Case of a large domestic game developers, there are more than 130 IDC deploy MySQL instance, storage totaled 20 t, due to business needs, will all instance migration to tencent cloud CDB for MySQL, in order to ensure the business migration, the migration process, the tool has carried on the preliminary investigation and study, and found in the process of the four big problems to solve in time, the following is the actual migration experience sharing:
1, the process of test cases/
Cloud on the developers at present (external MySQL migrated to CDB) offers a variety of solutions, including developers MySQL instance has the network IP can be used directly tencent cloud database migration tool to complete the migration (other migration methods, see: https://www.qcloud.com/doc/product/236/591), the developers in the migration task all MySQL instance of a proxy IP networks outside for use, thus directly select the migration tool to complete the data import,
2, the Lord, and from the machine and the last build master-slave synchronization
3, multi-instance + larger binlog concurrent synchronous
Developers migration test data record
Above, after the completion of our internal test developers to migrate for three times, the relevant data is as follows:
Once the bandwidth of the migration,

As developers export bandwidth only about 500 MBPS, after tests found migration bottleneck mainly appeared on the bandwidth limitations, actual concurrent bandwidth for phase ii migration to confirm size,

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