redish 0.5.1

A lightweight in-memory key-value database
Documentation 
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use std::collections::BTreeMap;
use bincode::config;
use bincode::config::Configuration;

pub const BINCODE_CONFIG: Configuration = config::standard();
pub const HEADER_MAGIC_NUMBER: &[u8; 4] = b"SSTB";
pub const FOOTER_MAGIC_NUMBER: &[u8; 4] = b"FTTB";
pub const CURRENT_VERSION: u32 = 2;
pub const HEADER_SIZE: usize = 16;
pub const FOOTER_SIZE: usize = 20;
pub const DEFAULT_DB_PATH: &str = "./db";
pub const DEFAULT_MEM_TABLE_SIZE: u32 = 10000;
pub const DEFAULT_WAL_MAX_SIZE: u64 = 10 * 1024 * 1024;
pub const DEFAULT_BLOOM_FILTER_ERROR_PROBABILITY: f64 = 0.01;
pub const DEFAULT_INDEX_CACHE_LRU_MAX_CAPACITY: usize = 100;
pub const DEFAULT_INDEX_CACHE_MEMORY_LIMIT: usize = 100 * 1024 * 1024;
pub const DEFAULT_VALUE_CACHE_LRU_MAX_CAPACITY: usize = 200000;
pub const DEFAULT_VALUE_CACHE_MEMORY_LIMIT: usize = 200 * 1024 * 1024;
pub const CHECKPOINT_ENTRY_SIZE: usize = 19; //crc(4)+op(1)+key_len(4)+key(6)+value_len(4)
pub const VEC_U8_SIZE: usize = size_of::<Vec<u8>>();
pub const BTREEMAP_U8_SIZE: usize = size_of::<BTreeMap<Vec<u8>, u64>>();