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What is the description of the special case of synchronizing RDS Mysql to polardb-x 2.0?
2022-02-04 17:32:11 【Alibaba cloud Q & A】
RDS MySQL Sync to PolarDB-X 2.0 What is the description of the special case of ？
Take the answer 1：
When the source library is self built MySQL when In sync , If the source database switches between active and standby , Will cause the synchronization task to fail . because DTS The delay time of is obtained by comparing the timestamp of the last data synchronized to the target database with the current timestamp , The source library has not been executed for a long time DML Operation may result in inaccurate delay information . If the delay time displayed by the task is too large , You can execute a... In the source library DML Operation to update delay information . explain If the synchronization object is selected as the whole library , You can also create a heartbeat table , The heartbeat table updates or writes data regularly every second .
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