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| </pre><pre class="rust"><code><span class="kw">use </span>common::BitSet; |
| <span class="kw">use </span>itertools::Itertools; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::fastfield::AliveBitSet; |
| <span class="kw">use crate</span>::{merge_filtered_segments, Directory, Index, IndexSettings, Segment, SegmentOrdinal}; |
| <span class="doccomment">/// DemuxMapping can be used to reorganize data from multiple segments. |
| /// |
| /// DemuxMapping is useful in a multitenant settings, in which each document might actually belong |
| /// to a different tenant. It allows to reorganize documents as follows: |
| /// |
| /// e.g. if you have two tenant ids TENANT_A and TENANT_B and two segments with |
| /// the documents (simplified) |
| /// Seg 1 [TENANT_A, TENANT_B] |
| /// Seg 2 [TENANT_A, TENANT_B] |
| /// |
| /// You may want to group your documents to |
| /// Seg 1 [TENANT_A, TENANT_A] |
| /// Seg 2 [TENANT_B, TENANT_B] |
| /// |
| /// Demuxing is the tool for that. |
| /// Semantically you can define a mapping from [old segment ordinal, old doc_id] -> [new segment |
| /// ordinal]. |
| </span><span class="attribute">#[derive(Debug, Default)] |
| </span><span class="kw">pub struct </span>DemuxMapping { |
| <span class="doccomment">/// [index old segment ordinal] -> [index doc_id] = new segment ordinal |
| </span>mapping: Vec<DocIdToSegmentOrdinal>, |
| } |
| |
| <span class="doccomment">/// DocIdToSegmentOrdinal maps from doc_id within a segment to the new segment ordinal for demuxing. |
| /// |
| /// For every source segment there is a `DocIdToSegmentOrdinal` to distribute its doc_ids. |
| </span><span class="attribute">#[derive(Debug, Default)] |
| </span><span class="kw">pub struct </span>DocIdToSegmentOrdinal { |
| doc_id_index_to_segment_ord: Vec<SegmentOrdinal>, |
| } |
| |
| <span class="kw">impl </span>DocIdToSegmentOrdinal { |
| <span class="doccomment">/// Creates a new DocIdToSegmentOrdinal with size of num_doc_ids. |
| /// Initially all doc_ids point to segment ordinal 0 and need to be set |
| /// the via `set` method. |
| </span><span class="kw">pub fn </span>with_max_doc(max_doc: usize) -> <span class="self">Self </span>{ |
| DocIdToSegmentOrdinal { |
| doc_id_index_to_segment_ord: <span class="macro">vec!</span>[<span class="number">0</span>; max_doc], |
| } |
| } |
| |
| <span class="doccomment">/// Returns the number of documents in this mapping. |
| /// It should be equal to the `max_doc` of the segment it targets. |
| </span><span class="kw">pub fn </span>max_doc(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.doc_id_index_to_segment_ord.len() <span class="kw">as </span>u32 |
| } |
| |
| <span class="doccomment">/// Associates a doc_id with an output `SegmentOrdinal`. |
| </span><span class="kw">pub fn </span>set(<span class="kw-2">&mut </span><span class="self">self</span>, doc_id: u32, segment_ord: SegmentOrdinal) { |
| <span class="self">self</span>.doc_id_index_to_segment_ord[doc_id <span class="kw">as </span>usize] = segment_ord; |
| } |
| |
| <span class="doccomment">/// Iterates over the new SegmentOrdinal in the order of the doc_id. |
| </span><span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = SegmentOrdinal> + <span class="lifetime">'_ </span>{ |
| <span class="self">self</span>.doc_id_index_to_segment_ord.iter().cloned() |
| } |
| } |
| |
| <span class="kw">impl </span>DemuxMapping { |
| <span class="doccomment">/// Adds a DocIdToSegmentOrdinal. The order of the pus calls |
| /// defines the old segment ordinal. e.g. first push = ordinal 0. |
| </span><span class="kw">pub fn </span>add(<span class="kw-2">&mut </span><span class="self">self</span>, segment_mapping: DocIdToSegmentOrdinal) { |
| <span class="self">self</span>.mapping.push(segment_mapping); |
| } |
| |
| <span class="doccomment">/// Returns the old number of segments. |
| </span><span class="kw">pub fn </span>get_old_num_segments(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.mapping.len() |
| } |
| } |
| |
| <span class="kw">fn </span>docs_for_segment_ord( |
| doc_id_to_segment_ord: <span class="kw-2">&</span>DocIdToSegmentOrdinal, |
| target_segment_ord: SegmentOrdinal, |
