I'm looking for a solution to make sure my site stays accessible as much as possible on a long term basic, what i might need is just a simple DNS management solution (I don't know but i would like your help).
We have a Primary Server
We plan to do r-sync (to synchronize the file) and also another solution to sync(backup) the MYSQL database.
IF our site goes down we've setup instant SMS/Email notification.
So i'm looking for the best solution to switch to the backup server almost instantaneously.
I know that i can setup multiple name-servers but as far as i understand they can timeout or it can take 2-5 sec to load which in both cases i want to avoid.
So what's the best solution for me to use?
Also once the primary server becomes available how can I make sure it get's the db/file edits that were done on the backup server?