Which OCI storage service offers a shared file system across multiple compute instances?

The File Storage service in Oracle Cloud Infrastructure (OCI) provides a shared file system that can be accessed by multiple compute instances simultaneously. This service is built for scalability and reliability, allowing applications and services that require a common data access layer to efficiently share and manage files.

File Storage uses the Network File System (NFS) protocol, enabling users to mount file shares on different compute instances securely. This is particularly valuable for workloads that require high availability and fast I/O operations, such as web content management, media processing, and big data analytics.

Other storage options like Local NVMe are designed for high-performance storage tied to a specific compute instance, making them unsuitable for shared access across multiple instances. Object Storage is focused on unstructured data storage with a different access paradigm, primarily for storing and retrieving data as objects rather than as files in a filesystem. Archive Storage, on the other hand, is meant for long-term retention of infrequently accessed data and is not intended for shared, real-time workloads.

Therefore, File Storage is the correct choice as it effectively supports a shared file system architecture across various compute resources, catering to collaborative and distributed applications.