| ) -> AliveBitSet { |
| <span class="kw">let </span><span class="kw-2">mut </span>bitset = BitSet::with_max_value(doc_id_to_segment_ord.max_doc()); |
| <span class="kw">for </span>doc_id <span class="kw">in </span>doc_id_to_segment_ord |
| .iter() |
| .enumerate() |
| .filter(|(_doc_id, new_segment_ord)| <span class="kw-2">*</span>new_segment_ord == target_segment_ord) |
| .map(|(doc_id, <span class="kw">_</span>)| doc_id) |
| { |
| <span class="comment">// add document if segment ordinal = target segment ordinal |
| </span>bitset.insert(doc_id <span class="kw">as </span>u32); |
| } |
| AliveBitSet::from_bitset(<span class="kw-2">&</span>bitset) |
| } |
| |
| <span class="kw">fn </span>get_alive_bitsets( |
| demux_mapping: <span class="kw-2">&</span>DemuxMapping, |
| target_segment_ord: SegmentOrdinal, |
| ) -> Vec<AliveBitSet> { |
| demux_mapping |
| .mapping |
| .iter() |
| .map(|doc_id_to_segment_ord| { |
| docs_for_segment_ord(doc_id_to_segment_ord, target_segment_ord) |
| }) |
| .collect_vec() |
| } |
| |
| <span class="doccomment">/// Demux the segments according to `demux_mapping`. See `DemuxMapping`. |
| /// The number of output_directories need to match max new segment ordinal from `demux_mapping`. |
| /// |
| /// The ordinal of `segments` need to match the ordinals provided in `demux_mapping`. |
| </span><span class="kw">pub fn </span>demux( |
| segments: <span class="kw-2">&</span>[Segment], |
| demux_mapping: <span class="kw-2">&</span>DemuxMapping, |
| target_settings: IndexSettings, |
| output_directories: Vec<Box<<span class="kw">dyn </span>Directory>>, |
| ) -> <span class="kw">crate</span>::Result<Vec<Index>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>indices = <span class="macro">vec!</span>[]; |
| <span class="kw">for </span>(target_segment_ord, output_directory) <span class="kw">in </span>output_directories.into_iter().enumerate() { |
| <span class="kw">let </span>alive_bitset = get_alive_bitsets(demux_mapping, target_segment_ord <span class="kw">as </span>u32) |
| .into_iter() |
| .map(<span class="prelude-val">Some</span>) |
| .collect_vec(); |
| <span class="kw">let </span>index = merge_filtered_segments( |
| segments, |
| target_settings.clone(), |
| alive_bitset, |
| output_directory, |
| )<span class="question-mark">?</span>; |
| indices.push(index); |
| } |
| <span class="prelude-val">Ok</span>(indices) |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::collector::TopDocs; |
| <span class="kw">use </span><span class="kw">crate</span>::directory::RamDirectory; |
| <span class="kw">use </span><span class="kw">crate</span>::query::QueryParser; |
| <span class="kw">use </span><span class="kw">crate</span>::schema::{Schema, TEXT}; |
| <span class="kw">use crate</span>::{DocAddress, Term}; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_demux_map_to_alive_bitset() { |
| <span class="kw">let </span>max_value = <span class="number">2</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>demux_mapping = DemuxMapping::default(); |
| <span class="comment">// segment ordinal 0 mapping |
| </span><span class="kw">let </span><span class="kw-2">mut </span>doc_id_to_segment = DocIdToSegmentOrdinal::with_max_doc(max_value); |
| doc_id_to_segment.set(<span class="number">0</span>, <span class="number">1</span>); |
| doc_id_to_segment.set(<span class="number">1</span>, <span class="number">0</span>); |
| demux_mapping.add(doc_id_to_segment); |
| |
| <span class="comment">// segment ordinal 1 mapping |
| </span><span class="kw">let </span><span class="kw-2">mut </span>doc_id_to_segment = DocIdToSegmentOrdinal::with_max_doc(max_value); |
| doc_id_to_segment.set(<span class="number">0</span>, <span class="number">1</span>); |
| doc_id_to_segment.set(<span class="number">1</span>, <span class="number">1</span>); |
| demux_mapping.add(doc_id_to_segment); |
| { |
| <span class="kw">let </span>bit_sets_for_demuxing_to_segment_ord_0 = get_alive_bitsets(<span class="kw-2">&</span>demux_mapping, <span class="number">0</span>); |
| |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_0[<span class="number">0</span>].is_deleted(<span class="number">0</span>), |
