Before you use Hybrid Backup Recovery (HBR) to back up MySQL databases deployed on ECS instances, you can perform a precheck to identify conditions that may cause backup failure.


  1. Log on to the HBR console.
  2. In the left-side navigation pane, choose Backup > Database Backup.
  3. In the top navigation bar, select a region.
  4. On the Database Backup page, click the MySQL tab.
  5. On the ECS Database Instance tab, find the MySQL instance that you want to precheck, and click Precheck in the Actions column.
  6. In the Precheck dialog box, click Start Check.
    You can click View Last Precheck Result to view the result of the most recent backup precheck. The following table describes the check items of the precheck.
    Check item Description
    OSS connectivity Checks whether the Oracle instance is connected to the VPC Access from ECS (Internal Network) domain of an OSS bucket. If the check fails, you cannot back up or recover the instance.
    Control network connectivity Checks whether the instance is connected to the control network. If the check fails, you cannot manage the database instance.
    Versions that support full backup Checks the versions of the MySQL database that support full backup. MySQL 8.0 does not support incremental backup.
    Binlog Checks whether the binlog parameter of the MySQL instance is correctly configured. If the check fails, you cannot back up the binary logs of the database.
    The precheck process requires about 1 minute. The following figure shows a complete precheck. mysql
    If a check item fails the precheck, check whether the failure affects the backup and recovery of the database.
    • If the failure does not affect the backup and recovery of the database, the precheck is complete.
    • Otherwise, you can read the description in the preceding table to fix the issue.

What to do next

Back up a MySQL database