Restoring From Backup Index
If a bad index has been replicated from the master to the slaves, you can fix it by restoring a backup index on the master. If replication is on, any changes to the master index will be replicated to the slaves.
When restoring from backup, you must shutdown and restart the master for replication to work properly.
For example, to restore the product index from a backup:
Shutdown the master search server.
Delete the master’s product index located in your deployed search server’s
Copy your backup product index files to
Restart the master server.