added to the “field id exists” database
let document: [u8; 4] = docid_bytes[..4].try_into().ok().unwrap();
let document = BEU32::from(document).get();
facet_exists_docids.entry(field_id).or_default().insert(document);
// For the other extraction tasks, prefix the key with the field_id and the document_id
key_buffer.extend_from_slice(docid_bytes);
numbers_key_buffer.extend_from_slice(docid_bytes);
strings_key_buffer.extend_from_slice(docid_bytes);
let value = from_slice(field_bytes).map_err(InternalError::SerdeJson)?;
let del_add_obkv = obkv::KvReader::new(field_bytes);
let del_value = match del_add_obkv.get(DelAdd::Deletion) {
Some(bytes) => from_slice(bytes).map_err(InternalError::SerdeJson)?,
None => None,
};
let add_value = match del_add_obkv.get(DelAdd::Addition) {
Some(bytes) => from_slice(bytes).map_err(InternalError::SerdeJson)?,
None => None,
};
match extract_facet_values(
&value,
geo_fields_ids.map_or(false, |(lat, lng)| field_id == lat || field_id == lng),
) {
FilterableValues::Null => {
facet_is_null_docids.entry(field_id).or_default().insert(document);
}
FilterableValues::Empty => {
facet_is_empty_docids.entry(field_id).or_default().insert(document);
}
FilterableValues::Values { numbers, strings } => {
// insert facet numbers in sorter
for number in numbers {
key_buffer.truncate(size_of::<FieldId>() + size_of::<DocumentId>());
if let Some(value_bytes) = f64_into_bytes(number) {
key_buffer.extend_from_slice(&value_bytes);
key_buffer.extend_from_slice(&number.to_be_bytes());
// We insert the document id on the Del and the Add side if the field exists.
let (ref mut del_exists, ref mut add_exists) =
facet_exists_docids.entry(field_id).or_default();
let (ref mut del_is_null, ref mut add_is_null) =
facet_is_null_docids.entry(field_id).or_default();
let (ref mut del_is_empty, ref mut add_is_empty) =
facet_is_empty_docids.entry(field_id).or_default();
fid_docid_facet_numbers_sorter
.insert(&key_buffer, ().as_bytes())?;
}
if del_value.is_some() {
del_exists.insert(document);
}
if add_value.is_some() {
add_exists.insert(document);
}
let geo_support =
geo_fields_ids.map_or(false, |(lat, lng)| field_id == lat || field_id == lng);
let del_filterable_values =
del_value.map(|value| extract_facet_values(&value, geo_support));
let add_filterable_values =
add_value.map(|value| extract_facet_values(&value, geo_support));
// Those closures are just here to simplify things a bit.
let mut insert_numbers_diff = |del_numbers, add_numbers| {
insert_numbers_diff(
&mut fid_docid_facet_numbers_sorter,
&mut numbers_key_buffer,
del_numbers,
add_numbers,
)
};
let mut insert_strings_diff = |del_strings, add_strings| {
insert_strings_diff(
&mut fid_docid_facet_strings_sorter,
&mut strings_key_buffer,
del_strings,
add_strings,
)
};
match (del_filterable_values, add_filterable_values) {
(None, None) => (),
(Some(del_filterable_values), None) => match del_filterable_values {
Null => {
del_is_null.insert(document);
}
// insert normalized and original facet string in sorter
for (normalized, original) in
strings.into_iter().filter(|(n, _)| !n.is_empty())
{
let normalized_truncated_value: String = normalized
.char_indices()
.take_while(|(idx, _)| idx + 4 < MAX_FACET_VALUE_LENGTH)
.map(|(_, c)| c)
.collect();
key_buffer.truncate(size_of::<FieldId>() + size_of::<DocumentId>());
key_buffer.extend_from_slice(normalized_truncated_value.as_bytes());
fid_docid_facet_strings_sorter
.insert(&key_buffer, original.as_bytes())?;
Empty => {
del_is_empty.insert(document);
}
Values { numbers, strings } => {
insert_numbers_diff(numbers, vec![])?;
insert_strings_diff(strings, vec![])?;
}
},
(None, Some(add_filterable_values)) => match add_filterable_values {
Null => {
add_is_null.insert(document);
}
Empty => {
add_is_empty.insert(document);
}
Values { numbers, strings } => {
insert_numbers_diff(vec![], numbers)?;
insert_strings_diff(vec![], strings)?;
