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Code Issues Releases Wiki Activity

Make facet deletion incremental

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This commit is contained in:
Loïc Lecrenier 2022-09-21 15:53:39 +02:00 committed by Loïc Lecrenier
parent 0ade699873
commit 1165ba2171
5 changed files with 182 additions and 100 deletions
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92
milli/src/update/delete_documents.rs
View File

@ -1,4 +1,5 @@
use std::collections::btree_map::Entry;
use std::collections::{HashMap, HashSet};
use fst::IntoStreamer;
use heed::types::{ByteSlice, DecodeIgnore, Str};
@ -8,17 +9,16 @@ use serde::{Deserialize, Serialize};
use serde_json::Value;
use time::OffsetDateTime;
use super::{ClearDocuments, FacetsUpdateBulk};
use super::facet::delete::FacetsDelete;
use super::ClearDocuments;
use crate::error::{InternalError, UserError};
use crate::facet::FacetType;
use crate::heed_codec::facet::{
ByteSliceRef, FacetGroupKeyCodec, FacetGroupValueCodec, FieldDocIdFacetIgnoreCodec,
};
use crate::heed_codec::facet::FieldDocIdFacetCodec;
use crate::heed_codec::CboRoaringBitmapCodec;
use crate::index::{db_name, main_key};
use crate::{
ExternalDocumentsIds, FieldId, FieldIdMapMissingEntry, FieldsIdsMap, Index, Result,
RoaringBitmapCodec, SmallString32, BEU32,
ExternalDocumentsIds, FieldId, FieldIdMapMissingEntry, Index, Result, RoaringBitmapCodec,
SmallString32, BEU32,
};
pub struct DeleteDocuments<'t, 'u, 'i> {
@ -444,13 +444,7 @@ impl<'t, 'u, 'i> DeleteDocuments<'t, 'u, 'i> {
}
for facet_type in [FacetType::Number, FacetType::String] {
remove_docids_from_facet_id_docids(
self.wtxn,
self.index,
&self.to_delete_docids,
fields_ids_map.clone(),
facet_type,
)?;
let mut affected_facet_values = HashMap::new();
for field_id in self.index.faceted_fields_ids(self.wtxn)? {
// Remove docids from the number faceted documents ids
let mut docids =
@ -458,14 +452,24 @@ impl<'t, 'u, 'i> DeleteDocuments<'t, 'u, 'i> {
docids -= &self.to_delete_docids;
self.index.put_faceted_documents_ids(self.wtxn, field_id, facet_type, &docids)?;
remove_docids_from_field_id_docid_facet_value(
let facet_values = remove_docids_from_field_id_docid_facet_value(
&self.index,
self.wtxn,
facet_type,
field_id,
&self.to_delete_docids,
)?;
if !facet_values.is_empty() {
affected_facet_values.insert(field_id, facet_values);
}
}
FacetsDelete::new(
self.index,
facet_type,
affected_facet_values,
&self.to_delete_docids,
)
.execute(self.wtxn)?;
}
// We delete the documents ids that are under the facet field id values.
@ -546,7 +550,7 @@ fn remove_docids_from_field_id_docid_facet_value<'i, 'a>(
facet_type: FacetType,
field_id: FieldId,
to_remove: &RoaringBitmap,
) -> heed::Result<()> {
) -> heed::Result<HashSet<Vec<u8>>> {
let db = match facet_type {
FacetType::String => {
index.field_id_docid_facet_strings.remap_types::<ByteSlice, DecodeIgnore>()
@ -555,19 +559,23 @@ fn remove_docids_from_field_id_docid_facet_value<'i, 'a>(
index.field_id_docid_facet_f64s.remap_types::<ByteSlice, DecodeIgnore>()
}
};
let mut all_affected_facet_values = HashSet::default();
let mut iter = db
.prefix_iter_mut(wtxn, &field_id.to_be_bytes())?
.remap_key_type::<FieldDocIdFacetIgnoreCodec>();
.remap_key_type::<FieldDocIdFacetCodec<ByteSlice>>();
while let Some(result) = iter.next() {
let ((_, docid, _), _) = result?;
let ((_, docid, facet_value), _) = result?;
if to_remove.contains(docid) {
if !all_affected_facet_values.contains(facet_value) {
all_affected_facet_values.insert(facet_value.to_owned());
}
// safety: we don't keep references from inside the LMDB database.
unsafe { iter.del_current()? };
}
}
Ok(())
Ok(all_affected_facet_values)
}
fn remove_docids_from_facet_id_exists_docids<'a, C>(
@ -595,54 +603,6 @@ where
Ok(())
}
fn remove_docids_from_facet_id_docids<'a>(
wtxn: &'a mut heed::RwTxn,
index: &Index,
to_remove: &RoaringBitmap,
fields_ids_map: FieldsIdsMap,
facet_type: FacetType,
) -> Result<()> {
let db = match facet_type {
FacetType::String => {
index.facet_id_string_docids.remap_key_type::<FacetGroupKeyCodec<ByteSliceRef>>()
}
FacetType::Number => {
index.facet_id_f64_docids.remap_key_type::<FacetGroupKeyCodec<ByteSliceRef>>()
}
};
let mut modified = false;
for field_id in fields_ids_map.ids() {
let mut level0_prefix = vec![];
level0_prefix.extend_from_slice(&field_id.to_be_bytes());
level0_prefix.push(0);
let mut iter = db
.as_polymorph()
.prefix_iter_mut::<_, ByteSlice, FacetGroupValueCodec>(wtxn, &level0_prefix)?;
while let Some(result) = iter.next() {
let (bytes, mut value) = result?;
let previous_len = value.bitmap.len();
value.bitmap -= to_remove;
if value.bitmap.is_empty() {
// safety: we don't keep references from inside the LMDB database.
unsafe { iter.del_current()? };
modified = true;
} else if value.bitmap.len() != previous_len {
let bytes = bytes.to_owned();
// safety: we don't keep references from inside the LMDB database.
unsafe { iter.put_current(&bytes, &value)? };
modified = true;
}
}
}
if !modified {
return Ok(());
}
let builder = FacetsUpdateBulk::new_not_updating_level_0(index, facet_type);
builder.execute(wtxn)?;
Ok(())
}
#[cfg(test)]
mod tests {

