Sharing a Aerospike / Node.JS on a VPS


Apologies in advance if this is a dumb / noob question!

I’m writing an eCommerce app in Node.JS and want to use Aerospike as a database results cache. Principally I want to run two VPS boxes (perhaps each with 6 cores, 8 gig, 40g SSD), with a load balancer in front of them. Ideally I’d run BOTH the node.js application (limited to 2 cores) and Aerospike (Community) server on the same server and cluster the Aerospike - From this I would get a level of fault tolerance.

The sites the server is serving is relatively low volume - Does the config above sound acceptable, or if running anything else on the Aerospike server a no-no?

Thanks in advance for your thoughts.