dwaal. A dreamy, dazed, absent-minded, or befuddled state. Wiktionary
Dwaal is a persisted key-value storage for Node JS that can be shared by several processes on the same local machine.
const Storage = ;const storage =path: 'directory/that/exists';// Get somethingstorage;// Set somethingstorage;
Dwaal connects processes that use the same storage together via a Unix socket and elects a process to leader that is responsible for managing the storage. This leader keeps an in-memory map with all of the data and handles requests from other processes that want to get or set data.
When the data in the storage changes it is lazily written around every 500 ms. Data is always written atomically to minimize the chance of the storage file being corrupted.