공개

2024년 4월 30일

Disaster Recovery(DR)

  • RPO: Recovery Point Objective
    • the maximum acceptable amount of data loss measured in time
  • RTO: Recovery Time Objective
    • the maximum acceptable amount of time to recover the system ## DR Strategies
  • Backup and Restore: Simple but RPO and RTO are high
  • Pilot Light: Minimal version of the environment is always running
  • Warm Standby: A scaled-down version of a fully functional environment is always running
  • Hot-site / Multi-Site Approach: Fully functional environment is always running

Database Migration Service(DMS)

  • migrate data from one database to another
  • source is available during migration
  • Homogeneous Migration: same database engine
  • Heterogeneous Migration: different database engine. must use Schema Conversion Tool(SCT)
  • Continuous Data Replication using CDC
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