Huawei H19-308_V4.0 Exam Dumps

Huawei distinguishes Scale-out Storage (OceanStor Pacific) from traditional Array Storage (Centralized SAN/NAS) based on its ability to handle the 'Yottabyte Era' requirements of mass data.

Large Volume (Option A): While traditional arrays are limited by the number of controllers and disk enclosures they can address, scale-out storage is designed to aggregate thousands of nodes into a single global namespace, easily managing 10 PB or even EB-level data volumes.

TB-level Bandwidth (Option C): Distributed storage excels at throughput. By utilizing a high-speed interconnected network (InfiniBand or RoCE) and parallel access protocols like DPC, a scale-out cluster can deliver aggregate bandwidth in the range of TB/s, which is critical for HPC and big data analytics.

Elastic Scalability (Option D): Traditional arrays typically scale out to a few dozen controllers. OceanStor Pacific can scale out to 4,096 nodes in a single cluster, providing linear growth in both performance and capacity as nodes are added.

Performance in IOPS (Option B) is not a difference in the sense that both systems provide IOPS; however, centralized all-flash arrays (Dorado) are often superior for low-latency, high-IOPS structured databases, whereas scale-out storage is primarily defined by its massive bandwidth and capacity scalability.

The statement is False because Huawei OceanStor Pacific is a multi-protocol storage system that supports more than just the three mentioned protocols. While File (NFS/CIFS), Object (S3), and HDFS are the core protocols for mass data access, the system also supports:

DPC (Distributed Parallel Client): A specialized parallel file system interface that supports standard POSIX and MPI-IO, enabling high-performance computing (HPC) clients to connect directly to multiple storage nodes for balanced I/O.

Block Storage: Certain configurations of OceanStor Pacific can provide block storage services, making it a truly unified distributed platform.

S3 Versioning and Advanced Object APIs: It supports native S3 semantics for object versioning and other advanced cloud-native features.

Because it supports high-performance parallel interfaces (POSIX/MPI-IO) via DPC in addition to the standard protocols, it is technically incorrect to say it supports only three types.

This statement is false because RAID 0 and Mirroring (RAID 1) are fundamentally different concepts in Huawei storage technology. As defined in the Huawei technical manual, RAID 0 is 'Striping.' It breaks data into chunks and spreads them across multiple disks to increase performance. It has no redundancy.

'Mirroring' is the terminology specifically used for RAID 1. In a RAID 1 configuration, the system writes the exact same data to two separate physical disks simultaneously. This creates a 100% redundant copy (a mirror). If one disk fails, the other continues to provide data, ensuring zero downtime and no data loss. Huawei's RAID 2.0+ virtualization technology can implement striping and mirroring across different 'chunks' or 'extents' within a storage pool, but it maintains the technical distinction: RAID 0 is for performance through striping, while mirroring is for reliability through duplication. Therefore, characterizing RAID 0 as a mirroring technology is a technical inaccuracy.

This statement is false because the Air Gap isolation zone is one of the most critical components of the Huawei OceanProtect ransomware protection solution. Huawei provides a comprehensive 'four-layer' protection framework for data resilience, where Air Gap technology serves as the final, most secure layer.

The Air Gap feature creates a security isolation zone for backup data. Under normal operations, the replication link between the production backup storage and the isolation zone storage is physically or logically disconnected (the 'gap'). The link only opens during a specific, scheduled window to replicate 'clean' data from the production site to the isolation zone, and it is immediately closed once replication is finished. This ensures that even if ransomware compromises the main network and production storage, the data in the Air Gap isolation zone remains 'invisible' and unreachable to the attacker. Combined with secure snapshots and WORM, this allows organizations to recover their business from an uninfected copy of the data, making Air Gap a core supported feature of the OceanProtect portfolio.

Huawei's HyperReplication technology is designed to provide robust data redundancy across geographically separated storage systems. According to official technical specifications, Huawei storage supports two primary replication modes:

Synchronous Remote Replication (Option A): In this mode, data is written to both the local and remote storage systems simultaneously. The host receives a write-completion acknowledgement only after the data is successfully stored in both locations. This ensures zero data loss (RPO = 0) but is sensitive to network latency and is typically limited to distances within 100km to 300km.

Asynchronous Remote Replication (Option C): Data is first written to the local storage, and the host receives an immediate acknowledgement. The data is then synchronized to the remote site at defined intervals or based on specific triggers. This mode is not limited by distance and has minimal impact on application performance, though it carries a risk of minor data loss (RPO > 0).

Terms like 'Semi-synchronous' or 'Semi-asynchronous' (Options B and D) are not standard replication modes in the Huawei OceanStor architectural framework.