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0. change(db): Use Ribbon filters for database index lookups (#4040) 

* Use Ribbon filters for RocksDB lookups

Ribbon filters are like Bloom filters, but more efficient.

* Fix an outdated comment
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teor 2022-04-07 11:21:02 +10:00 committed by GitHub
parent 1a4f8f6573
commit 7f351ab9af
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1 changed files with 10 additions and 0 deletions
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10
zebra-state/src/service/finalized_state/disk_db.rs
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@ -285,10 +285,17 @@ impl DiskDb {
/// Returns the database options for the finalized state database.
fn options() -> rocksdb::Options {
let mut opts = rocksdb::Options::default();
let mut block_based_opts = rocksdb::BlockBasedOptions::default();
opts.create_if_missing(true);
opts.create_missing_column_families(true);
// Use the recommended Ribbon filter setting for all column families.
// (Ribbon filters are faster than Bloom filters in Zebra, as of April 2022.)
//
// (They aren't needed for single-valued column families, but they don't hurt either.)
block_based_opts.set_ribbon_filter(9.9);
let open_file_limit = DiskDb::increase_open_file_limit();
let db_file_limit = DiskDb::get_db_open_file_limit(open_file_limit);
@ -300,6 +307,9 @@ impl DiskDb {
opts.set_max_open_files(db_file_limit);
// Set the block-based options
opts.set_block_based_table_factory(&block_based_opts);
opts
}