}
},
(Some(del_filterable_values), Some(add_filterable_values)) => {
match (del_filterable_values, add_filterable_values) {
(Null, Null) | (Empty, Empty) => (),
(Null, Empty) => {
del_is_null.insert(document);
add_is_empty.insert(document);
}
(Empty, Null) => {
del_is_empty.insert(document);
add_is_null.insert(document);
}
(Null, Values { numbers, strings }) => {
insert_numbers_diff(vec![], numbers)?;
insert_strings_diff(vec![], strings)?;
del_is_null.insert(document);
}
(Empty, Values { numbers, strings }) => {
insert_numbers_diff(vec![], numbers)?;
insert_strings_diff(vec![], strings)?;
del_is_empty.insert(document);
}
(Values { numbers, strings }, Null) => {
add_is_null.insert(document);
insert_numbers_diff(numbers, vec![])?;
insert_strings_diff(strings, vec![])?;
}
(Values { numbers, strings }, Empty) => {
add_is_empty.insert(document);
insert_numbers_diff(numbers, vec![])?;
insert_strings_diff(strings, vec![])?;
}
(
Values { numbers: del_numbers, strings: del_strings },
Values { numbers: add_numbers, strings: add_strings },
) => {
insert_numbers_diff(del_numbers, add_numbers)?;
insert_strings_diff(del_strings, add_strings)?;
}
}
}
}
@ -130,14 +221,15 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
}
}
let mut buffer = Vec::new();
let mut facet_exists_docids_writer = create_writer(
indexer.chunk_compression_type,
indexer.chunk_compression_level,
tempfile::tempfile()?,
);
for (fid, bitmap) in facet_exists_docids.into_iter() {
let bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(&bitmap).unwrap();
facet_exists_docids_writer.insert(fid.to_be_bytes(), &bitmap_bytes)?;
for (fid, (del_bitmap, add_bitmap)) in facet_exists_docids.into_iter() {
deladd_obkv_cbo_roaring_bitmaps(&mut buffer, &del_bitmap, &add_bitmap)?;
facet_exists_docids_writer.insert(fid.to_be_bytes(), &buffer)?;
}
let facet_exists_docids_reader = writer_into_reader(facet_exists_docids_writer)?;
@ -146,9 +238,9 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
indexer.chunk_compression_level,
tempfile::tempfile()?,
);
for (fid, bitmap) in facet_is_null_docids.into_iter() {
let bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(&bitmap).unwrap();
facet_is_null_docids_writer.insert(fid.to_be_bytes(), &bitmap_bytes)?;
for (fid, (del_bitmap, add_bitmap)) in facet_is_null_docids.into_iter() {
deladd_obkv_cbo_roaring_bitmaps(&mut buffer, &del_bitmap, &add_bitmap)?;
facet_is_null_docids_writer.insert(fid.to_be_bytes(), &buffer)?;
}
let facet_is_null_docids_reader = writer_into_reader(facet_is_null_docids_writer)?;
@ -157,21 +249,156 @@ pub fn extract_fid_docid_facet_values<R: io::Read + io::Seek>(
indexer.chunk_compression_level,
tempfile::tempfile()?,
);
for (fid, bitmap) in facet_is_empty_docids.into_iter() {
let bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(&bitmap).unwrap();
facet_is_empty_docids_writer.insert(fid.to_be_bytes(), &bitmap_bytes)?;
for (fid, (del_bitmap, add_bitmap)) in facet_is_empty_docids.into_iter() {
deladd_obkv_cbo_roaring_bitmaps(&mut buffer, &del_bitmap, &add_bitmap)?;
facet_is_empty_docids_writer.insert(fid.to_be_bytes(), &buffer)?;
}
let facet_is_empty_docids_reader = writer_into_reader(facet_is_empty_docids_writer)?;
Ok(ExtractedFacetValues {
docid_fid_facet_numbers_chunk: sorter_into_reader(fid_docid_facet_numbers_sorter, indexer)?,
docid_fid_facet_strings_chunk: sorter_into_reader(fid_docid_facet_strings_sorter, indexer)?,
fid_docid_facet_numbers_chunk: sorter_into_reader(fid_docid_facet_numbers_sorter, indexer)?,
fid_docid_facet_strings_chunk: sorter_into_reader(fid_docid_facet_strings_sorter, indexer)?,
fid_facet_is_null_docids_chunk: facet_is_null_docids_reader,
fid_facet_is_empty_docids_chunk: facet_is_empty_docids_reader,
fid_facet_exists_docids_chunk: facet_exists_docids_reader,
})
}
/// Generates a vector of bytes containing a DelAdd obkv with two bitmaps.
