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DateiLager

Dateilager is a content-addressed, networked filesystem for keeping large, similar directories among a wide variety of hosts. It has a few key properties:

  • file contents and versions are stored in by a central server, with readers and writers as clients
  • files and trees of files are stored only once in a content-addressed store by the server for efficiency, but are still served securely to only clients with access
  • readers and writers keep a copy of the filesystem synced locally for very fast local access (and trade off consistency or atomicity)
  • incremental updates by readers are O(changes) and optimized to be very fast
  • one Dateilager server supports storing many different independent filesystems with secured access to each (multi-tenancy)

Dateilager is used in production to power https://gadget.dev to sync the filesystems for all the apps on the Gadget platform. Dateilager shines at syncing the (often very large) node_modules folder shared between the many node.js applications, as well as the comparatively small .js files comprising the actual business logic of one particular app.

Docs

You can read more about DateiLager's design in the docs/ directory. A good place to start is the core concepts file.

Contributing

See the development documentation in Contributing.md