Storage Technologies & Data Protection

Distributed Storage

• Advantages include excellent performance, high-performance snapshots, high-performance linked clones, and global load balancing.

NAS File Storage System

• A design company implemented a NAS file storage system with CIFS sharing, achieving: Different access rights for employees, file sharing among project staff, unified management of department business, and designer data backup.

iSCSI Communication Initiators

• In iSCSI, initiators start I/O requests, and can be Initiator Drivers or iSCSI HBA cards.

DeviceManager License Operations

• The License Management interface of DeviceManager supports updating, importing, and activating licenses.

RDMA (Remote Direct Memory Access)

• RDMA features low OS resource usage, high throughput, and low latency.

Huawei Hybrid Flash Storage Data Protection

• Supports remote replication, snapshots, LUN copy, and volume mirroring.

OceanStor Dorado V6 Scale-Out

• Interface modules for Scale-Out connections include 100Gb RDMA and 25Gb RDMA.

Huawei FlashLink Technology

• Technologies include Intelligent Many-Core Technology, cold and hot data separation, smart disk frame, large block sequential write, global wear leveling, and global anti-wear leveling.

Storage Statements

• Correct statements: storage systems have storage hardware, software and solutions and storage types include block, file, and object storage.

Mechanical Hard Disk Interfaces

• SCSI hard disks are more reliable, ATA hard disks overheat during multi-tasking, and SCSI/SAS/FC hard disks meet single-task server needs but ATA hard disks provide poor large data throughput.

Continuous Data Protection

• To create such a set up to ensure users can access data at any point without impacting business, HyperCDP and HyperSnap features can be implemented.

NAS (Network Attached Storage)

• Incorrect statements: NAS does not allow access by multiple clients at the same time; a client can't connect to multiple NAS devices at once.

Snapshot Features

• Snapshot features include instant generation, less storage space usage, and zero backup window.

Huawei Distributed Storage Services

• include block, HDFS, object, and file services, and is supported by Huawei products .

DeviceManager Functions

• Functions include storage resource allocation, equipment performance monitoring, data protection feature management, and alarm management.

Safe Disk Functions

• Include saving data in the cache after power off, backing up business data, and saving system configuration information and logs.

Scale-Out Descriptions

• Scale-Out is a horizontal expansion architecture where system performance improves by adding more control boxes.

Solid State Drives (SSDs) vs. Mechanical Hard Drives

• SSDs have faster read/write speeds and consume less power than traditional mechanical hard drives.

Huawei Data Storage Products Series

• Huawei products include all-flash storage, dedicated backup storage, hybrid flash storage, hyperconvergence, and distributed storage.

Snapshot Technology

• ROW and COW are included in the suite of options, relating to Huawei Snapshot Technology.

Huawei's Dynamic RAID Algorithm

• When a block in the RAID group is damaged, the damaged block data is restored and relocated, and the damaged block is shielded at the same time, and a new RAID group is reconstructed with the remaining blocks. Dynamic RAID algorithm also applies to scenarios with mixed configuration of mechanical hard disks and SSDs. The algorithm can dynamically adjust the number of data blocks in RAID to meet system reliability and capacity requirements and all Flash space can be fully and effectively utilized

SmartThin Application Scenarios

• include businesses where the data growth rate of the application system cannot be accurately assessed, intelligent thin provisioning can be uesd to allocate physical storage space on demand to avoid waste. For businesses with mixed business systems and different storage requirements, intelligent thin configuration can allow different businesses to compete for physical storage space and achieve optimal configuration of physical storage space, and for core businesses with high requirements for business continuity, intelligent thin provisioning can be used to expand the system capacity online without interrupting business.

Dual-Controller Storage

• In AA (Active-Active) mode, two controllers work simultaneously and the options include two modes: AA and HA

Traditional RAID Technology Shortcomings with Data Growth

• Data is load balanced only on some hard disks, large-capacity hard disk reconstruction takes too long, the reconstruction process has a great impact on the business and during the reconstruction process, the data is in a single redundant state, and the risk of data loss is high.

