I created a small JS lib named WebSqlSync to synchronize a local WebSql DB with a server (client <-> server). Very easy to use and to integrate in your code : https://github.com/orbitaloop/WebSqlSync The open source project QuickConnect contains a JS library to synchronize the local HTML5 SQLite DB to a server DB (MySQL or other) … Read more
Better than that looping process, which would block the thread, you could use dispatch group to keep track of when the requests were done. So “enter” the group before issuing each of the requests, “leave” the group when the request is done, and set up a “notify” block/closure that will be called when all of … Read more
You should look at how distributed change management works. Look at SVN, CVS and other repositories that manage deltas work. You have several use cases. Synchronize changes. Your change-log (or delta history) approach looks good for this. Clients send their deltas to the server; server consolidates and distributes the deltas to the clients. This is … Read more
I’ve done something similar to what you’re trying to do. Let me tell you what I’ve learned and how I did it. I assume you have a one-to-one relationship between your Core Data object and the model (or db schema) on the server. You simply want to keep the server contents in sync with the … Read more
The first thing you have to decide is a general policy about which side is considered “authoritative” in case of conflicting changes. I.e.: suppose Record #125 is changed on the server on January 5th at 10pm and the same record is changed on one of the phones (let’s call it Client A) on January 5th … Read more