Crate mmdb

mmdb

mmdb is a ‘std-collection-like’ database.

This is a simplified version of vsdb, retaining only the most practical and stable parts.

To view the change log check here.

Highlights

• Most APIs is similar as the coresponding data structures in the standard library
  • Use Vecx just like Vec
  • Use Mapx just like HashMap
  • Use MapxOrd just like BTreeMap
• …

Compilation features

• [ DEFAULT ] rocks_backend, use rocksdb as the backend database
  • Stable
  • C++ implementation, difficult to be compiled into a static binary
• parity_backend, use parity-db as the backend database
  • Experimental
  • Pure rust implementation, can be easily compiled into a static binary
• msgpack_codec, use rmp-serde as the codec
  • Faster running speed than json
• json_codec, use serde_json as the codec
  • Better generality and compatibility
• compress, enable compression in the backend database

NOTE

• The serialized result of a mmdb instance can not be used as the basis for distributed consensus
  • The serialized result only contains some meta-information(storage paths, etc.)
  • These meta-information are likely to be different in different environments
  • The correct way is to read what you need from it, and then process the real content

Re-exports

pub use basic::mapx::Mapx;

pub use basic::mapx_ord::MapxOrd;

pub use basic::mapx_ord_rawkey::MapxOrdRawKey;

pub use basic::mapx_ord_rawvalue::MapxOrdRawValue;

pub use basic::orphan::Orphan;

pub use basic::vecx::Vecx;

pub use basic::vecx_raw::VecxRaw;

pub use dagmap::raw::DagMapRaw;

pub use dagmap::rawkey::DagMapRawKey;

pub use dagmap::DagMapId;

pub use common::ende::KeyDe;

pub use common::ende::KeyEn;

pub use common::ende::KeyEnDe;

pub use common::ende::KeyEnDeOrdered;

pub use common::ende::ValueDe;

pub use common::ende::ValueEn;

pub use common::ende::ValueEnDe;

pub use mmdb_core;

Modules

basic

Unversioned functions.

basic_multi_key

Multi-Key kinds of basic structures.

common

Common components

dagmap

Macros

parse_int

Parse bytes to a specified integer type.

parse_prefix

Parse bytes to a Pre type.

Structs

MapxRaw

Constants

GB

KB

MB

NULL

Functions

mmdb_flush

Flush data to disk, may take a long time.

mmdb_get_base_dir

${MMDB_BASE_DIR}

mmdb_get_custom_dir

${MMDB_CUSTOM_DIR}

mmdb_set_base_dir

Set ${MMDB_BASE_DIR} manually.

Type Aliases

RawBytes

RawKey

RawValue