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| Section | Objectives |
|---|---|
| Topic 1: Storage Deployment Scenarios | - Enterprise storage scenarios
|
| Topic 2: Huawei Storage Products and Solutions | - OceanStor product family overview
|
| Topic 3: Storage Fundamentals | - Storage networking basics
|
| Topic 4: Storage Sales and Presales Knowledge | - Solution positioning
|
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NEW QUESTION # 91
Which statements are correct about NVMe over Fabrics (NVMe-oF) (RoCE v2)? (Select all that apply)
Answer: A,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 # 92
OceanStor Pacific supports only three types of protocols: file (NFS/CIFS), object (S3), and HDFS?
Answer: A
Explanation:
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.
NEW QUESTION # 93
Which CPU model does OceanStor 5300 F V5 use, Intel or ARM?
Answer: B
NEW QUESTION # 94
Which of the following disks has the lowest latency?
Answer: D
Explanation:
NVMe SSDs have the lowest latency because they use the NVMe protocol and a PCIe interface, which offer much faster data access compared to HDDs and even SAS SSDs.
NEW QUESTION # 95
Which container plug-ins are supported by the new-gen OceanStor hybrid flash storage? (Select all that apply)
Answer: A,B
Explanation:
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.
NEW QUESTION # 96
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