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Temporarily Enable binary logging on production Aurora database cluster #44104

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Dec 17, 2021
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Temporarily Enable binary logging on production Aurora database cluster #44104

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14 changes: 12 additions & 2 deletions aws/cloudformation/db_parameters.yml.erb
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Expand Up @@ -147,8 +147,18 @@ Reporting:

# System variables for the Aurora DB cluster.
AuroraCluster: &aurora
# Disable binary logging to improve write performance.
binlog_format: 'OFF'
# When using row-based logging, the primary database writes events to the binary log that indicate how individual table rows are changed.
# Replication of the primary database to a replica works by copying the events representing the changes to the table rows to the replica.
# ROW required for DMS Change Data Capture:
# https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.MySQL.html#CHAP_Source.MySQL.AmazonManaged
# ROW also required to use gh-ost to carry out online schema changes on large tables:
# https://github.com/github/gh-ost/blob/master/doc/requirements-and-limitations.md
binlog_format: ROW
# When enabled, this variable causes the primary database to write a checksum for each event in the binary log.
# When disabled (value NONE), write and check the event length (rather than a checksum) for each event.
# NONE required for DMS Change Data Capture:
# https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.MySQL.html#CHAP_Source.MySQL.AmazonManaged
binlog_checksum: NONE

# Enable GTIDs: https://aws.amazon.com/blogs/database/amazon-aurora-for-mysql-compatibility-now-supports-global-transaction-identifiers-gtids-replication/
gtid-mode: ON_PERMISSIVE
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