19
milli/src/update/facet/bulk.rs
View File

@ -29,6 +29,7 @@ pub struct FacetsUpdateBulk<'i> {
group_size: u8,
min_level_size: u8,
facet_type: FacetType,
field_ids: Vec<FieldId>,
// None if level 0 does not need to be updated
new_data: Option<grenad::Reader<File>>,
}
@ -36,20 +37,30 @@ pub struct FacetsUpdateBulk<'i> {
impl<'i> FacetsUpdateBulk<'i> {
pub fn new(
index: &'i Index,
field_ids: Vec<FieldId>,
facet_type: FacetType,
new_data: grenad::Reader<File>,
group_size: u8,
min_level_size: u8,
) -> FacetsUpdateBulk<'i> {
FacetsUpdateBulk { index, group_size, min_level_size, facet_type, new_data: Some(new_data) }
FacetsUpdateBulk {
index,
field_ids,
group_size,
min_level_size,
facet_type,
new_data: Some(new_data),
}
}
pub fn new_not_updating_level_0(
index: &'i Index,
field_ids: Vec<FieldId>,
facet_type: FacetType,
) -> FacetsUpdateBulk<'i> {
FacetsUpdateBulk {
index,
field_ids,
group_size: FACET_GROUP_SIZE,
min_level_size: FACET_MIN_LEVEL_SIZE,
facet_type,
@ -61,7 +72,7 @@ impl<'i> FacetsUpdateBulk<'i> {
pub fn execute(self, wtxn: &mut heed::RwTxn) -> Result<()> {
debug!("Computing and writing the facet values levels docids into LMDB on disk...");
let Self { index, group_size, min_level_size, facet_type, new_data } = self;
let Self { index, field_ids, group_size, min_level_size, facet_type, new_data } = self;
let db = match facet_type {
FacetType::String => {
@ -76,8 +87,6 @@ impl<'i> FacetsUpdateBulk<'i> {
let inner = FacetsUpdateBulkInner { db, new_data, group_size, min_level_size };
let field_ids = index.faceted_fields_ids(wtxn)?.iter().copied().collect::<Box<[_]>>();
inner.update(wtxn, &field_ids, |wtxn, field_id, all_docids| {
index.put_faceted_documents_ids(wtxn, field_id, facet_type, &all_docids)?;
Ok(())
@ -405,7 +414,7 @@ mod tests {
index.verify_structure_validity(&wtxn, 1);
// delete all the elements for the facet id 0
for i in 0..100u32 {
index.delete(&mut wtxn, 0, &(i as f64), i);
index.delete_single_docid(&mut wtxn, 0, &(i as f64), i);
}
index.verify_structure_validity(&wtxn, 0);
index.verify_structure_validity(&wtxn, 1);

