Synchronize 2 SharePoint Libraries on Different Servers -

i need copy or synchronize 2 libraries between 2 different servers. here more details:
1- have infopath form submitted document library, lib #1.
2- infopath form published content type , lib #1 configured deal content type.
3- users have ability add new items lib #1.
4- @ end of each day, or may every hour or so, need copy newly created items or sync lib #1 library on different server.
5- content type available in both servers.

i new sharepoint appreciate if can show me hints on how achieve that.

clarification
don't know route take, thinking of utilizing of these (if possible):
1- replicating database: use replication copy data 1 sharepoint database other
2- file system: not sure if forms saved in file system if are, copy forms 1 server another.
3- programatically: reading sharepoint server events. can program against list item added event , try copy item 1 server anther.
4- built in: may there built in tool not aware of can me copy items.

why want ? if target entirely different server, forms won't open there unless relink documents , have same form template deployed on server.

to job, have 2 options:

1. realtime - use itemadded event handler, copy item target created.

2. timer job - can create timer job run per schedule , copy items 1 library other.

reject db , file system approach. accessing db directly not supported. , these not stored on filesystems. sharepoint api way. can use either in event handler or timer job.