To allow access to Oracle Cloud Infrastructure (OCI) File Storage Service (FSS) for a Database (DB) System with read-only permissions, you should create anNFS export optionthat specifiesREAD_ONLYaccess.
* NFS Export Options:These options define the access permissions (read/write or read-only) for clients connecting to the file system. By setting the export option toREAD_ONLY, you ensure that the DB System can only read from the FSS and cannot modify or delete files.
References:
* Oracle Cloud Infrastructure Documentation:File Storage Service Export Options