Bazaarvoice's service oriented architecture

** monolithic java app to set of small services ** Cassandra as system of record (multi-region replication) ** ElasticSearch replaced Solr (same reason) ** formed platform infrastructure team

• build out using VPC and CloudFormation
• internal VPC DNS
• internal monitoring
• centralized logging
• cost analytics using tags, able to determine exact cost per team
• tag-conformity enforcement each team must use two tags: team and VPC any AWS resource without proper tags is automatically terminated
• spin up identical VPCs for dev, QA, and prod
• three AZ per VPC, one NAT server per AZ for outbound connections ** data team
• EmoDB backed by Cassandra exposes RESTful API to create tables
• Polloi indexes entity streams into an ElasticSearch cluster
• databus to tie EmoDB to Polloi, and any other application to listen to changes to the data