Amazon Aurora with MySQL 5.7 支援 GTID

雖然在 AWS 上服務的 HA 大多都不需要自己管理,但備份機制 (甚至異地備援) 還是要自己規劃,Amazon Aurora with MySQL 的 GTID 功能算是讓這塊多了一個選擇:「Amazon Aurora with MySQL 5.7 Compatibility Supports GTID-Based Replication」。

公告裡面有提到 Aurora 自己的 replication 還是用自己的機制,而非透過 GTID 做的:

This provides complete consistency when using binlog replication between an Aurora database and an external MySQL database. Your replication won’t miss transactions or generate conflicts, even after failover or downtime. (Note that replication within an Aurora cluster doesn't use binlog files, so the GTID feature doesn't apply.)

不過就 Aurora 的架構來說,整個 cluster 比較像是看作一個整體,用 binlog + position 應該是夠用的?也不會有 failover 時的 conflict 問題?不確定用 GTID 的好處會在哪邊,還得再想看看...

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