i have tried using a load balancer with 3 2gb servers and a single db instance, but i need to know i am doing it right
Load balancing is the way to go. Have you considered adding a cache to reduce the pressure? How's the single DB holding so far?
well each instance is running redis , so they get the data from the db server and cache it, is that what you mean?
Yes that's fine. With 1000hit/s I'm assuming this is a read-heavy app, correct? If so, do you have any HTTP caching being done right behind the LB (ex: Varnish)?
its not a read heavy app really mostly configurations on page layout , and i dont have Varnish behind the LB.
do u mean DOMAIN->LB->VARNISH DROPLET->DROPLET
Yes, that's the setup but it doesn't have to be on its own droplet though that's fine.