fn deladd_obkv_cbo_roaring_bitmaps(
buffer: &mut Vec<u8>,
del_bitmap: &RoaringBitmap,
add_bitmap: &RoaringBitmap,
) -> io::Result<()> {
buffer.clear();
let mut obkv = KvWriterDelAdd::new(buffer);
let del_bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(del_bitmap).unwrap();
let add_bitmap_bytes = CboRoaringBitmapCodec::bytes_encode(add_bitmap).unwrap();
obkv.insert(DelAdd::Deletion, del_bitmap_bytes)?;
obkv.insert(DelAdd::Addition, add_bitmap_bytes)?;
obkv.finish()
}
/// Truncates a string to the biggest valid LMDB key size.
fn truncate_string(s: String) -> String {
s.char_indices()
.take_while(|(idx, _)| idx + 4 < MAX_FACET_VALUE_LENGTH)
.map(|(_, c)| c)
.collect()
}
/// Computes the diff between both Del and Add numbers and
/// only inserts the parts that differ in the sorter.
fn insert_numbers_diff<MF>(
fid_docid_facet_numbers_sorter: &mut Sorter<MF>,
key_buffer: &mut Vec<u8>,
mut del_numbers: Vec<f64>,
mut add_numbers: Vec<f64>,
) -> Result<()>
where
MF: for<'a> Fn(&[u8], &[Cow<'a, [u8]>]) -> StdResult<Cow<'a, [u8]>, Error>,
{
// We sort and dedup the float numbers
del_numbers.sort_unstable_by_key(|f| OrderedFloat(*f));
add_numbers.sort_unstable_by_key(|f| OrderedFloat(*f));
del_numbers.dedup_by_key(|f| OrderedFloat(*f));
add_numbers.dedup_by_key(|f| OrderedFloat(*f));
let merged_numbers_iter = itertools::merge_join_by(
del_numbers.into_iter().map(OrderedFloat),
add_numbers.into_iter().map(OrderedFloat),
|del, add| del.cmp(add),
);
// insert facet numbers in sorter
for eob in merged_numbers_iter {
key_buffer.truncate(TRUNCATE_SIZE);
match eob {
EitherOrBoth::Both(_, _) => (), // no need to touch anything
EitherOrBoth::Left(OrderedFloat(number)) => {
if let Some(value_bytes) = f64_into_bytes(number) {
key_buffer.extend_from_slice(&value_bytes);
key_buffer.extend_from_slice(&number.to_be_bytes());
// We insert only the Del part of the Obkv to inform
// that we only want to remove all those numbers.
let mut obkv = KvWriterDelAdd::memory();
obkv.insert(DelAdd::Deletion, ().as_bytes())?;
let bytes = obkv.into_inner()?;
fid_docid_facet_numbers_sorter.insert(&key_buffer, bytes)?;
}
}
EitherOrBoth::Right(OrderedFloat(number)) => {
if let Some(value_bytes) = f64_into_bytes(number) {
key_buffer.extend_from_slice(&value_bytes);
key_buffer.extend_from_slice(&number.to_be_bytes());
// We insert only the Del part of the Obkv to inform
// that we only want to remove all those numbers.
let mut obkv = KvWriterDelAdd::memory();
obkv.insert(DelAdd::Addition, ().as_bytes())?;
let bytes = obkv.into_inner()?;
fid_docid_facet_numbers_sorter.insert(&key_buffer, bytes)?;
}
}
}
}
Ok(())
}
/// Computes the diff between both Del and Add strings and
/// only inserts the parts that differ in the sorter.
