A persistent storage system

Clone this repo:

Branches

  1. 0aea911 benchmark: fix the put benchmark by Przemyslaw Pietrzkiewicz · 5 hours ago master
  2. d85608a Disable failing Context.MakeContextUnsafeStack to ublock cq. by Przemyslaw Pietrzkiewicz · 3 hours ago
  3. 91b73ae Optimize btree diff for when a min key is given. by Nelly Vouzoukidou · 8 hours ago
  4. 03011b1 Make the cloud_sync tool into a generic ledger_tool. by Etienne Membrives · 11 hours ago
  5. 62e3a48 Report Ledger test results to TestRunner by Brian Goldman · 6 days ago
88                       88
88                       88
88                       88
88   ,adPPYba,   ,adPPYb,88   ,adPPYb,d8   ,adPPYba,  8b,dPPYba,
88  a8P_____88  a8"    `Y88  a8"    `Y88  a8P_____88  88P'   "Y8
88  8PP"""""""  8b       88  8b       88  8PP"""""""  88
88  "8b,   ,aa  "8a,   ,d88  "8a,   ,d88  "8b,   ,aa  88
88   `"Ybbd8"'   `"8bbdP"Y8   `"YbbdP"Y8   `"Ybbd8"'  88
                              aa,    ,88
                               "Y8bbdP"

Ledger

What is Ledger?

Ledger is a distributed storage system for Fuchsia.

Each application (or more precisely, each component) running on behalf of a particular user has a separate data store provided and managed by Ledger, and vended to a client application by Fuchsia framework through its component context.

The data store for the particular component/user combination is private - not accessible to other apps of the same user, and not accessible to other users of the same app.

Each data store is transparently synchronized across devices of its user through a [cloud provider]. Any data operations are made offline-first with no coordination with the cloud. If concurrent modifications result in a data conflict, the conflict is resolved using an app-configurable merge policy.

Each data store is organized into collections exposing a key-value store API called pages. Page API supports storing data of arbitrary size, atomic changes across multiple keys, snapshots and modification observers.

See docs for documentation.

Repository contents