Tencent/MMKV
MMKV
MMKV is a high-performance, cross-platform key-value storage framework designed for mobile platforms and POSIX environments, including Android, iOS, macOS, and Windows. It provides a persistence layer that utilizes memory-mapped files and binary serialization to achieve low-latency data access.
The project distinguishes itself through native support for multi-process synchronization, allowing concurrent read and write operations across different application processes. It also implements security via AES encryption for data at rest, featuring symmetric encryption and key rotation to protect stored values.
The framework includes capabilities for data migration from platform-specific preference stores, such as shared preferences and user defaults. Additional functionality covers storage governance through instance-based isolation, time-to-live expiration for keys, and tools for disk space reclamation, backup and recovery, and data integrity validation.
The library provides utilities for custom log routing and external content monitoring to track modifications triggered by other processes.
Features
- Memory-Mapped File Access - Uses memory-mapped files to map storage directly into virtual memory for high-speed data access.
- Key-Value Persistence Stores - Provides a high-performance key-value persistence store for mobile devices using memory-mapped files.
- Cross-Platform Storage Frameworks - Provides a consistent data persistence layer across Android, iOS, macOS, and Windows.
- Inter-Process Data Synchronization - Implements native synchronization to allow concurrent read and write operations across different application processes.
- Key-Value Stores - Provides a lightweight, non-relational key-value persistence layer optimized for mobile application state.
- Process-Level Synchronization - Synchronizes concurrent read and write operations across different processes to maintain a consistent state.
- Data Encryption - Secures stored key-value pairs at rest using symmetric AES encryption.
- Encrypted Persistence - Provides encrypted local storage persistence using AES encryption to secure application data at rest.
- Storage Synchronization - Coordinates concurrent read and write operations across multiple processes to ensure data consistency.
- Multi-Process Data Stores - Ships a storage system that synchronizes concurrent read and write operations across multiple application processes.
- Append-Only Storage Engines - Implements an append-only storage architecture to maximize write throughput and performance.
- Redundant Write Prevention - Minimizes I/O operations by comparing new values against existing ones before committing writes to disk.
- Data Recovery - Allows registration of custom recovery strategies to handle corrupted data or invalid file lengths.
- Protocol Buffers - Uses a binary Protocol Buffer format to encode key-value pairs for compact disk representation.
- Storage Integrity Validation - Uses checksums to detect data corruption in persistent storage and trigger recovery handlers.
- Migration Importers - Includes utilities for importing data from platform-specific user preference stores.
- Preference Store Migrators - Provides a tool to import existing data from Android SharedPreferences for a seamless transition.
- Native Buffer Transfers - Optimizes performance by passing large values using native memory buffers to avoid expensive data copying.
- Preference Store Migrations - Includes utilities to migrate existing data from Android SharedPreferences and iOS User Defaults into the framework.
- Database Libraries - Efficient key-value storage for mobile platforms.
Star history
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