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Level/levelupArchived

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4,072 Stars·265 Forks·JavaScript·MIT·2 Aufrufe

Levelup

Levelup ist ein sortiertes Key-Value-Speichersystem, das Daten unter Verwendung von Byte-Arrays als Keys und Values speichert und abruft. Es bietet eine Kompatibilitätsschicht für Node.js und Browser, die ein einheitliches Interface für Speicher-Backends gemäß einem spezifischen abstrakten Standard bereitstellt.

Das Projekt verfügt über eine atomare Batch-Write-Engine, um mehrere Schreib- und Löschoperationen als eine einzige Einheit für Datenkonsistenz auszuführen. Es enthält einen bereichsbasierten Daten-Streamer zum Lesen von Keys und Values als kontinuierliche Sequenzen sowie einen ereignisgesteuerten Speicher-Monitor zur Verfolgung asynchroner Updates und Zustandsänderungen.

Das System deckt breitere Datenbank-Primitive ab, einschließlich bereichsbasiertem Löschen von Daten und Backend-Engine-Abstraktion, um einen konsistenten Befehlssatz über verschiedene Laufzeitumgebungen hinweg beizubehalten.

Features

  • Key-Value - Provides a high-performance key-value storage system that uses raw byte arrays for platform-independent data retrieval.
  • Database Atomic Batches - Implements a mechanism to group multiple write and delete operations into a single atomic operation for data consistency.
  • LSM-Tree Batch Writes - Groups multiple mutations into a single atomic commit to ensure data consistency and reduce write amplification.
  • Cursor-Based Iteration - Implements a cursor mechanism for traversing sorted data sequences with support for bidirectional movement and pagination.
  • Lexicographical Range Reads - Allows the retrieval of all keys and values within a specific byte-sorted range using streaming and limits.
  • Atomic Transactions - Executes multiple data manipulation operations as a single atomic unit to ensure consistency.
  • Backend Compatibility Layers - Provides a compatibility layer for Node.js and browsers to interface with abstract-leveldown compliant backends.
  • Sorted - Enables the reading of keys and values as continuous sequences via range bounds and result limits.
  • Sorted Key-Value Maps - Provides a key-value store that maintains entries sorted by key to enable efficient range queries.
  • Storage Abstraction - Offers a middleware layer that provides a unified interface for interacting with different underlying storage backends.
  • Storage Backend Adapters - Provides an interface to interact with diverse storage engines using a consistent set of commands.
  • Storage Backend Adapters - Provides a unified interface that translates consistent commands into specific API calls for different storage backends.
  • Range Deletions - Allows the removal of specific data segments by defining upper and lower key boundaries.
  • Storage Event Notifications - Ships an event-driven monitor to track asynchronous updates and state changes within the data store.
  • Store Event Listeners - Implements a notification system using event listeners to react to asynchronous updates and state changes in the store.
  • Database Drivers - LevelDB interface.
  • Datenbanken - LevelDB client.

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Häufig gestellte Fragen

Was macht level/levelup?

Levelup ist ein sortiertes Key-Value-Speichersystem, das Daten unter Verwendung von Byte-Arrays als Keys und Values speichert und abruft. Es bietet eine Kompatibilitätsschicht für Node.js und Browser, die ein einheitliches Interface für Speicher-Backends gemäß einem spezifischen abstrakten Standard bereitstellt.

Was sind die Hauptfunktionen von level/levelup?

Die Hauptfunktionen von level/levelup sind: Key-Value, Database Atomic Batches, LSM-Tree Batch Writes, Cursor-Based Iteration, Lexicographical Range Reads, Atomic Transactions, Backend Compatibility Layers, Sorted.

Welche Open-Source-Alternativen gibt es zu level/levelup?

Open-Source-Alternativen zu level/levelup sind unter anderem: google/leveldb — LevelDB is an embedded database library and persistent storage engine that provides a sorted key-value store. It uses… apple/foundationdb — FoundationDB is an ACID-compliant distributed transactional key-value store. It functions as a scalable database… facebook/rocksdb — RocksDB is a high-performance, embeddable persistent key-value library and storage engine based on Log-Structured… rosedblabs/rosedb — RoseDB is a persistent key-value database and log-structured storage engine. It functions as a lightweight storage… spacejam/sled — Sled is an embedded key-value store and ACID-compliant database designed for high-performance data persistence. It… noderedis/node-redis — node-redis is a Node.js client and database driver for interacting with Redis key-value stores. It functions as a…