| <span class="bool-val">true |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_0[<span class="number">0</span>].is_deleted(<span class="number">1</span>), |
| <span class="bool-val">false |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_0[<span class="number">1</span>].is_deleted(<span class="number">0</span>), |
| <span class="bool-val">true |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_0[<span class="number">1</span>].is_deleted(<span class="number">1</span>), |
| <span class="bool-val">true |
| </span>); |
| } |
| |
| { |
| <span class="kw">let </span>bit_sets_for_demuxing_to_segment_ord_1 = get_alive_bitsets(<span class="kw-2">&</span>demux_mapping, <span class="number">1</span>); |
| |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_1[<span class="number">0</span>].is_deleted(<span class="number">0</span>), |
| <span class="bool-val">false |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_1[<span class="number">0</span>].is_deleted(<span class="number">1</span>), |
| <span class="bool-val">true |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_1[<span class="number">1</span>].is_deleted(<span class="number">0</span>), |
| <span class="bool-val">false |
| </span>); |
| <span class="macro">assert_eq!</span>( |
| bit_sets_for_demuxing_to_segment_ord_1[<span class="number">1</span>].is_deleted(<span class="number">1</span>), |
| <span class="bool-val">false |
| </span>); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_demux_segments() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>first_index = { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| <span class="kw">let </span>text_field = schema_builder.add_text_field(<span class="string">"text"</span>, TEXT); |
| <span class="kw">let </span>index = Index::create_in_ram(schema_builder.build()); |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>(text_field=><span class="string">"texto1"</span>))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>(text_field=><span class="string">"texto2"</span>))<span class="question-mark">?</span>; |
| index_writer.commit()<span class="question-mark">?</span>; |
| index |
| }; |
| |
| <span class="kw">let </span>second_index = { |
| <span class="kw">let </span><span class="kw-2">mut </span>schema_builder = Schema::builder(); |
| <span class="kw">let </span>text_field = schema_builder.add_text_field(<span class="string">"text"</span>, TEXT); |
| <span class="kw">let </span>index = Index::create_in_ram(schema_builder.build()); |
| <span class="kw">let </span><span class="kw-2">mut </span>index_writer = index.writer_for_tests()<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>(text_field=><span class="string">"texto3"</span>))<span class="question-mark">?</span>; |
| index_writer.add_document(<span class="macro">doc!</span>(text_field=><span class="string">"texto4"</span>))<span class="question-mark">?</span>; |
| index_writer.delete_term(Term::from_field_text(text_field, <span class="string">"4"</span>)); |
| |
| index_writer.commit()<span class="question-mark">?</span>; |
| index |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>segments: Vec<Segment> = Vec::new(); |
| segments.extend(first_index.searchable_segments()<span class="question-mark">?</span>); |
| segments.extend(second_index.searchable_segments()<span class="question-mark">?</span>); |
| |
| <span class="kw">let </span>target_settings = first_index.settings().clone(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>demux_mapping = DemuxMapping::default(); |
| { |
| <span class="kw">let </span>max_value = <span class="number">2</span>; |
| <span class="comment">// segment ordinal 0 mapping |
| </span><span class="kw">let </span><span class="kw-2">mut </span>doc_id_to_segment = DocIdToSegmentOrdinal::with_max_doc(max_value); |
| doc_id_to_segment.set(<span class="number">0</span>, <span class="number">1</span>); |
| doc_id_to_segment.set(<span class="number">1</span>, <span class="number">0</span>); |
| demux_mapping.add(doc_id_to_segment); |
| |
| <span class="comment">// segment ordinal 1 mapping |
| </span><span class="kw">let </span><span class="kw-2">mut </span>doc_id_to_segment = DocIdToSegmentOrdinal::with_max_doc(max_value); |
| doc_id_to_segment.set(<span class="number">0</span>, <span class="number">1</span>); |
