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This should start or restart MySQL on the VM – please perform this on both VMs separately.
Recovery of MySQL Data
Currently MySQL data backups are stored in the /opt/backups/mysql folder within each VM.
Each day the daily DB dump, from each server, is also copied to an appropriate place on the Data Warehouse machine.
To restore any of these instances of data, locate the appropriate DB dump and go through the mysql restore procedure (documented elsewhere in MySQL documentation)
Security Updates with underlying software and operating systems
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