Storage Concepts

Huawei Smart Matrix Architecture

• Uses front-end and back-end interconnection.
• Controller failure does not disrupt normal business operations.

Huawei RAID 2.0+ Hot Spare Strategy

• The hot spare strategy determines the capacity of hot spare space reserved by the system.
• When the total number of hard disks is 12, the capacity equivalent to 1 hard disk is reserved.
• When the total number of hard disks is 10, the capacity equivalent to 1 hard disk is reserved.

Snapshot Rollback in Storage

• Snapshot rollback may lead to data loss.
• Snapshot rollback can quickly restore data.
• During rollback, if there is a write to the source LUN, complete the write operation first, then perform the rollback.

Flash Memory Technology

• QLC is cheaper than TLC but does not support frequent rewriting.
• SCM offers high-speed read/write rates, suitable for server memory.

Fiber Optic Switches

• A port can be in multiple zones.
• A switch can have multiple zones.

SAS Protocol Characteristics

• Supports multiple container terminals to form a bundled version.

Mechanical Disk Components

• Read/write head is responsible for reading and writing data.

File Sharing Protocols and Methods

• CIFS protocol is utilized for file sharing.
• Homedir sharing method is employed to offer users space for folder access and writing.

Storage Architecture Trends

• Storage architecture is evolving from distributed to centralized.

Data Storage Technologies

• Smart Tier and Smart Cache are used to manage archived and online business data when SSD drives are expensive and NL-SAS drives are insufficient for performance needs.

Data Recovery with RAID

• RAID 5, RAID 6 and RAID 3 arrays can recover data when data is damaged.

System Continuity and RPO/RTO Values

• Systems with high business continuity should aim for lower RPO and RTO values.

CKG Composition

• CKG is composed of multiple CKs on different hard disk types within the hard disk domain.

Snapshot Types

• A snapshot copy is considered a snapshot of an original snapshot, and it contains data written to the original snapshot.

Hard Disk Selection for Storage Systems

• SSDs AS are used for high I/O, high performance tiers in new storage systems.

FRU and CRU Definitions

• FRU stands for Field Replaceable Unit.
• CRU stands for Customer Removable Unit.

Huawei Ocenstor Expansion

• Huawei Ocenstor can only be expanded through PCI and Scale-out.

Huawei OceanStor V3 Smart Cache

• Improves read performance but not write performance.

Scenarios Using SCSI Protocol

• Expanding storage capacity by adding SAS hard disks.
• Configuring ISCSI storage for a newly added host.

LAN-Free Backup Characteristics

• Backup performance is usually higher than that of LAN-Based.

Remote Replication LUN Size

• Primary and secondary LUNs must be the same size in remote replication.

Data Read/Write Limitation

• Only one head is allowed to read and write data at a time, regardless of the number of disks.

FC Switch Communication

• Which ports in the FC switch can communicate with each other is determined by the zone.

NAS vs SAN Deployment

• NAS is easier to deploy than SAN.

RAID2.0+ Technology

• Divides physical hard disks into data blocks (chunks, CKs) where CKs on different disks form a Chunk Group (CKG) with a RAID relationship.

Traditional RAID configurations

• RAID 1 uses mirroring.

Data Backup Methods

• Clone can be used for a complete data backup relative to the current business for salesperson inquiry and data mining

Synchronization Cycle Time Limit

• Asynchronous remote replication has a synchronization cycle time limit of 3s to 300min.

Banking System Reliability

• For core transaction business systems, entry-level business systems are generally used to ensure business reliability.

NVMe Characteristics

• NVMe can realize direct communication between the device and the CPU.
• Supports the installation of drivers under NVMe devices and can also be used normally.

FC SAN Networking

• FC switch is connected using arbitration ring, double exchange, single exchange or direct connection.

NAND Flash Media

• Original data must be erased before new data is written.
• When erasing/writing limit is reached, the cell cannot continue to read or write data

Thick LUN Space Allocation in Huawei OceanStor V3

• Thick LUN applies for space in chunks from the storage system.

Backup System Composition

• Backup media, backup server and Backup software is included.

Storage System Cabling

• Mini SAS HD cables are divided into mini SAS HD cables and mini SAS HD optical cables.
• The mini SAS HD cable is used to connect the PCle interface of the controller to the data switch.
• One end of the fiber can be connected to the FC HBA card, and the other end to the fiber switch/storage.
• The serial port cable is used to connect the expansion port and the controller subrack to the hard disk subrack.

Protocols Supported by DAS

• SATA
• SAS Protocol
• FC Agreement
• SCSI protocol

Huawei OceanStor Full-Flash Storage System

• Supports SSD hard disks and NVMe hard disks.

Flash Memory Particles

• SLC stores 1 bit of data.
• MLC stores 2 bits of data.
• QLC stores 3 bits of data.

OceanStor V3 LUN Deduplication

• The deduplication function is not used together with Smart Cache to accelerate performance.
• Deduped LUNs are selected when created and cannot be restored to a state without deduplication.
• You cannot create the LUN in heterogeneous array LUNs taken over support block-level deduplication
• Deduplication and remote replication cannot coexist on the same LUN.

Data Processing Steps

• Calculating a sales summary.
• Salary calculations and printing employee receipts.