fn insert_strings_diff<MF>(
fid_docid_facet_strings_sorter: &mut Sorter<MF>,
key_buffer: &mut Vec<u8>,
mut del_strings: Vec<(String, String)>,
mut add_strings: Vec<(String, String)>,
) -> Result<()>
where
MF: for<'a> Fn(&[u8], &[Cow<'a, [u8]>]) -> StdResult<Cow<'a, [u8]>, Error>,
{
// We sort and dedup the normalized and original strings
del_strings.sort_unstable();
add_strings.sort_unstable();
del_strings.dedup();
add_strings.dedup();
let merged_strings_iter = itertools::merge_join_by(
del_strings.into_iter().filter(|(n, _)| !n.is_empty()),
add_strings.into_iter().filter(|(n, _)| !n.is_empty()),
|del, add| del.cmp(add),
);
// insert normalized and original facet string in sorter
for eob in merged_strings_iter {
key_buffer.truncate(TRUNCATE_SIZE);
match eob {
EitherOrBoth::Both(_, _) => (), // no need to touch anything
EitherOrBoth::Left((normalized, original)) => {
let truncated = truncate_string(normalized);
key_buffer.extend_from_slice(truncated.as_bytes());
let mut obkv = KvWriterDelAdd::memory();
obkv.insert(DelAdd::Deletion, original)?;
let bytes = obkv.into_inner()?;
fid_docid_facet_strings_sorter.insert(&key_buffer, bytes)?;
}
EitherOrBoth::Right((normalized, original)) => {
let truncated = truncate_string(normalized);
key_buffer.extend_from_slice(truncated.as_bytes());
let mut obkv = KvWriterDelAdd::memory();
obkv.insert(DelAdd::Addition, original)?;
let bytes = obkv.into_inner()?;
fid_docid_facet_strings_sorter.insert(&key_buffer, bytes)?;
}
}
}
Ok(())
}
/// Represent what a document field contains.
enum FilterableValues {
/// Corresponds to the JSON `null` value.
@ -182,6 +409,7 @@ enum FilterableValues {
Values { numbers: Vec<f64>, strings: Vec<(String, String)> },
}
/// Extracts the facet values of a JSON field.
fn extract_facet_values(value: &Value, geo_field: bool) -> FilterableValues {
fn inner_extract_facet_values(
value: &Value,

36
milli/src/update/index_documents/extract/mod.rs
View File

@ -91,9 +91,9 @@ pub(crate) fn data_from_obkv_documents(
let (
docid_word_positions_chunks,
(
docid_fid_facet_numbers_chunks,
fid_docid_facet_numbers_chunks,
(
docid_fid_facet_strings_chunks,
fid_docid_facet_strings_chunks,
(
facet_is_null_docids_chunks,
(facet_is_empty_docids_chunks, facet_exists_docids_chunks),
@ -201,7 +201,7 @@ pub(crate) fn data_from_obkv_documents(
);
spawn_extraction_task::<_, _, Vec<grenad::Reader<File>>>(
docid_fid_facet_strings_chunks,
fid_docid_facet_strings_chunks,
indexer,
lmdb_writer_sx.clone(),
extract_facet_string_docids,
@ -211,7 +211,7 @@ pub(crate) fn data_from_obkv_documents(
);
spawn_extraction_task::<_, _, Vec<grenad::Reader<File>>>(
docid_fid_facet_numbers_chunks,
fid_docid_facet_numbers_chunks,
indexer,
lmdb_writer_sx,
extract_facet_number_docids,
@ -344,7 +344,7 @@ fn send_and_extract_flattened_documents_data(
});
}
let (docid_word_positions_chunk, docid_fid_facet_values_chunks): (Result<_>, Result<_>) =
let (docid_word_positions_chunk, fid_docid_facet_values_chunks): (Result<_>, Result<_>) =
rayon::join(
|| {
let (documents_ids, docid_word_positions_chunk, script_language_pair) =
@ -372,8 +372,8 @@ fn send_and_extract_flattened_documents_data(
},
|| {
let ExtractedFacetValues {
docid_fid_facet_numbers_chunk,
docid_fid_facet_strings_chunk,
fid_docid_facet_numbers_chunk,
fid_docid_facet_strings_chunk,
fid_facet_is_null_docids_chunk,
fid_facet_is_empty_docids_chunk,
fid_facet_exists_docids_chunk,
@ -384,26 +384,26 @@ fn send_and_extract_flattened_documents_data(
