Amazon Aurora로 안전하게 migration 하기
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Amazon Aurora로의 안정적인 마이그레이션 경험을 공유합니다. Aurora에 대해서 궁금하신분, 마이그레이션이 두려우시거나 실패해보신 분을 위한 좋은 자료가 되었으면 합니다. (2018년 9월 19일 AWS KRUG 아키텍쳐 소모임 발표)
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Amazon Aurora로 안전하게 migration 하기
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- 4. . • AWS • Amazon RDS Database • Amazon Aurora • • Amazon Aurora
- 5. Computing : Disk • CPU • HDD • CPU HDD • SSD Reference: Intel newsroom
- 6. Backend Scale-out : RDBMS • Scale-out • RDBMS ( ) • DB Scale-out • Cache Sharding Read Replica
- 7. RDBMS : • RDBMS • ACID • Atomicity: - • Consistency: - • Isolation: - • Durability: -source: Loginworks software
- 8. RDBMS Scale-out ? : Split brain • Sync 2 master node • Sync • DB • Sync (Consistency ) • RDBMS “ ” • Split Brain . source: Trifork blog
- 9. : Split Brain Syndrome • (腦梁梁) • , • . source: Mrs. Eplin's IB Psychology Class Blog
- 10. RDBMS Scale-out ? : • Split brain Master 1 • Master • Master 1 SPOF • Master Scale-up • Scale-up • Sharding…
- 11. NoSQL RDBMS ?: CAP • DBMS 3 2 . • Consistency: . • Availability: . • Partition Tolerance: . source: Wikipedia
- 12. NoSQL RDBMS ? • NoSQL: CAP C A P ! • Consistency RDBMS • Consistency ...
- 13. Database ? • Amazon Aurora AWS ( ) • • AWS Amazon Aurora • (AWS Documentation ...)
- 14. Amazon Aurora Multi-master or Serverless
- 15. Amazon Aurora : Sixshop • Builder ( : WIX) • 2016 AWS • Amazon RDS MySQL • 2 • 10 DAU • DB
- 16. • Downtime • DBMS . • .
- 17. • 1 : DB Snapshot Aurora . • 2 : Aurora Replica Cluster . • Downtime 2
- 18. AS-IS : Spec • Risk . • DBMS • Database Engine Version • Network • DB ( , , ) • DB • DB Parameter
- 19. AS-IS : DBMS Parameter • : RDS Web Console Parameter -> 2 DB -> Compare • : RDS MySQL Parameter 1 , Aurora MySQL 1 , 1 • : encoding, engine, timezone .
- 20. AS-IS : Table Schema • • Schema ( ) • Table ( ) • Table Row Count
- 21. AS-IS : DB • • ? : Sixshop 3~4 • / ? : Sixshop 1~2 • ? : Sixshop • Architecture ? :
- 22. AS-IS : • DB VPC • DB VPC • : DB VPC VPC Peering Connection
- 23. TO-BE: • DB SQL Engine , Instance Tier Aurora • : Aurora MySQL 5.6 . 5.5 RDS MySQL 5.6 • AS-IS Step-by-Step . • AWS Root AS-IS TO-BE Step-by-Step . • : Step Step
- 24. : Step 0 - Migration • DB VPC • DB VPC • : DB VPC VPC Peering Connection
- 25. : Step 1 - Aurora Read Replica , • Aurora Read Replica migration • DB Aurora Cluster slave • Aurora Cluster master ( )
- 26. : Step 1 - Aurora Read Replica , source: AWS Documentation
- 27. : Step 1 - Aurora Read Replica , 1. Source DB Snapshot . 2. 1) Snapshop Aurora Read Replica . (Cluster Instance ) 3. Source DB Read Replica Replication = Source DB Replica Replica . Aurora Read Replica
- 28. : Step 2 - Replica Lag • Replication Replica Lag • Replica Lag 0 • Aurora Query Replica Lag Permission • CloudWatch
- 29. : Step 2 - Replica Lag : https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Aurora.Monitoring.html
- 30. : Step 3 - Replica Lag 0 WAS • Replica Lag 0 DB • DB Write Transaction • • DB Write Transaction • WAS ELB
- 31. : Step 3 - Replica Lag 0 WAS • DB Row Count • Row Count • • Row Count Step SELECT CONCAT( 'SELECT "', table_name, '" AS table_name, COUNT(*) AS exact_row_count FROM `', table_schema, '`.`', table_name, '` UNION ' ) FROM INFORMATION_SCHEMA.TABLES WHERE table_schema = '<my table schema>';
- 32. : Step 4 - Aurora Master (Promote) • • DB Promote DB Cluster role • : Promote DB Query ! (Binary Log )
- 33. : Step 5 - Aurora Connection • WAS DB Endpoint DB • DB , ELB • DB Rollback
- 34. • Sixshop 2 ( 11GB) • DB • • • • & ( ) • DBMS Parameter • Amazon Aurora . .