Example B2B App SaaS Infrastructure

After our hosting provider had internal network issues last week, setting up redundant datacenters became a top priority. After much debate, here’s what we decided on for our new SaaS infrastructure:

• Enterprise-class round robin DNS with automatic fail-over
• Two datacenters with identical infrastructure:
  • One Linux load balancer (1 dual core CPU, 2 GB of RAM)
  • Two Linux app servers (1 quad core CPU, 4 GB of RAM)
  • High-end MySQL database server (2 quad core CPUs, 12 GB of RAM, RAID 5)

The database servers are configured in a master-master replication setup such that each datacenter is fully autonomous.

Now, time to get to work and set things up.