Struct DefaultConfig 

pub struct DefaultConfig;

The default configuration for the QBICE engine.

This configuration provides sensible defaults suitable for most applications. It uses:

• Storage: 16-byte inline storage (suitable for small to medium keys)
• Database: RocksDB for persistent storage
• Stable Hasher: SipHash-128 for deterministic query identification
• Standard Hasher: FxHash for fast internal hash maps
• Cache Capacity: 262,144 entries (2^18)
• Writer Threads: 2 background writers

When to Use

DefaultConfig is appropriate for:

• Quick prototyping and development
• Applications with typical query sizes and workload patterns
• Projects that don’t require specialized performance tuning

When to Customize

Consider implementing a custom Config if you need:

• Different inline storage sizes for larger/smaller query keys
• Alternative database backends
• Tuned cache capacities for your workload
• Custom thread pool configurations

Example

use std::sync::Arc;
use qbice::{DefaultConfig, Engine, serialize::Plugin};
use qbice::stable_hash::{SeededStableHasherBuilder, Sip128Hasher};
use qbice::storage::kv_database::rocksdb::RocksDB;

let temp_dir = tempfile::tempdir()?;

// Create an engine with default configuration
let engine = Engine::<DefaultConfig>::new_with(
    Plugin::default(),
    RocksDB::factory(temp_dir.path()),
    SeededStableHasherBuilder::<Sip128Hasher>::new(0),
)?;

// Ready to use!

Trait Implementations

impl Clone for DefaultConfig

fn clone(&self) -> DefaultConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Config for DefaultConfig

Available on crate feature default_config only.

type Database = RocksDB

The key-value database backend used by the engine.

type BuildStableHasher = SeededStableHasherBuilder<SipHasher>

The stable hasher builder used by the engine.

type BuildHasher = BuildHasherDefault<FxHasher>

The standard hasher builder used by the engine.

fn cache_entry_capacity() -> usize

The maximum number of query entries to keep in the in-memory cache.

fn background_writer_thread_count() -> usize

The number of background threads for writing data to the database.

fn rayon_thread_pool_builder() -> ThreadPoolBuilder

Creates a Rayon thread pool builder for parallel query execution.

impl Debug for DefaultConfig

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

Formats the value using the given formatter.

impl Default for DefaultConfig

fn default() -> DefaultConfig

Returns the “default value” for a type.

impl Hash for DefaultConfig

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Identifiable for DefaultConfig

const STABLE_TYPE_ID: StableTypeID

Returns the stable type ID of the type.

impl Ord for DefaultConfig

fn cmp(&self, other: &DefaultConfig) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for DefaultConfig

fn eq(&self, other: &DefaultConfig) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for DefaultConfig

fn partial_cmp(&self, other: &DefaultConfig) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for DefaultConfig

impl Eq for DefaultConfig

impl StructuralPartialEq for DefaultConfig