CLI Command Completion

• Spacebar and Tab can be used for command completion.

ITIL Process Management Framework

• The process layer includes change, release, problem, incident, and configuration management.

Huawei Distributed Storage Products

• Include OceanStor Pacific and OceanStor 9000.

System Reliability Indicators

• Common time indicators include Mean Time To Failure (MTTF) and Mean Time Between Failures (MTBF).

DAS Advantages

• include simple deployment and low networking complexity.

OceanStor Dorado All-Flash Storage Service Groups

• Can be realized through front-end interface, global cache, backend interface, and storage pool service grouping.

Huawei Flash Storage System Smart Matrix Architecture

• Correct statements: When a controller fails, services switch to the mirror controller. The storage pool is evenly distributed with RAID 2.0+ granules managing SSD disks, the controller in a single engine can access any hard disk in the engine through the SAS3.0 fully interconnected IO module.

SCSI Architecture

• Essentially a C/S architecture, containing a Target and Launcher.

LUN Snapshot Operations

• The data (that) in the COW copy-before-write space is the data of LUN A at 9:00, the data of the source LUN is the data modified at 10:00, and after the snapshot is rolled back, the data of the source LUN becomes the data of the snapshot LUN modified at 10:00.

Distributed Storage Networking

• Includes the front-end business network, the management network, and the backend storage network.

Huawei RAID2.0+ Concepts

• Concepts involve CK, CKG, Extent, and Grain.

RAID 50

• RAID 50 configurations result in high disk utilization and data read performance compared to RAID5.

Data Processing Basic Steps

• Includes input, output, and processing.

NVMe Descriptions

• NVMe is a standard for PCIe SSDs, it stands for Non-Volatile Memory Standards, and is a standard interface protocol customized for PCIe SSDs. Using native PCIe channels to connect directly to the CPU eliminates external controller latency for SATA/SAS interfaces.

LUN Snapshot Parameters

• Parameters needed when creating a LUN snapshot: whether to activate, a description, a name, and the save location.

Storage Technology Development Characteristics

• Development pursues improved resource utilization, data sharing, security, and extended distance.

Huawei Hybrid Flash Storage Protection Technologies

• Support hard disk bad sector repair, coffer disk, power-off data protection, and data pre-copy.

Snapshot Characteristics

• Features quick recovery, backup and archive capabilities, and instant generation.

Storage Cloning Features (Huawei OceanStor)

• After creating a HyperClone, the target LUN data has an initial synchronization process. Multiple HyperClone Pairs can be managed in a unified manner, providing copy functions in a group manner to ensure that the data copies of all objects in the group are at the same time. After HyperClone is created, the data of the target LUN needs to wait for the initial synchronization to complete before it can be mapped to the host for reading and writing.

SmartThin technology

• Virtualizes storage resources, doesn't pre-allocate all space, SmartThin does not pre-allocate all space, but presents the capacity to the customer in a form that is larger than the physical storage space and SmartThin is implemented by allocating on demand

Huawei RAID2.0+ Extent

• The extent sizes of different storage pools can be different, the minimum unit of space requested by a thick LUN in a storage pool, extent belongs to a Volume or a LUN and extent size can be set when creating a storage pool.

Asynchronous Remote Replication Synchronization Types

• Synchronization types are manual and automatic.

DeviceManager "HSSD log" Information

• Collecting the "HSSD log" provides fault information, hard disk operation log, SMART and other log information, and I/O statistics and lifespan.

NAS Storage Network Protocols

• Protocols commonly used include NFS, FTP, NDMP, and CIFS.

Overview of distributed and NAS file storage systems. Covers iSCSI initiators, DeviceManager license ops, RDMA, Huawei hybrid flash data protection with OceanStor Dorado V6 scale-out.