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NEW QUESTION # 89
Which statements are correct about NVMe over Fabrics (NVMe-oF) (RoCE v2)? (Select all that apply)
Answer: C,D
Explanation:
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 correct because 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.
NEW QUESTION # 90
Chip EDA systems mainly process massive small files (capacity < 1 PB) and has high requirements on OPS. Which of the following products is suitable for the EDA scenario?
Answer: B
Explanation:
EDA workloads involve intensive processing of massive quantities of small files with very high OPS requirements. OceanStor Dorado NAS, built on all-flash architecture with ultra-low latency and high metadata performance, is optimized for small-file operations and provides the sustained OPS needed for chip design workflows.
NEW QUESTION # 91
What protocols does the DAS interface support?
Answer: B,C,D
Explanation:
DAS directly connects storage devices to servers without using a shared storage network. Therefore, DAS commonly uses direct-attached interface technologies such as SAS, Fibre Channel, and InfiniBand, depending on the server and storage hardware design. SAS is widely used for direct disk or enclosure attachment. Fibre Channel can also be used in direct-attached configurations where a server connects directly to storage ports without an FC switching fabric. InfiniBand is a high-speed interconnect that can be used in specialized direct storage environments requiring high bandwidth and low latency. iSCSI is not normally classified as a DAS interface because it encapsulates SCSI commands over TCP/IP and is used for IP SAN connectivity through Ethernet networks. Therefore, the supported DAS interface protocols are SAS, Fibre Channel, and InfiniBand.
NEW QUESTION # 92
Compared with the previous generation, which of the following are the reliability improvements of high-end models of the new-gen OceanStor hybrid flash storage? (Choose all that apply.)
Answer: A,B,C
Explanation:
The new-generation high-end OceanStor hybrid flash models improve reliability by enabling active-active SAN deployment, supporting high-density snapshots for enhanced data protection, and using SmartMatrix 3.0 to tolerate failures of up to seven out of eight controllers.
NEW QUESTION # 93
Which of the following are differences between scale-out storage and array storage? (Choose all that apply.)
Answer: A,B,D
Explanation:
Scale-out storage focuses on massive capacity, high bandwidth, and elastic expansion. It delivers TB-level throughput, supports 10 PB-level data capacity, and scales to thousands of nodes, which distinguishes it from traditional array storage that emphasizes high IOPS rather than extreme bandwidth and scale.
NEW QUESTION # 94
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