1Z0-1072-25 Question 259
Select 3You are tasked with creating a shared file system in Oracle Cloud Infrastructure (OCI) for a set of compute instances running in a private subnet. The goal is for multiple instances to read and write data concurrently to the same mount point. Which three steps must you complete to configure and mount the File Storage service for these instances?
- A
A. Create a File System and Mount Target in the same Availability Domain (AD) as your compute instances.
- B
B. Add a custom route rule in the private subnet� route table to forward NFS traffic to the Mount Target� private IP address.
- C
C. Configure an export for the file system specifying the path and the source allowed to access the file system.
- D
D. Open the necessary NFS ports (e.g., TCP 111, 2048�2049) in the security list or Network Security Group (NSG) for the Mount Target� subnet.
- E
E. Install an OCI-specific NFS client driver on each compute instance to mount the file system.
Show answer and explanation
Correct answers: A, C, D
Explanation
To share data across multiple compute instances in OCI File Storage, you must create a File System, set up a Mount Target in the same Availability Domain as your instances, define an NFS export with the appropriate source CIDR or subnet, and open the required NFS ports in your security lists or NSGs. Once these steps are complete, you can mount the file system with a standard NFS client. Refer to OCI documentation on 'File Storage' for detailed instructions and best practices, including required network ports and export configurations.
- A. Correct.
A. Correct. Placing the Mount Target in the same Availability Domain as the compute instances is recommended for optimal network performance. The File Storage service is AD-specific, and creating both the File System and Mount Target in the same AD ensures low latency and higher throughput.
- B. Incorrect.
B. Incorrect. Under normal circumstances, you do not need a custom route rule simply for NFS traffic if the Mount Target is in the same VCN and subnet range. Routing is automatically handled as long as the IP addresses are in the same VCN and the security rules allow the traffic. A separate route rule is not required for local traffic.
- C. Correct.
C. Correct. Configuring an export defines which source IP ranges can access the file system and which path they can use. This step is mandatory to allow NFS clients (the compute instances) to mount and use the file system securely.
- D. Correct.
D. Correct. You must allow inbound and outbound NFS protocols on the Mount Target� subnet. By default, NFS requires ports 111 (rpcbind), 2049 (NFS), and additional ephemeral ports for mounting. Failing to open these ports in your security lists or network security groups results in failed mounts.
- E. Incorrect.
E. Incorrect. OCI does not require a proprietary or specialized NFS client driver. Standard Linux or UNIX NFS client packages (e.g., nfs-utils) are sufficient. You simply mount using the Mount Target� private IP address and an NFS mount command.