we need help, yesterday we found suddenly in our system, global/pg_filenode.map file missing. DBAs could not login to Database.
We restored the file from backup, but still kept on giving error in log file, but DBA was able to login to Database. We rebooted the server, which stopped the error.
We are trying our best to find, what happened and how did this file went missing. Anyone experienced same issue in past. Any help will be appreciated.