92
milli/src/update/facet/delete.rs Normal file
View File

@ -0,0 +1,92 @@
use super::{FACET_GROUP_SIZE, FACET_MAX_GROUP_SIZE, FACET_MIN_LEVEL_SIZE};
use crate::{
facet::FacetType,
heed_codec::facet::{ByteSliceRef, FacetGroupKey, FacetGroupKeyCodec, FacetGroupValueCodec},
update::{FacetsUpdateBulk, FacetsUpdateIncrementalInner},
FieldId, Index, Result,
};
use heed::RwTxn;
use roaring::RoaringBitmap;
use std::collections::{HashMap, HashSet};
pub struct FacetsDelete<'i, 'b> {
index: &'i Index,
database: heed::Database<FacetGroupKeyCodec<ByteSliceRef>, FacetGroupValueCodec>,
facet_type: FacetType,
affected_facet_values: HashMap<FieldId, HashSet<Vec<u8>>>,
docids_to_delete: &'b RoaringBitmap,
group_size: u8,
max_group_size: u8,
min_level_size: u8,
}
impl<'i, 'b> FacetsDelete<'i, 'b> {
pub fn new(
index: &'i Index,
facet_type: FacetType,
affected_facet_values: HashMap<FieldId, HashSet<Vec<u8>>>,
docids_to_delete: &'b RoaringBitmap,
) -> Self {
let database = match facet_type {
FacetType::String => {
index.facet_id_string_docids.remap_key_type::<FacetGroupKeyCodec<ByteSliceRef>>()
}
FacetType::Number => {
index.facet_id_f64_docids.remap_key_type::<FacetGroupKeyCodec<ByteSliceRef>>()
}
};
Self {
index,
database,
facet_type,
affected_facet_values,
docids_to_delete,
group_size: FACET_GROUP_SIZE,
max_group_size: FACET_MAX_GROUP_SIZE,
min_level_size: FACET_MIN_LEVEL_SIZE,
}
}
pub fn execute(self, wtxn: &mut RwTxn) -> Result<()> {
for (field_id, affected_facet_values) in self.affected_facet_values {
if affected_facet_values.len() >= (self.database.len(wtxn)? / 50) {
// Bulk delete
let mut modified = false;
for facet_value in affected_facet_values {
let key =
FacetGroupKey { field_id, level: 0, left_bound: facet_value.as_slice() };
let mut old = self.database.get(wtxn, &key)?.unwrap();
let previous_len = old.bitmap.len();
old.bitmap -= self.docids_to_delete;
if old.bitmap.is_empty() {
modified = true;
self.database.delete(wtxn, &key)?;
} else if old.bitmap.len() != previous_len {
modified = true;
self.database.put(wtxn, &key, &old)?;
}
}
if modified {
let builder = FacetsUpdateBulk::new_not_updating_level_0(
self.index,
vec![field_id],
self.facet_type,
);
builder.execute(wtxn)?;
}
} else {
// Incremental
let inc = FacetsUpdateIncrementalInner {
db: self.database,
group_size: self.group_size,
min_level_size: self.min_level_size,
max_group_size: self.max_group_size,
};
for facet_value in affected_facet_values {
inc.delete(wtxn, field_id, facet_value.as_slice(), &self.docids_to_delete)?;
}
}
}
Ok(())
}
}

