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fjall

v3.1.4 Stable

Log-structured, embeddable key-value storage engine

MIT OR Apache-2.0 Edition 2021 MSRV 1.90.0
AlgorithmsData structuresDatabase implementations #database#leveldb#key-value#rocksdb#lsm

Quick Verdict

  • โœ“Actively maintained (updated 41d ago)
  • โœ“Stable API (3.x for 2+ years)
  • โœ“Trusted by 897 crates
  • โœ“Permissive license (MIT OR Apache-2.0)
  • !41% of releases were yanked

Security

Checking security advisories...
Downloads
1.0M
Dependents
897
Releases
94
Size
82KB

Deep Insights

๐Ÿ“‰
Download decline

173.4K downloads in the last 30 days, down 20% from the previous period. May indicate migration to alternatives.

๐Ÿ”—
Moderate adoption

897 crates depend on fjall. Reasonable ecosystem adoption, though not yet a core dependency.

โœ…
Stable for 2+ years

The API has been stable (1.x) for over 2 years with 94 releases. This level of maturity means you can depend on it without worrying about breaking changes.

โš ๏ธ
Notable yanked versions

41% of releases have been yanked. Check version history before pinning.

๐ŸŒŸ
Used by top crates

Notable dependents include pict-rs, armour, brk_indexer, brk_core, hypergraph. When high-quality crates choose fjall, it's a strong quality signal.

Health Breakdown

Maintenance 16/25

Recency, release consistency, active ratio

Quality 15/25

Yanked ratio, deps, size, maturity, features

Community 14/20

Reverse deps, ownership, ecosystem

Popularity 7/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
7K/day avg-40%
05K10K2/263/164/34/215/95/26

Top Dependents

Version Adoption

v3.0.2
75%
v3.0.1
12%
v3.1.4
6%
v3.1.2
5%
v3.1.0
2%

Release Timeline

10 releases1 yankedsince 2026
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2026
10
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Yanked

Feature Flags

default =["lz4"]

lz4*bytes_1metrics__internal_whitebox

README

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Maintainers

Dependencies
12
direct dependencies
Dependents
897
crates depend on fjall

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