Does JetBackup lock tables when it performs MySql Backups?

JetBackup uses "mysqldump" to export the databases.

There are several flags in which you can set as desired:

  • Max allowed packets
  • force flag
  • opt flag
  • skip lock table

These settings could be found under "Settings -> Performance Settings".

MySqlPerformanceSetting

So to make sure mysqldump will lock tables, you need to uncheck the "skip-lock" flag in there.