geo_fields_ids,
)?;
// send docid_fid_facet_numbers_chunk to DB writer
let docid_fid_facet_numbers_chunk =
unsafe { as_cloneable_grenad(&docid_fid_facet_numbers_chunk)? };
// send fid_docid_facet_numbers_chunk to DB writer
let fid_docid_facet_numbers_chunk =
unsafe { as_cloneable_grenad(&fid_docid_facet_numbers_chunk)? };
let _ = lmdb_writer_sx.send(Ok(TypedChunk::FieldIdDocidFacetNumbers(
docid_fid_facet_numbers_chunk.clone(),
fid_docid_facet_numbers_chunk.clone(),
)));
// send docid_fid_facet_strings_chunk to DB writer
let docid_fid_facet_strings_chunk =
unsafe { as_cloneable_grenad(&docid_fid_facet_strings_chunk)? };
// send fid_docid_facet_strings_chunk to DB writer
let fid_docid_facet_strings_chunk =
unsafe { as_cloneable_grenad(&fid_docid_facet_strings_chunk)? };
let _ = lmdb_writer_sx.send(Ok(TypedChunk::FieldIdDocidFacetStrings(
docid_fid_facet_strings_chunk.clone(),
fid_docid_facet_strings_chunk.clone(),
)));
Ok((
docid_fid_facet_numbers_chunk,
fid_docid_facet_numbers_chunk,
(
docid_fid_facet_strings_chunk,
fid_docid_facet_strings_chunk,
(
fid_facet_is_null_docids_chunk,
(fid_facet_is_empty_docids_chunk, fid_facet_exists_docids_chunk),
@ -413,5 +413,5 @@ fn send_and_extract_flattened_documents_data(
},
);
Ok((docid_word_positions_chunk?, docid_fid_facet_values_chunks?))
Ok((docid_word_positions_chunk?, fid_docid_facet_values_chunks?))
}

34
milli/src/update/index_documents/helpers/merge_functions.rs
View File

@ -193,6 +193,7 @@ pub fn obkvs_keep_last_addition_merge_deletions<'a>(
inner_merge_del_add_obkvs(obkvs, false)
}
/// Do a union of all the CboRoaringBitmaps in the values.
pub fn merge_cbo_roaring_bitmaps<'a>(
_key: &[u8],
values: &[Cow<'a, [u8]>],
@ -205,3 +206,36 @@ pub fn merge_cbo_roaring_bitmaps<'a>(
Ok(Cow::from(vec))
}
}
/// Do a union of CboRoaringBitmaps on both sides of a DelAdd obkv
/// separately and outputs a new DelAdd with both unions.
pub fn merge_deladd_cbo_roaring_bitmaps<'a>(
_key: &[u8],
values: &[Cow<'a, [u8]>],
) -> Result<Cow<'a, [u8]>> {
if values.len() == 1 {
Ok(values[0].clone())
} else {
// Retrieve the bitmaps from both sides
let mut del_bitmaps_bytes = Vec::new();
let mut add_bitmaps_bytes = Vec::new();
for value in values {
let obkv = KvReaderDelAdd::new(value);
if let Some(bitmap_bytes) = obkv.get(DelAdd::Deletion) {
del_bitmaps_bytes.push(bitmap_bytes);
}
if let Some(bitmap_bytes) = obkv.get(DelAdd::Addition) {
add_bitmaps_bytes.push(bitmap_bytes);
}
}
let mut output_deladd_obkv = KvWriterDelAdd::memory();
let mut buffer = Vec::new();
CboRoaringBitmapCodec::merge_into(del_bitmaps_bytes, &mut buffer)?;
output_deladd_obkv.insert(DelAdd::Deletion, &buffer)?;
buffer.clear();
CboRoaringBitmapCodec::merge_into(add_bitmaps_bytes, &mut buffer)?;
output_deladd_obkv.insert(DelAdd::Addition, &buffer)?;
output_deladd_obkv.into_inner().map(Cow::from).map_err(Into::into)
}
}

5
milli/src/update/index_documents/helpers/mod.rs
View File

@ -14,8 +14,9 @@ pub use grenad_helpers::{
};
pub use merge_functions::{
concat_u32s_array, keep_first, keep_latest_obkv, merge_btreeset_string,
merge_cbo_roaring_bitmaps, merge_roaring_bitmaps, obkvs_keep_last_addition_merge_deletions,
obkvs_merge_additions_and_deletions, serialize_roaring_bitmap, MergeFn,
merge_cbo_roaring_bitmaps, merge_deladd_cbo_roaring_bitmaps, merge_roaring_bitmaps,
obkvs_keep_last_addition_merge_deletions, obkvs_merge_additions_and_deletions,
serialize_roaring_bitmap, MergeFn,
};
use crate::MAX_WORD_LENGTH;