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Apply the chunk compression parameters on all the MTBL writers

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Clément Renault 2020-09-21 18:30:42 +02:00
parent 944df52e2a
commit d21c80b865
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GPG Key ID: 92ADA4E935E71FA4
1 changed files with 20 additions and 2 deletions
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22
src/bin/indexer.rs
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@ -119,6 +119,15 @@ fn lmdb_key_valid_size(key: &[u8]) -> bool {
!key.is_empty() && key.len() <= LMDB_MAX_KEY_LENGTH
}
fn create_writer(type_: CompressionType, level: Option<u32>, file: File) -> Writer<File> {
let mut builder = Writer::builder();
builder.compression_type(type_);
if let Some(level) = level {
builder.compression_level(level);
}
builder.build(file)
}
type MergeFn = fn(&[u8], &[Vec<u8>]) -> Result<Vec<u8>, ()>;
struct Store {
@ -126,6 +135,8 @@ struct Store {
documents_ids: RoaringBitmap,
sorter: Sorter<MergeFn>,
documents_sorter: Sorter<MergeFn>,
chunk_compression_type: CompressionType,
chunk_compression_level: Option<u32>,
}
impl Store {
@ -160,6 +171,8 @@ impl Store {
documents_ids: RoaringBitmap::new(),
sorter: builder.build(),
documents_sorter: documents_builder.build(),
chunk_compression_type,
chunk_compression_level,
}
}
@ -299,10 +312,14 @@ impl Store {
}
fn finish(mut self) -> anyhow::Result<(Reader<Mmap>, Reader<Mmap>)> {
let compression_type = self.chunk_compression_type;
let compression_level = self.chunk_compression_level;
Self::write_word_docids(&mut self.sorter, self.word_docids)?;
Self::write_documents_ids(&mut self.sorter, self.documents_ids)?;
let mut wtr = tempfile::tempfile().map(Writer::new)?;
let wtr_file = tempfile::tempfile()?;
let mut wtr = create_writer(compression_type, compression_level, wtr_file);
let mut builder = fst::SetBuilder::memory();
let mut iter = self.sorter.into_iter()?;
@ -319,7 +336,8 @@ impl Store {
let fst = builder.into_set();
wtr.insert(WORDS_FST_KEY, fst.as_fst().as_bytes())?;
let mut docs_wtr = tempfile::tempfile().map(Writer::new)?;
let docs_wtr_file = tempfile::tempfile()?;
let mut docs_wtr = create_writer(compression_type, compression_level, docs_wtr_file);
self.documents_sorter.write_into(&mut docs_wtr)?;
let docs_file = docs_wtr.into_inner()?;
let docs_mmap = unsafe { Mmap::map(&docs_file)? };