Struct StorageOptions 

pub struct StorageOptions {
    pub max_open_files: i32,
    pub keep_log_file_num: usize,
    pub write_buffer_size_bytes: Option<usize>,
    pub max_write_buffer_number: Option<i32>,
    pub bloom_filter_bits_per_key: Option<i32>,
}

Operator-tunable rocksdb options. Defaults match what RocksDbStorageEngine::open applied historically (modest max_open_files, capped LOG retention) — production deployments override via the [storage] config section.

Fields

max_open_files: i32

Cap on open SST files. RocksDB’s default of -1 keeps every SST in the table cache forever, which blows past typical FD soft limits in CI / test setups. 64 is plenty for the hot set in the foundational test suites; bump for production read-heavy workloads.

keep_log_file_num: usize

Maximum number of historical INFO log files to keep on disk. RocksDB’s default is 1000 which produces a long tail of LOG.old.* files that compounds disk pressure when many databases run in parallel.

write_buffer_size_bytes: Option<usize>

Per-column-family memtable size (write buffer). Bigger = fewer L0 files + more memory per CF. RocksDB’s default is 64MB; tuning below that helps small / many-tenant deployments, above for write-heavy single-tenant ones. None keeps the upstream default.

max_write_buffer_number: Option<i32>

Maximum number of memtables before writes stall. Bigger = more headroom for write bursts at the cost of memory. RocksDB’s default is 2; 4-8 is common for write-heavy loads. None keeps the upstream default.

bloom_filter_bits_per_key: Option<i32>

Bloom filter bits per key on the block-based table format. Bigger = lower false-positive rate on point reads at the cost of memory. RocksDB’s default builds no bloom filter unless explicitly configured; 10 bits gives ~1% FP rate and is the typical recommendation. None keeps the upstream default (no bloom filter).

Trait Implementations

impl Clone for StorageOptions

fn clone(&self) -> StorageOptions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StorageOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StorageOptions

fn default() -> Self

Returns the “default value” for a type.