The new-generation OceanStor hybrid flash storage is designed to support modern cloud-native workloads, including those running in containerized environments. To facilitate the connection between storage resources and container orchestrators like Kubernetes, Huawei supports several key plug-ins:

CSI (Container Storage Interface) (Option D):This is the industry-standard interface that allows the storage system to provide persistent volumes (PVs) to containers. By using the Huawei CSI plug-in, users can automate the provisioning, mounting, and management of LUNs (SAN) and File Systems (NAS) directly from Kubernetes manifests.

CDR (Container Disaster Recovery) (Option A):In addition to basic connectivity, Huawei provides the CDR plug-in to manage data protection for containerized applications. CDR enables backup and disaster recovery capabilities for persistent data, ensuring that if a container cluster or a data center fails, the application data can be recovered at a secondary site using replication or backup technologies.

Plug-ins like CSS or ECS (Options B and C) are generally related to other cloud services or specific compute instances and are not the primary container storage plug-ins associated with the OceanStor hybrid flash series.

NVMe over Fabrics (NVMe-oF) using the RoCE v2 (RDMA over Converged Ethernet) protocol is a high-speed communication technology supported by Huawei OceanStor Dorado systems. Option B is correct because RoCE v2 utilizes RDMA, which allows data to be transferred directly from the memory of one computer to another without involving the CPU of either system. This significantly reduces latency and CPU overhead compared to traditional iSCSI.

Option C is correctbecause RoCE v2 requires a "Lossless Ethernet" environment to function correctly. Traditional Ethernet (Option A) is a "best-effort" delivery system that allows for packet drops during congestion; however, RDMA protocols are highly sensitive to packet loss. To support RoCE v2, the network must implement Data Center Bridging (DCB) features like Priority Flow Control (PFC) and Enhanced Transmission Selection (ETS) to ensure a zero-packet-loss environment. Regarding cost (Option D), RoCE v2 often leverages existing Ethernet infrastructure, making it generally more cost-effective than deploying a dedicated Fibre Channel (FC) fabric, which requires specialized HBAs and FC switches.

Huawei’s 3DC (Three-Data-Center) solution is designed for high-level business continuity, typically involving a local HA site and a remote DR site. The documentation supports three main topological configurations to meet different reliability and performance needs:

Cascading Network (Option B):Site A (Production) replicates to Site B (Local DR), and Site B then replicates to Site C (Remote DR). This reduces the pressure on the production site (Site A) as it only manages one replication link.

Parallel Network (Option C):Site A replicates directly to both Site B and Site C simultaneously. This provides better protection for the data at Site C, but increases the load and bandwidth requirements on Site A.

DR Star Network (Option A):This is a specific variant of the multi-site protection architecture used in Huawei'sHyperMetro + Remote Replicationscenarios. It typically combines an active-active setup between Site A and B with an asynchronous link to Site C, ensuring that even if two sites fail, the third contains a survivable copy of the data.

Huawei OceanStor NAS systems provide a comprehensive Audit Log feature to track user activities for security and compliance purposes. This feature records metadata related to how files and directories are accessed and manipulated over the SMB or NFS protocols.

According to the Huawei technical reference, the audit mechanism captures a wide range of events, including:

File Opening (Option D):Records when a user accesses a file, including the timestamp and user ID.

File Modification (Option B):Tracks changes made to the content of a file.

File Renaming (Option A) and Deletion (Option C):Records structural changes to the file system, which is critical for identifying potential data theft or accidental loss.

By analyzing these logs, administrators can reconstruct the history of file operations to determine "who did what and when." This is a key component of Huawei’s data security framework, helping organizations meet internal auditing requirements and external regulatory standards.

Huawei OceanProtect incorporates specialized algorithms to achieve industry-leading backup and recovery speeds. Source deduplication (Option A) is a primary performance driver because it filters out redundant data at the source, ensuring that only new data blocks are transmitted, which directly reduces the time required to complete a backup job.

Adaptive data locality rearrangement (Option D)is a unique feature that optimizes how data is written to and read from the physical disks within the OceanProtect array. During the backup process, the system calculates data dispersion in real-time and arranges data blocks on the disks to ensure they are stored sequentially. This is critical because it allows for high-speed sequential reads duringdata recovery, significantly improving the performance of HDDs which typically struggle with random I/O. While media deduplication (Option B) and secure snapshots (Option C) are essential for storage efficiency and security, they are not the primary features credited with the raw performance "leap" in backup and recovery speed.

When classifying storage by its underlying architecture rather than its transmission protocol, Huawei distinguishes between two main structures. Centralized SAN (Option D) refers to the traditional controller-based array, such as the OceanStor Dorado or OceanStor Hybrid series. In this architecture, all storage resources are managed by a centralized pair or cluster of controllers within a single enclosure system. This provides high stability and specialized data services but has physical limits on the number of controllers and disks it can scale to.

Distributed SAN (Option B), such as theOceanStor Pacific(formerly FusionStorage), utilizes a scale-out architecture. It aggregates the local storage of multiple standard x86 or ARM servers into a massive, unified virtual storage pool. This architecture eliminates the bottlenecks of centralized controllers, allowing for near-infinite scalability in both performance and capacity by simply adding more nodes. WhileIP SANandFC SANare valid terms, they classify storage by thenetwork protocolused (Ethernet/IP vs. Fibre Channel) rather than the organizational architecture of the storage system itself.

Huawei OceanProtect provides a multi-layered defense to ensure that backup data remains immutable and protected from ransomware attacks. To specifically prevent data tampering and deletion, the following technologies are employed:

WORM (Write Once, Read Many) (Option C):This technology ensures that once data is written to the backup storage, it cannot be modified or deleted by any user (including administrators) until the specified retention period has expired.

Secure Snapshot (Option A):These snapshots are protected by a "read-only" attribute and a retention lock. Unlike standard snapshots, secure snapshots cannot be deleted manually before they expire, providing a reliable point-in-time recovery source even if the primary backup is targeted.

Air Gap (Option B):By physically or logically isolating a copy of the data in an "Air Gap" zone that is disconnected from the network most of the time, Huawei ensures that the data is unreachable for tampering or deletion by attackers who have gained access to the production network.

Detection and analysis (Option D)is part of the solution, but its purpose is toidentifyan ongoing attack or infected files, rather than physically preventing the tampering or deletion of the data itself.