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https://github.com/meilisearch/MeiliSearch
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Hard or soft delete according to the deletion strategy
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@ -186,33 +186,39 @@ impl<'t, 'u, 'i> DeleteDocuments<'t, 'u, 'i> {
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soft_deleted_docids |= &self.to_delete_docids;
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soft_deleted_docids |= &self.to_delete_docids;
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// if we have less documents to delete than the threshold we simply save them in
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// decide for a hard or soft deletion depending on the strategy
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// the `soft_deleted_documents_ids` bitmap and early exit.
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let soft_deletion = match self.strategy {
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let size_used = self.index.used_size()?;
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DeletionStrategy::Dynamic => {
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let map_size = self.index.env.map_size()? as u64;
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// if we have less documents to delete than the threshold we simply save them in
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let nb_documents = self.index.number_of_documents(self.wtxn)?;
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// the `soft_deleted_documents_ids` bitmap and early exit.
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let nb_soft_deleted = soft_deleted_docids.len();
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let size_used = self.index.used_size()?;
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let map_size = self.index.env.map_size()? as u64;
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let nb_documents = self.index.number_of_documents(self.wtxn)?;
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let nb_soft_deleted = soft_deleted_docids.len();
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let percentage_available = 100 - (size_used * 100 / map_size);
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let percentage_available = 100 - (size_used * 100 / map_size);
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let estimated_document_size = size_used / (nb_documents + nb_soft_deleted);
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let estimated_document_size = size_used / (nb_documents + nb_soft_deleted);
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let estimated_size_used_by_soft_deleted = estimated_document_size * nb_soft_deleted;
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let estimated_size_used_by_soft_deleted = estimated_document_size * nb_soft_deleted;
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let percentage_used_by_soft_deleted_documents =
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let percentage_used_by_soft_deleted_documents =
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estimated_size_used_by_soft_deleted * 100 / map_size;
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estimated_size_used_by_soft_deleted * 100 / map_size;
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// if we have more than 10% of disk space available and the soft deleted
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// if we have more than 10% of disk space available and the soft deleted
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// documents uses less than 10% of the total space available,
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// documents uses less than 10% of the total space available,
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// we skip the deletion. Eg.
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// we skip the deletion. Eg.
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// - With 100Go of disk and 20Go used including 5Go of soft-deleted documents
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// - With 100Go of disk and 20Go used including 5Go of soft-deleted documents
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// We don’t delete anything.
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// We don’t delete anything.
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// - With 100Go of disk and 95Go used including 1mo of soft-deleted documents
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// - With 100Go of disk and 95Go used including 1mo of soft-deleted documents
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// We run the deletion.
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// We run the deletion.
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// - With 100Go of disk and 50Go used including 15Go of soft-deleted documents
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// - With 100Go of disk and 50Go used including 15Go of soft-deleted documents
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// We run the deletion.
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// We run the deletion.
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percentage_available > 10 && percentage_used_by_soft_deleted_documents < 10
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}
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DeletionStrategy::AlwaysSoft => true,
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DeletionStrategy::AlwaysHard => false,
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};
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if !self.disable_soft_deletion
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if soft_deletion {
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&& percentage_available > 10
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// Keep the soft-deleted in the DB
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&& percentage_used_by_soft_deleted_documents < 10
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{
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self.index.put_soft_deleted_documents_ids(self.wtxn, &soft_deleted_docids)?;
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self.index.put_soft_deleted_documents_ids(self.wtxn, &soft_deleted_docids)?;
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return Ok(DetailedDocumentDeletionResult {
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return Ok(DetailedDocumentDeletionResult {
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deleted_documents: self.to_delete_docids.len(),
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deleted_documents: self.to_delete_docids.len(),
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