48
milli/src/update/facet/incremental.rs
View File

@ -485,20 +485,20 @@ impl FacetsUpdateIncrementalInner {
field_id: u16,
level: u8,
facet_value: &[u8],
docid: u32,
docids: &RoaringBitmap,
) -> Result<DeletionResult> {
if level == 0 {
return self.delete_in_level_0(txn, field_id, facet_value, docid);
return self.delete_in_level_0(txn, field_id, facet_value, docids);
}
let (deletion_key, mut bitmap) =
self.find_insertion_key_value(field_id, level, facet_value, txn)?;
let result = self.delete_in_level(txn, field_id, level - 1, facet_value.clone(), docid)?;
let result = self.delete_in_level(txn, field_id, level - 1, facet_value.clone(), docids)?;
let mut decrease_size = false;
let next_key = match result {
DeletionResult::InPlace => {
bitmap.bitmap.remove(docid);
bitmap.bitmap -= docids;
self.db.put(txn, &deletion_key.as_ref(), &bitmap)?;
return Ok(DeletionResult::InPlace);
}
@ -527,7 +527,7 @@ impl FacetsUpdateIncrementalInner {
if reduced_range {
updated_deletion_key.left_bound = next_key.clone().unwrap();
}
updated_value.bitmap.remove(docid);
updated_value.bitmap -= docids;
let _ = self.db.delete(txn, &deletion_key.as_ref())?;
self.db.put(txn, &updated_deletion_key.as_ref(), &updated_value)?;
if reduced_range {
@ -543,11 +543,11 @@ impl FacetsUpdateIncrementalInner {
txn: &'t mut RwTxn,
field_id: u16,
facet_value: &[u8],
docid: u32,
docids: &RoaringBitmap,
) -> Result<DeletionResult> {
let key = FacetGroupKey { field_id, level: 0, left_bound: facet_value };
let mut bitmap = self.db.get(&txn, &key)?.unwrap().bitmap;
bitmap.remove(docid);
bitmap -= docids;
if bitmap.is_empty() {
let mut next_key = None;
@ -571,7 +571,7 @@ impl FacetsUpdateIncrementalInner {
txn: &'t mut RwTxn,
field_id: u16,
facet_value: &[u8],
docid: u32,
docids: &RoaringBitmap,
) -> Result<()> {
if self
.db
@ -584,7 +584,7 @@ impl FacetsUpdateIncrementalInner {
let highest_level = get_highest_level(&txn, self.db, field_id)?;
let result =
self.delete_in_level(txn, field_id, highest_level as u8, facet_value, docid)?;
self.delete_in_level(txn, field_id, highest_level as u8, facet_value, docids)?;
match result {
DeletionResult::InPlace => return Ok(()),
DeletionResult::Reduce { .. } => return Ok(()),
@ -807,7 +807,7 @@ mod tests {
for i in (200..256).into_iter().rev() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -816,7 +816,7 @@ mod tests {
for i in (150..200).into_iter().rev() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -824,7 +824,7 @@ mod tests {
let mut txn = index.env.write_txn().unwrap();
for i in (100..150).into_iter().rev() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -832,14 +832,14 @@ mod tests {
let mut txn = index.env.write_txn().unwrap();
for i in (17..100).into_iter().rev() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
milli_snap!(format!("{index}"), 17);
let mut txn = index.env.write_txn().unwrap();
for i in (15..17).into_iter().rev() {
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -847,7 +847,7 @@ mod tests {
let mut txn = index.env.write_txn().unwrap();
for i in (0..15).into_iter().rev() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -867,7 +867,7 @@ mod tests {
}
for i in 0..128 {
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -875,7 +875,7 @@ mod tests {
let mut txn = index.env.write_txn().unwrap();
for i in 128..216 {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -883,7 +883,7 @@ mod tests {
let mut txn = index.env.write_txn().unwrap();
for i in 216..256 {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(i as f64), i as u32);
index.delete_single_docid(&mut txn, 0, &(i as f64), i as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -908,7 +908,7 @@ mod tests {
for i in 0..128 {
let key = keys[i];
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(key as f64), key as u32);
index.delete_single_docid(&mut txn, 0, &(key as f64), key as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -917,7 +917,7 @@ mod tests {
for i in 128..216 {
let key = keys[i];
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(key as f64), key as u32);
index.delete_single_docid(&mut txn, 0, &(key as f64), key as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -926,7 +926,7 @@ mod tests {
for i in 216..256 {
let key = keys[i];
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(key as f64), key as u32);
index.delete_single_docid(&mut txn, 0, &(key as f64), key as u32);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -979,7 +979,7 @@ mod tests {
for &key in keys.iter() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &(key as f64), key + 100);
index.delete_single_docid(&mut txn, 0, &(key as f64), key + 100);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -1010,7 +1010,7 @@ mod tests {
for &key in keys.iter() {
index.verify_structure_validity(&txn, 0);
index.delete(&mut txn, 0, &format!("{key:x}").as_str(), key + 100);
index.delete_single_docid(&mut txn, 0, &format!("{key:x}").as_str(), key + 100);
}
index.verify_structure_validity(&txn, 0);
txn.commit().unwrap();
@ -1131,7 +1131,7 @@ mod fuzz {
OperationKind::Delete(value) => {
if let Some(keys) = value_to_keys.get(value) {
for key in keys {
index.delete(&mut txn, *field_id, key, *value as u32);
index.delete_single_docid(&mut txn, *field_id, key, *value as u32);
trivial_db.delete(*field_id, *key, *value as u32);
}
}

31
milli/src/update/facet/mod.rs
View File

@ -74,15 +74,15 @@ pub const FACET_MAX_GROUP_SIZE: u8 = 8;
pub const FACET_GROUP_SIZE: u8 = 4;
pub const FACET_MIN_LEVEL_SIZE: u8 = 5;
use std::fs::File;
use self::incremental::FacetsUpdateIncremental;
use super::FacetsUpdateBulk;
use crate::facet::FacetType;
use crate::heed_codec::facet::{ByteSliceRef, FacetGroupKeyCodec, FacetGroupValueCodec};
use crate::{Index, Result};
use std::fs::File;
pub mod bulk;
pub mod delete;
pub mod incremental;
pub struct FacetsUpdate<'i> {
@ -120,8 +120,11 @@ impl<'i> FacetsUpdate<'i> {
return Ok(());
}
if self.new_data.len() >= (self.database.len(wtxn)? as u64 / 50) {
let field_ids =
self.index.faceted_fields_ids(wtxn)?.iter().copied().collect::<Vec<_>>();
let bulk_update = FacetsUpdateBulk::new(
self.index,
field_ids,
self.facet_type,
self.new_data,
self.group_size,
@ -273,12 +276,12 @@ pub(crate) mod tests {
let key_bytes = BoundCodec::bytes_encode(&key).unwrap();
update.insert(wtxn, field_id, &key_bytes, docids).unwrap();
}
pub fn delete<'a>(
pub fn delete_single_docid<'a>(
&self,
wtxn: &'a mut RwTxn,
field_id: u16,
key: &'a <BoundCodec as BytesEncode<'a>>::EItem,
value: u32,
docid: u32,
) {
let update = FacetsUpdateIncrementalInner {
db: self.content,
@ -287,7 +290,25 @@ pub(crate) mod tests {
max_group_size: self.max_group_size.get(),
};
let key_bytes = BoundCodec::bytes_encode(&key).unwrap();
update.delete(wtxn, field_id, &key_bytes, value).unwrap();
let mut docids = RoaringBitmap::new();
docids.insert(docid);
update.delete(wtxn, field_id, &key_bytes, &docids).unwrap();
}
pub fn delete<'a>(
&self,
wtxn: &'a mut RwTxn,
field_id: u16,
key: &'a <BoundCodec as BytesEncode<'a>>::EItem,
docids: &RoaringBitmap,
) {
let update = FacetsUpdateIncrementalInner {
db: self.content,
group_size: self.group_size.get(),
min_level_size: self.min_level_size.get(),
max_group_size: self.max_group_size.get(),
};
let key_bytes = BoundCodec::bytes_encode(&key).unwrap();
update.delete(wtxn, field_id, &key_bytes, docids).unwrap();
}
pub fn bulk_insert<'a, 'b>(