This page hosts the detailed specification for the ​Blueprint for the Synchronisation.

We need to be able to support synchronising data between instances

In S2 this is done by record ids being UUIDs (Universally Unique IDs) built from each instance's 'base_uuid'

There is a sync_instance table:

CREATE TABLE sync_instance (
    base_uuid VARCHAR(4) NOT NULL, -- Instance id
    owner VARCHAR(100), -- Instance owner's name
    contact TEXT, -- Contact details of the instance owner
    url VARCHAR(100) DEFAULT NULL, -- Server url if exists
    last_update TIMESTAMP NOT NULL, -- Last Time sync with the instance
    sync_count INT DEFAULT 0, -- Number of times synchronized
    PRIMARY KEY(base_uuid)
);