Server Duplication Software

[delphin460]

ok , i wanna run 2 backup servers , these servers will be in seperate building on the same network

what im looking for is software that will backup select open files eg accounting and pos files during the day to these 2 seperate servers, but must be exact in what they backup, i think they call this a redundant server

eg if there is a fire in one building and one server gets fried, we still have all the backups on the other server

i know its a big ask , but if anyone has any ideas on software that is capable of such a thing

i would be greatfull

i dont think the run of the mill backup software is capable of auto backup of open files to seperate servers

[4play]

what servers are we talking about here

rsync might be worth a look.