In-memory key-value store

A fast key-value store with a durable heart.

Ember serves reads and writes from memory in microseconds and persists to disk in the background, so a restart never loses your data.

Read the documentation →$ ember serve
Ember In-memory·In-memory speed·Background persistence·TTL & eviction·REST API

Capabilities

Microsecond reads

Keys are served straight from memory; a typical GET or SET completes in tens of microseconds.

Durable by design

Writes are appended to a log and snapshotted, so a crash or restart replays cleanly.

TTL & eviction

Set a time-to-live per key and pick an eviction policy when memory runs tight.

Set a key, get it back.

No schema, no setup — start the server and use the API.

  1. 1Start Ember on any host.
  2. 2Set a key with an optional TTL.
  3. 3Read it back over the API.
# start the store $ ember serve --data ./ember # set a key with a 60s ttl $ curl -X PUT :6100/v1/kv/session \ -H 'ttl: 60' -d 'abc123' → ok # read it $ curl /v1/kv/session