Fjall vs RocksDB
Fjall: Log-structured, embeddable key-value engine in pure Rust with keyspaces and transactions. RocksDB: Meta's embeddable LSM-tree key-value engine, the storage layer under dozens of databases.
key differences
- Only RocksDB has ttl / expiry.
choose fjall for
- +Write-heavy storage inside Rust services
- +Embedded time-series or log storage
- +Replacing RocksDB bindings in Rust code
best at · Embedded, Time-series, 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
Fjall vs RocksDB: FAQ
What is the difference between Fjall and RocksDB?
Fjall: Log-structured, embeddable key-value engine in pure Rust with keyspaces and transactions. RocksDB: Meta's embeddable LSM-tree key-value engine, the storage layer under dozens of databases. Only RocksDB has ttl / expiry.
When should I choose Fjall over RocksDB?
Choose Fjall for write-heavy storage inside Rust services, embedded time-series or log storage and replacing RocksDB bindings in Rust code. 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 Fjall or RocksDB more popular?
RocksDB ranks #30 on the WhichDB Score (48.2/100) and Fjall ranks #215 (15.4/100). Popularity is not fit: check the requirements that matter for your project.
Are Fjall and RocksDB open source?
Yes. Fjall is open source. License: MIT or Apache License 2.0. Yes. RocksDB is open source. License: Apache License 2.0 or GPL-2.0 (dual).