Free H19-308 sample questions

Correct answers: OceanStor Pacific supports unified storage, allowing simultaneous access via SMB, NFS, and S3 protocols to the same data namespace.; OceanStor Pacific's architecture allows for independent scaling of capacity and performance by adding different types of nodes.; The HDFS protocol is also natively supported, making it suitable for future big data analytics on the media assets.

OceanStor Pacific is a unified scale-out storage system that provides multi-protocol access (SMB, NFS, S3, HDFS) to a single namespace, eliminating data silos. Its architecture allows for linear, independent scaling of performance and capacity by adding nodes. Native HDFS support is a key feature for big data and AI workloads.

Correct answer: True

This statement is true. A fundamental architectural principle of object storage is that objects are immutable. Unlike a block in a LUN or a file on a file system, you cannot perform partial writes or in-place edits to an existing object. Any change requires creating and uploading a new version of the entire object. This design simplifies data management and ensures data consistency.

Correct answer: Create 1 primary copy on OceanStor Dorado, a 2nd copy on an OceanProtect appliance in the same data center, and a 3rd copy replicated to a public cloud S3 bucket.

The 3-2-1 rule requires at least three copies of data, on two different types of media, with one copy located off-site. This option perfectly fulfills the rule: 1) The production data on Dorado is the first copy. 2) The backup on the local OceanProtect is the second copy. 3) The replicated copy in a public cloud is the third copy. The media are different (primary flash storage, backup disk appliance, cloud object storage). The cloud copy is off-site.

Correct answer: Registered State Change Notification (RSCN)

Registered State Change Notification (RSCN) is the specific FC service designed to inform all relevant nodes in a fabric about events like a port coming online/offline. While necessary for fabric operation, excessive RSCNs in large or poorly configured fabrics can cause broadcast-like storms, leading to CPU spikes on switches and end-devices, resulting in the high latency described. The host reboot triggers a FLOGI, which in turn generates an RSCN that is propagated throughout the fabric.

Correct answer: Performance nodes with NVMe SSDs

For workloads with intensive metadata operations (many small files, lookups, creations, deletions), performance nodes equipped with low-latency NVMe SSDs are the optimal choice. These nodes are specifically designed to accelerate metadata and small file I/O, which is the primary bottleneck in genomics and many HPC applications. High-density capacity nodes are better suited for storing the large sequencing files once the metadata is handled.

Correct answer: Data is rebuilt to free space across all disks in the storage pool, significantly reducing rebuild time.

A core advantage of RAID 2.0+ is its virtualization layer. Instead of rebuilding data from surviving disks onto a single hot spare (a major performance bottleneck in traditional RAID), RAID 2.0+ reconstructs the data into free 'chunks' distributed across all available disks in the storage pool. This parallelizes the rebuild process, dramatically shortening the rebuild time and reducing the risk of a second disk failure during the vulnerable rebuild window.

Correct answer: HyperSnap

HyperSnap is Huawei's snapshot technology. It is designed to create instantaneous, space-efficient, point-in-time copies of data volumes. It uses a redirect-on-write (ROW) mechanism, which means snapshots consume storage space only when the original data is modified. This perfectly matches the requirement for frequent, instant, and space-efficient copies for rollback purposes.

Correct answer: Veeam Ready Repository with DataTurbo (Source-side deduplication)

While OceanProtect can present storage as NFS or SMB shares, the most optimized integration with Veeam is through its certified Veeam Ready Repository interface. This integration allows for advanced features like Huawei's DataTurbo, which performs source-side deduplication on the Veeam proxy before sending data to the OceanProtect appliance. This significantly reduces network traffic, shortens the backup window, and maximizes overall performance.

Correct answer: OceanStor Dorado All-Flash Storage with NAS feature enabled

OceanStor Dorado, with its end-to-end NVMe architecture and FlashLink algorithm, is designed for extremely low latency. When its NAS feature is enabled, it provides exceptionally high-performance file services. This makes it the ideal choice for demanding workloads like EDA, which are sensitive to metadata latency and require high IOPS for file operations.

Correct answer: Erasure coding

Erasure coding is the ideal data protection method for large-scale, archival object storage. It breaks data into fragments, expands and encodes them with redundant data pieces, and stores them across different locations or nodes. It provides very high durability while being much more space-efficient than traditional replication (e.g., an 8+4 erasure coding scheme has an overhead of 50%, whereas 3-copy replication has an overhead of 200%).