To meet the requirement of backing up boot volumes daily and block volumes every six hours, it is necessary to create separate custom backup policies for each type of volume. Grouping the boot volumes into a volume group and creating a custom backup policy allows the daily backups, while grouping the block volumes and creating a separate custom backup policy allows the backups every six hours. This approach ensures that the different backup schedules are maintained as required.
To allow access to the File Storage Service (FSS), create an NFS export option that allows READ_ONLY access where the source is the CIDR range of the DB System subnet. This ensures that clients in the DB System subnet have the necessary permissions to access the file system in read-only mode. Without this export option, even if the security lists are properly configured, the file system access will be restricted.
To avoid costly service disruptions and ensure data durability even in the case of an outage in one of the Availability Domains or a complete region, the architect should create a replication policy to send data to a different bucket in another OCI region. This approach ensures that the data is stored in multiple geographic locations, providing high availability and fault tolerance.
Object versioning is not enabled at the namespace level; it is enabled at the bucket level. This distinction makes the statement that object versioning is enabled at the namespace level incorrect, whereas the other statements about lifecycle rules, retention rules, and sharing resources across tenancies are accurate for Oracle Cloud Infrastructure Object Storage service.
By default, object versioning is disabled on a bucket. When object versioning is not enabled, new versions of objects are not created upon updates or overwrites, and only the current version of each object is stored. Enabling versioning on a bucket allows you to retain, retrieve, and restore different versions of objects, providing protection against accidental or malicious updates or deletions.