ETS Speed + DETS Persistence
Microsecond reads from ETS with durable storage on disk via DETS. The classic Erlang persistence pattern, wrapped in a type-safe Gleam API.
shelf
Fast in-memory access with automatic disk persistence for the BEAM.
Features
Section titled “Features”Runtime Type Safety
Decoder-gated loading validates every entry from disk against your Gleam types. Catch corrupted or mistyped data at the storage boundary.
Write Modes
Choose WriteBack for high-throughput batched persistence, or WriteThrough for immediate durability on every write.
Table Types
Set, bag, and duplicate bag tables — all with persistent backing. Pick the right data model for your use case.
Safe Resource Management
The with_table callback ensures tables are always properly closed, even when the body panics or returns an error.
Atomic Counters
Lock-free integer increments via update_counter — increment hit counts or sequence numbers without serialising through an actor.
Cross-process reads
ETS tables are created protected, so any process can read them concurrently while a single owner process handles writes — a natural fit for actor-fronted, read-heavy services.