I am trying to develop a system in which I will sync my database with 3-Party database by provided API.
The API has format in which we can provide From-Date and To-Date 

**Problems**

1. There is no API which gives me only modified records.
2. The data is too large (1000 records/day average)
3. Need a scheduler so all the records are updated automatically
4. I also need to keep track of modified records(which is the biggest problem as I can't get them by modified date)

**Note :** As per the previous requirement i Have already developed the system in which i can Specify the From-Date and To-Date the record get updated (its completed with the GUI no ajax was uses). and even if I request 1 day records the system get time out error.

**NOTE 2 :** I really should no say but the client is too strict (DUMB);( he just need the solution nothing else will do