[CatOne]

Ken actually explained the process in a fair bit of detail in the forums a few years back. It was pretty detailed.

Note the content.xml file isn't really the key part… Each client writes a file (which is .zip compressed) for every transaction. The "client" files track which client has received which transaction. When all clients have received a particular set of transactions (up to a point) they are incorporated into the main database file (which is XML) and removed.

This means if you have a client (or multiple) that don't sync for a while, you can get slow syncs as there are lots of small .zip files around that have to be reconciled and compared.

Anyway, I wish I could find Ken's post. Maybe someone will be kind enough to post a link to it. It's here, I just don't know the search terms. It was about 3 years ago, or so.