H19-308_V4.0 Exam Dumps - HCSA-Presales-Storage V4.0

Unlike traditional file storage which uses a hierarchical tree structure, Huawei Object Storage utilizes a flat structure where each " object " is a self-contained unit of data. According to the documentation, an object consists of four fundamental components:

Data (Option D): The actual content of the file (e.g., a photo, video, or document).

System Metadata (Option C): These are fixed attributes managed by the storage system, such as file size, creation date, last modified time, and HTTP content type.

Customized Metadata (Option B): A unique advantage of object storage is the ability to attach user-defined tags or labels to an object (e.g., " Patient_ID: 12345 " or " Department: Radiology " ). This allows for advanced data indexing and searching without opening the file itself.

Object Identifier (OID) (Option A): This is the unique key or " Address " used to retrieve the object. In a flat namespace, the OID ensures that every piece of data can be located instantly without traversing a complex directory path.

The OceanStor Pacific series is Huawei’s distributed scale-out storage product line, and its models are grouped by workload positioning, such as performance, balanced, and archive scenarios. Performance models are designed for high-throughput and high-IOPS workloads. Balanced models are used for mixed capacity and performance requirements. Archive models are optimized for cost-effective large-capacity retention of unstructured data. The hybrid storage models listed as 5310, 5320, 5510, and 5610 belong to Huawei OceanStor hybrid flash storage, not the OceanStor Pacific distributed storage series. Those models are controller-based hybrid flash arrays used for enterprise SAN and NAS services, while OceanStor Pacific uses a scale-out distributed architecture. Therefore, the non-Pacific product model category is the hybrid storage model group.

Object storage is designed for flexible access by applications, users, and third-party tools. Users can manage object storage resources through third-party clients, especially when the system supports S3-compatible interfaces. Backup and archiving software can also interconnect with object storage, making it suitable for long-term retention, data protection, and cloud-style backup repositories. REST APIs over HTTP/HTTPS are one of the most important object storage access methods because they allow applications to create buckets, upload objects, download objects, and manage metadata through standard web protocols. SDKs provide packaged API functions for developers, reducing coding complexity when integrating object storage into applications. Since object storage is built around open, API-driven access, all listed usage methods are common and valid.

According to Huawei’s BCManager and HyperReplication guides, " incorrect " statements must be identified to understand the distinction between disaster recovery (DR) and active-active solutions. Option B is incorrect because while HyperMetro supports automatic transparent failover (zero RTO) using a Quorum Server, standard synchronous remote replication typically requires manual intervention or third-party management software to trigger a switchover when the primary site fails. In synchronous replication, the secondary LUN is usually in a read-only state and cannot take over automatically without administrative action.

Option D is incorrect because it describes an " Active-Active " state. In a standard Remote Replication pair, only the primary LUN is accessible for host I/O (Read/Write), while the secondary LUN is locked to maintain data consistency. Only the HyperMetro feature allows both LUNs in the pair to provide simultaneous read and write services to application servers across different sites. Regarding distance, while asynchronous replication is physically less constrained, synchronous and HyperMetro technologies are strictly limited by latency (typically requiring round-trip time < 10ms and distance within 100km to 300km depending on the specific product line) to avoid severe application performance degradation.

Direct-Attached Storage (DAS) is a traditional storage architecture where storage devices are connected directly to a host server. Huawei documentation defines the following key characteristics:

Direct Connection (Option C): DAS connects to the server via internal or external interfaces such as SATA, SAS, or SCSI, rather than through a storage network.

No Network Devices (Option A): Because it is a 1-to-1 connection, it does not require Fibre Channel switches or Ethernet switches to facilitate the link between the host and the storage. This makes it simple and cost-effective for small-scale deployments.

Block Storage Services (Option B): Like a SAN, DAS provides block-level access. The server’s operating system manages the file system (NTFS, EXT4, etc.) directly on the provided blocks.

While a server attached to DAS can share its files over a network (becoming a file server), the DAS itself is not a " File Storage Service " (Option D). In Huawei’s hierarchy, file services are the domain of NAS (Network Attached Storage) , which provides shared access to files via protocols like CIFS/SMB or NFS.

OceanStor Pacific is designed for large-scale distributed storage and supports several industry-leading capabilities. Flexible multi-site protection, multi-copy redundancy, and erasure coding help customers balance availability, data durability, and storage efficiency across large deployments. Native lossless multi-protocol interworking is important because the same data can be accessed through multiple protocols without unnecessary data copies or semantic loss, improving operational flexibility. Stable performance with hundreds of billions of objects per bucket reflects the platform’s distributed metadata and scale-out design, which is critical for massive object storage environments. Delivering both high bandwidth and high IOPS on one device is also a major advantage because it allows OceanStor Pacific to support mixed workloads such as video, AI, big data, file, and object services. Therefore, all options are correct.

In Huawei’s object storage management (OceanStor Pacific), quotas are a critical administrative tool for resource governance. Option C is correct as quotas serve as a fundamental method for controlling how much of the physical resource pool a specific entity (tenant or user) can access and consume.

Option A and D are correct because Huawei supports both Tenant-level and Bucket-level quotas. Once a Hard Quota limit is reached for a tenant or a specific bucket, the storage system will reject further write requests (PUT operations) to prevent exceeding the allocated budget. Option B is correct because the storage management system (DeviceManager or eSight) integrates with the quota system to trigger alarms when usage reaches predefined thresholds (such as 80% or 90%) or when the resource limit is reached, allowing administrators to take proactive measures like expanding the quota or cleaning up data.

While it is technically possible to use a gateway to provide object interfaces over traditional storage, Huawei documentation explicitly states that this is not the mainstream delivery mode for the future of cloud-native data. Traditional SAN or NAS architectures are built on hierarchical file systems or block volumes, which face significant metadata performance bottlenecks and scalability limits when forced to handle billions of objects.

The " mainstream " and recommended approach by Huawei is Native Object Storage , such as that found in the OceanStor Pacific series. Native object storage is built on a flat architecture from the ground up, allowing for massive horizontal scalability, a global namespace, and superior metadata handling through distributed indexing. Using a gateway is considered a legacy transition method or a " bridge " solution, but it lacks the efficiency, performance, and durability required for modern big data, AI, and cloud-native applications that natively use the S3 protocol.