libmdbx vs RocksDB
libmdbx: Heavily reworked LMDB descendant: memory-mapped ACID B+tree with auto-growing files. RocksDB: Meta's embeddable LSM-tree key-value engine, the storage layer under dozens of databases.
key differences
- Only RocksDB has ttl / expiry, compression.
choose libmdbx for
- +Blockchain node state and indexes
- +Read-heavy embedded storage needing LMDB semantics
- +Replacing LMDB where auto-resizing is needed
best at · Embedded, Metadata
choose rocksdb for
- +Storage engine for a custom database or service
- +Stream-processing state stores (Kafka Streams, Flink)
- +MySQL storage engine via MyRocks
- +Write-heavy local indexes and caches on SSD
best at · Embedded, OLTP, Streaming
libmdbx vs RocksDB: FAQ
What is the difference between libmdbx and RocksDB?
libmdbx: Heavily reworked LMDB descendant: memory-mapped ACID B+tree with auto-growing files. RocksDB: Meta's embeddable LSM-tree key-value engine, the storage layer under dozens of databases. Only RocksDB has ttl / expiry, compression.
When should I choose libmdbx over RocksDB?
Choose libmdbx for blockchain node state and indexes; read-heavy embedded storage needing LMDB semantics; and replacing LMDB where auto-resizing is needed. Choose RocksDB for storage engine for a custom database or service; stream-processing state stores (Kafka Streams, Flink); and MySQL storage engine via MyRocks.
Is libmdbx or RocksDB more popular?
RocksDB ranks #30 on the WhichDB Score (48.2/100) and libmdbx ranks #394 (4.9/100). Popularity is not fit: check the requirements that matter for your project.
Are libmdbx and RocksDB open source?
Yes. libmdbx is open source. License: Apache License 2.0. Yes. RocksDB is open source. License: Apache License 2.0 or GPL-2.0 (dual).