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Amazon Aurora

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General Features

  • Amazon proprietary technology (NOT OPEN SOURCE)

  • Aurora is "AWS Cloud optimized" It claims 5x performance over MYSQL on RDS and 3x performance over Postgres on RDS

  • Aurora storage grows automatically

  • Aurora can have up to 15 read replicas

  • It is 20% more expensive than RDS. But it is efficient.

  • Automatic failover

  • Backup and Recovery

  • Isolation and security

  • Advanced Monitoring

  • Routine Maintenance

  • Backtrack: restore data at any point of time without using backups

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Aurora High Availability and Read Scaling

  • 6 copies of your data across 3 AZ (4/6 for writes, 3/6 for reads)

  • Self-healing with peer-to-peer replication.

  • Automated failover for master in less than 30 seconds

  • One Aurora instance takes writes (master)

  • Master + up to 15 Aurora Read Replicas serve reads

  • Support cross-region replication

  • Clients when they want to write data, establish a connection with the Writer Endpoint (points to the master) in the case of read data it points to the Reader Endpoint (points to the Load balancer for read instances)

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Security (RDS and Aurora)

  • At-rest Encryption : When it first launched you may set encryption otherwise you need to take snapshot and you need to restore as encrypted

  • In-flight Encryption : TLS ready by default

  • IAM Authentication : IAM roles to connect databases

  • Security Groups : Control network access to RDS and Aurora

  • No SSH available except RDS Custom

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