| doc_id_to_segment.set(<span class="number">1</span>, <span class="number">1</span>); |
| demux_mapping.add(doc_id_to_segment); |
| } |
| <span class="macro">assert_eq!</span>(demux_mapping.get_old_num_segments(), <span class="number">2</span>); |
| |
| <span class="kw">let </span>demuxed_indices = demux( |
| <span class="kw-2">&</span>segments, |
| <span class="kw-2">&</span>demux_mapping, |
| target_settings, |
| <span class="macro">vec!</span>[ |
| Box::new(RamDirectory::default()), |
| Box::new(RamDirectory::default()), |
| ], |
| )<span class="question-mark">?</span>; |
| |
| { |
| <span class="kw">let </span>index = <span class="kw-2">&</span>demuxed_indices[<span class="number">0</span>]; |
| |
| <span class="kw">let </span>segments = index.searchable_segments()<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(segments.len(), <span class="number">1</span>); |
| |
| <span class="kw">let </span>segment_metas = segments[<span class="number">0</span>].meta(); |
| <span class="macro">assert_eq!</span>(segment_metas.num_deleted_docs(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(segment_metas.num_docs(), <span class="number">1</span>); |
| |
| <span class="kw">let </span>searcher = index.reader().unwrap().searcher(); |
| { |
| <span class="kw">let </span>text_field = index.schema().get_field(<span class="string">"text"</span>).unwrap(); |
| |
| <span class="kw">let </span>do_search = |term: <span class="kw-2">&</span>str| { |
| <span class="kw">let </span>query = QueryParser::for_index(index, <span class="macro">vec!</span>[text_field]) |
| .parse_query(term) |
| .unwrap(); |
| <span class="kw">let </span>top_docs: Vec<(f32, DocAddress)> = |
| searcher.search(<span class="kw-2">&</span>query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>)).unwrap(); |
| |
| top_docs.iter().map(|el| el.<span class="number">1</span>.doc_id).collect::<Vec<<span class="kw">_</span>>>() |
| }; |
| |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto1"</span>), <span class="macro">vec!</span>[] <span class="kw">as </span>Vec<u32>); |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto2"</span>), <span class="macro">vec!</span>[<span class="number">0</span>]); |
| } |
| } |
| |
| { |
| <span class="kw">let </span>index = <span class="kw-2">&</span>demuxed_indices[<span class="number">1</span>]; |
| |
| <span class="kw">let </span>segments = index.searchable_segments()<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(segments.len(), <span class="number">1</span>); |
| |
| <span class="kw">let </span>segment_metas = segments[<span class="number">0</span>].meta(); |
| <span class="macro">assert_eq!</span>(segment_metas.num_deleted_docs(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(segment_metas.num_docs(), <span class="number">3</span>); |
| |
| <span class="kw">let </span>searcher = index.reader().unwrap().searcher(); |
| { |
| <span class="kw">let </span>text_field = index.schema().get_field(<span class="string">"text"</span>).unwrap(); |
| |
| <span class="kw">let </span>do_search = |term: <span class="kw-2">&</span>str| { |
| <span class="kw">let </span>query = QueryParser::for_index(index, <span class="macro">vec!</span>[text_field]) |
| .parse_query(term) |
| .unwrap(); |
| <span class="kw">let </span>top_docs: Vec<(f32, DocAddress)> = |
| searcher.search(<span class="kw-2">&</span>query, <span class="kw-2">&</span>TopDocs::with_limit(<span class="number">3</span>)).unwrap(); |
| |
| top_docs.iter().map(|el| el.<span class="number">1</span>.doc_id).collect::<Vec<<span class="kw">_</span>>>() |
| }; |
| |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto1"</span>), <span class="macro">vec!</span>[<span class="number">0</span>]); |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto2"</span>), <span class="macro">vec!</span>[] <span class="kw">as </span>Vec<u32>); |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto3"</span>), <span class="macro">vec!</span>[<span class="number">1</span>]); |
| <span class="macro">assert_eq!</span>(do_search(<span class="string">"texto4"</span>), <span class="macro">vec!</span>[<span class="number">2</span>]); |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |