2021-08-16 13:36:30 +02:00
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mod extract_docid_word_positions;
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mod extract_facet_number_docids;
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mod extract_facet_string_docids;
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mod extract_fid_docid_facet_values;
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mod extract_fid_word_count_docids;
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mod extract_word_docids;
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mod extract_word_level_position_docids;
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mod extract_word_pair_proximity_docids;
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use std::collections::HashSet;
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use std::fs::File;
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use crossbeam_channel::Sender;
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2021-08-17 10:56:06 +02:00
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use log::debug;
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2021-08-16 13:36:30 +02:00
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use rayon::prelude::*;
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use self::extract_docid_word_positions::extract_docid_word_positions;
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use self::extract_facet_number_docids::extract_facet_number_docids;
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use self::extract_facet_string_docids::extract_facet_string_docids;
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use self::extract_fid_docid_facet_values::extract_fid_docid_facet_values;
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use self::extract_fid_word_count_docids::extract_fid_word_count_docids;
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use self::extract_word_docids::extract_word_docids;
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use self::extract_word_level_position_docids::extract_word_level_position_docids;
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use self::extract_word_pair_proximity_docids::extract_word_pair_proximity_docids;
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use super::helpers::{
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into_clonable_grenad, keep_first_prefix_value_merge_roaring_bitmaps, merge_cbo_roaring_bitmaps,
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merge_readers, merge_roaring_bitmaps, CursorClonableMmap, GrenadParameters, MergeFn,
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};
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use super::{helpers, TypedChunk};
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use crate::{FieldId, Result};
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/// Extract data for each databases from obkv documents in parallel.
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/// Send data in grenad file over provided Sender.
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pub(crate) fn data_from_obkv_documents(
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obkv_chunks: impl Iterator<Item = Result<grenad::Reader<File>>> + Send,
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indexer: GrenadParameters,
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lmdb_writer_sx: Sender<TypedChunk>,
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searchable_fields: Option<HashSet<FieldId>>,
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faceted_fields: HashSet<FieldId>,
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stop_words: Option<fst::Set<&[u8]>>,
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2021-08-16 13:36:30 +02:00
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) -> Result<()> {
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let result: Result<(Vec<_>, (Vec<_>, Vec<_>))> = obkv_chunks
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.par_bridge()
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.map(|result| {
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let documents_chunk = result.and_then(|c| unsafe { into_clonable_grenad(c) }).unwrap();
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lmdb_writer_sx.send(TypedChunk::Documents(documents_chunk.clone())).unwrap();
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let (docid_word_positions_chunk, docid_fid_facet_values_chunks): (
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Result<_>,
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Result<_>,
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) = rayon::join(
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|| {
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let (documents_ids, docid_word_positions_chunk) = extract_docid_word_positions(
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documents_chunk.clone(),
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indexer.clone(),
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&searchable_fields,
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stop_words.as_ref(),
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)?;
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// send documents_ids to DB writer
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lmdb_writer_sx.send(TypedChunk::NewDocumentsIds(documents_ids)).unwrap();
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// send docid_word_positions_chunk to DB writer
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let docid_word_positions_chunk =
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unsafe { into_clonable_grenad(docid_word_positions_chunk)? };
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lmdb_writer_sx
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.send(TypedChunk::DocidWordPositions(docid_word_positions_chunk.clone()))
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.unwrap();
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Ok(docid_word_positions_chunk)
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},
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|| {
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let (docid_fid_facet_numbers_chunk, docid_fid_facet_strings_chunk) =
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extract_fid_docid_facet_values(
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documents_chunk.clone(),
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indexer.clone(),
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&faceted_fields,
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)?;
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// send docid_fid_facet_numbers_chunk to DB writer
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let docid_fid_facet_numbers_chunk =
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unsafe { into_clonable_grenad(docid_fid_facet_numbers_chunk)? };
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lmdb_writer_sx
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.send(TypedChunk::FieldIdDocidFacetNumbers(
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docid_fid_facet_numbers_chunk.clone(),
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))
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.unwrap();
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// send docid_fid_facet_strings_chunk to DB writer
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let docid_fid_facet_strings_chunk =
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unsafe { into_clonable_grenad(docid_fid_facet_strings_chunk)? };
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lmdb_writer_sx
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.send(TypedChunk::FieldIdDocidFacetStrings(
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docid_fid_facet_strings_chunk.clone(),
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))
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.unwrap();
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Ok((docid_fid_facet_numbers_chunk, docid_fid_facet_strings_chunk))
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},
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);
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Ok((docid_word_positions_chunk?, docid_fid_facet_values_chunks?))
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})
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.collect();
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let (
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docid_word_positions_chunks,
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(docid_fid_facet_numbers_chunks, docid_fid_facet_strings_chunks),
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) = result?;
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spawn_extraction_task(
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docid_word_positions_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_word_pair_proximity_docids,
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merge_cbo_roaring_bitmaps,
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TypedChunk::WordPairProximityDocids,
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"word-pair-proximity-docids",
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);
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spawn_extraction_task(
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docid_word_positions_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_fid_word_count_docids,
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merge_cbo_roaring_bitmaps,
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TypedChunk::FieldIdWordcountDocids,
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"field-id-wordcount-docids",
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);
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spawn_extraction_task(
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docid_word_positions_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_word_docids,
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merge_roaring_bitmaps,
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TypedChunk::WordDocids,
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"word-docids",
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);
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spawn_extraction_task(
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docid_word_positions_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_word_level_position_docids,
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merge_cbo_roaring_bitmaps,
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TypedChunk::WordLevelPositionDocids,
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"word-level-position-docids",
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);
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spawn_extraction_task(
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docid_fid_facet_strings_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_facet_string_docids,
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keep_first_prefix_value_merge_roaring_bitmaps,
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TypedChunk::FieldIdFacetStringDocids,
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"field-id-facet-string-docids",
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);
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spawn_extraction_task(
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docid_fid_facet_numbers_chunks.clone(),
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indexer.clone(),
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lmdb_writer_sx.clone(),
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extract_facet_number_docids,
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merge_cbo_roaring_bitmaps,
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TypedChunk::FieldIdFacetNumberDocids,
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"field-id-facet-number-docids",
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);
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Ok(())
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}
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/// Spawn a new task to extract data for a specific DB using extract_fn.
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/// Generated grenad chunks are merged using the merge_fn.
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/// The result of merged chunks is serialized as TypedChunk using the serialize_fn
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/// and sent into lmdb_writer_sx.
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fn spawn_extraction_task<FE, FS>(
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chunks: Vec<grenad::Reader<CursorClonableMmap>>,
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indexer: GrenadParameters,
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lmdb_writer_sx: Sender<TypedChunk>,
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extract_fn: FE,
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merge_fn: MergeFn,
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serialize_fn: FS,
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name: &'static str,
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) where
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FE: Fn(grenad::Reader<CursorClonableMmap>, GrenadParameters) -> Result<grenad::Reader<File>>
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+ Sync
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+ Send
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+ 'static,
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FS: Fn(grenad::Reader<File>) -> TypedChunk + Sync + Send + 'static,
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{
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rayon::spawn(move || {
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let chunks: Vec<_> = chunks
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.into_par_iter()
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.map(|chunk| extract_fn(chunk, indexer.clone()).unwrap())
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.collect();
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rayon::spawn(move || {
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2021-08-17 10:56:06 +02:00
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debug!("merge {} database", name);
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2021-08-16 13:36:30 +02:00
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let reader = merge_readers(chunks, merge_fn, indexer).unwrap();
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lmdb_writer_sx.send(serialize_fn(reader)).unwrap();
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});
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});
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}
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