Practice Free H19-308_V4.0-ENU Exam Online Questions
Question #31
By deploying an object storage gateway based on the existing SAN or NAS storage, the S3 object storage service can be quickly provided. This is the mainstream delivery mode in the future.
- A . TRUE
- B . FALSE
Correct Answer: B
B
Explanation:
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.
B
Explanation:
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.
Question #32
A bucket can be created in an object storage bucket.
- A . TRUE
- B . FALSE
Correct Answer: A
Question #33
Which network protocols are supported by SAN storage? (Select all that apply)
- A . Fibre Channel
- B . InfiniBand
- C . iSCSI
- D . NFS
Correct Answer: A, B, C
A, B, C
Explanation:
A Storage Area Network (SAN) is a dedicated network for block-level data access. Huawei OceanStor systems support a variety of block-access protocols to ensure compatibility with different infrastructure environments. Fibre Channel (FC) is the industry standard for high-performance enterprise SANs, offering dedicated, low-latency, and lossless delivery. iSCSI provides block-level storage over standard TCP/IP Ethernet networks, making it a flexible and cost-effective alternative for many organizations.
InfiniBand (Option B) is a high-bandwidth, low-latency interconnect protocol often used in High-Performance Computing (HPC) and specialized SAN clusters to connect compute nodes to storage pools at extremely high speeds. NFS (Option D) is excluded from this answer because it is a NAS (Network Attached Storage) protocol. NFS (Network File System) provides file-level access rather than block-level access. While modern Huawei systems like the OceanStor Dorado series are "Unified Storage" (supporting both SAN and NAS on the same hardware), technically, only A, B, and C are considered SAN protocols.
A, B, C
Explanation:
A Storage Area Network (SAN) is a dedicated network for block-level data access. Huawei OceanStor systems support a variety of block-access protocols to ensure compatibility with different infrastructure environments. Fibre Channel (FC) is the industry standard for high-performance enterprise SANs, offering dedicated, low-latency, and lossless delivery. iSCSI provides block-level storage over standard TCP/IP Ethernet networks, making it a flexible and cost-effective alternative for many organizations.
InfiniBand (Option B) is a high-bandwidth, low-latency interconnect protocol often used in High-Performance Computing (HPC) and specialized SAN clusters to connect compute nodes to storage pools at extremely high speeds. NFS (Option D) is excluded from this answer because it is a NAS (Network Attached Storage) protocol. NFS (Network File System) provides file-level access rather than block-level access. While modern Huawei systems like the OceanStor Dorado series are "Unified Storage" (supporting both SAN and NAS on the same hardware), technically, only A, B, and C are considered SAN protocols.
Question #34
Which statements are incorrect about remote replication and HyperMetro features of storage systems? (Select all that apply)
- A . Asynchronous remote replication has no limit on the distance.
- B . HyperMetro and synchronous remote replication technologies can implement automatic
switchover upon a storage system fault. - C . Synchronous remote replication and HyperMetro technologies require that the distance does not exceed 300 km.
- D . Both LUNs in a remote replication pair can provide services for servers.
Correct Answer: B, D
B, D
Explanation:
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.
B, D
Explanation:
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.
Question #35
Which of the following backup types is recommended for important applications with a small amount of data, such as databases?
- A . Incremental backup
- B . Full backup
- C . Differential backup
Correct Answer: B