Can you help me with my capacity planning?
I am contemplating purchasing/setting up a 16gb server which will contain 2 5gb instances of mongodb (multi drive replica/shard sets with remote backup with slave reads ok), a 4gb redis instance and a 2 gb postgres instance.
Couple question on this matter:
1) What kinda cpu would be idea for virtualizing and making 4 centos 6 implementations on one computer with 2 mognodb, 1 redis and a postgres instance?
2) Would a 25mb/s connection be fast enough for connecting my webservers to the databases? I.e how often is internet speed the hiderence with a database setup, is 25 goning to make a big difference from 100?
I would rather host this setup in the cloud but that costs way to much monthly especially since the app I am working on has a bit to go before it starts making revenue that I can use to pay for such a thing. Getting a $500 server that will last a long time, makes more sense to me...