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How does replication work in Google Cloud SQL?
If a replica is a cross-region replica, you can perform a failover to another region; specifically, you can promote a replica to a standalone instance (in which case, existing replicas would not consider that instance as primary). For more information about how replication works, see Replication in Cloud SQL.
How do I create a replica of MySQL SQL?
Go to the Cloud SQL Instances page Find the instance you want to create a replica for, and open its more actions menu at the far right of the listing. Select Create read replica. If you do not see that choice, the instance is a replica; you cannot create a replica of a replica.
How is parallel replication used in MySQL replication?
In MySQL replication, a replication SQL thread is used to execute the transactions that are collected in the relay log on the read replica. Parallel replication reduces replication lag by increasing the number of SQL threads that work to execute these transactions.
What happens when a table is partitioned on a replica?
DROP PARTITION) acting directly on partitions in such cases may produce different results on source and replica. In the case where a table is partitioned on the source but not on the replica, any statements operating on partitions on the source’s copy of the replica fail on the replica.
Why do I need replication in MySQL database?
Replication is the ability to create copies of a Cloud SQL instance or an on-premises database, and offload work to the copies. The primary reason for using replication is to scale the use of data in a database without degrading performance. Additionally, a replica could be promoted if the original instance becomes corrupted.
What causes replication lag in MySQL SQL Server?
Replication lag occurs when the updates to a read replica fall behind the updates to the primary instance. This section describes how users can enable parallel replication, which can reduce replication lag. In MySQL replication, a replication SQL thread is used to execute the transactions that are collected in the relay log on the read replica.
How to disable replication in a GCloud instance?
Open a replica instance by clicking its name. Click Disable replication in the button bar. Click OK . To execute this cURL command at a command line prompt, you acquire an access token by using the gcloud auth print-access-token command. You can also use the APIs Explorer on the Instances:patch page to send the REST API request.