Synchronous Remote Replication

• Management module RM is software.

cMLC Solid State Disks

• Suitable for home storage of MP3 files and JPGs due to their low cost and large capacity.

Smartkit Device Management

• It can manage third-party devices.

HyperMeteor Requirements

• An arbitration server must be configured and D. An arbitration server must be configured

DAS and SAN

• DAS and SAN are both external storage, so storage resource sharing can be easily realized

Huawei Scale-Out Storage Products

• Support object, file, block, and HDFS services.

Huawei OceanStor Storage Device

• The coffer disk is an optional configuration because the write cache has a mirror image and there is backup power supply to power the controller

Huawei Al-Flash Series Storage Systems

• FlashLink technology is used in Huawei al-flash series storage systems.
• Large-block sequential write, global wear leveling, hot and cold data separation and intelligent multi-core technology are technologies of FlashLink

Storage Disaster Recovery Technlogy

• It is mature, with a wide range of options.

Huawei FusionCube Structure

• Huawei FusionCube is an IT infrastructure platform based on hyperconvergence architecture

Oceanstor Dual Controller Flash Storage Products

• Products must ensure that the LUN working controller and the attribution device are consistent in control

LAN Base Networking

• Both business and data flow go through the LAN, occupying a large bandwidth

Backup Systems

• In the backup system, the backup data center needs to pass through the media server before it can be transferred to the storage system.

Backup Recommendation

• Cumulative incremental backup is recommended to back up in a short time and save storage space to the utmost extent if some data has sufficient client server resources

DAS Characteristics

• The number of ports that can be connected to the host is limited

iSCSI Protocol

• It is responsible for generating iSCSI protocol data unit
• The SCSI layer is responsible for generating the command descriptor block
• Transmission based on TCP/IP protocol

Checking Hot Data And Smart Tier

• Smart tier migrates data from the capacity tier to the high performance tier

Disk Redirection

• Allocation of storage space when writing is Capacity-on-write, and the redirection of reading and writing is Direct-on-time

Government Disaster Recovery Solution

• The time period for data synchronization between the production center and the disaster recovery center should be selected at night when the business volume is small

Advantages of Object Storage

• Object Interface/Flexible Data Segmentation/Improved Data Intregrity and Security

RAID 5 Composed Of Three Disks

• 01100101 will be written to a parity disk.

Smarttier Implementation

• The storage system goes through I/O monitoring, data layout analysis, and data migration to realize SmartTier

WWNN and WWPN Numbers

• A device has only one WWNN number, but it can have multiple WWPN numbers

Huawei Ocean Stor All Flash Storage Devices

• All Huawei Ocean Stor all-flash storage devices can create thick LUNs

External Storage Connection

• JBOD doesn't provide security

The Process Of Regenerating Data

• Regenerating data is called recovery

HyperClone

• Full synchronisation and different synchronisation are supported

New Storage Systems With IO's

• New storage systems with IO's use SSDs because it has high characteristics for the company's main business

Sector Sizes On Disk

• A sector defaults to 512 bytes

OceanStor LUN Copy Features

• LUN copy can only be copied offline

Storage Statements

• Storage types include block storage, file storage, and object storage

The QoS of a file system

• The QoS of the file system supports IO priority configuration and also supports policy configuration

LUN Composition

• Extents define the storage pool

SCSI Bus

• The SCSI bus assigns a unique ID to each device, and can support up to 8 devices.

Creates A Thin LUN

• Displays the scanned disks at 10G

Huawei's RAID 2.0+ Technology Difference

• Thin LUN will overall make the maximum utilization of storage space

NAS Equipment

• Optimizes file service, storage, retrieval, file access, and other functions on the basis of general purpose servers

The Hyper Clone Function

• If there are multiple applications that need to data, can be multiple target LUNs
• If the hard disk LUN has physical clone, the service can continue by provided through the split target LUN
• In the event of logical failure of the source LUN, data can be reversely synchronized through the target LUN

Incorrect statement about DAS

• Management is scattered and cannot be centralized

Disater Recovery

• Is concerned with business continuity

Establishing Infrastructure

• Establish according to the Internet data center

Backup Statements

• the historical data at the time of the backup can be recovered, not the data at the time of the failure

Device Backup Badwith

• Backup Cycle
• The size of the initial data
• Daily Quantity Increase

Huawei Data Storage

• All flash storage
• Scale out storage
• Hyper converged storage
• Hybrid Flash Storage

Backup Network Modes that have little impact on host performance

• LAN free and Server Free

Types of storage devices you need to consider

• Nearline storage
• Offline Storage
• Online Storage

Hardware Node Example

• The essence of IP flapping is to switch the part current carying the service

The following are the correct descriptions of the Hyper Clone feature

• Active-active as a negative LUN can be used as a source LUN of a Hyper clone as a target LUN

SmartThin Technology To Optimize Storage

• The implementation of Smart Thin is to allocate on demand

Using The Sas Interface

• In addition to SAS hard drives, what types of hard drives can the storage support? (Multiple Choice) A. SSD hard disk

Statements About Cloudy Computing

• A deployment model of cloud computing is to divide a large physical server into multiple small virtual machines.
• A deployment model of cloud computing is to aggregate multiple small physical servers into one large host.

Unstructured Data

• Images and music belongs to unstructured data

Thick and Thin LUN's

• After data on a thin LUN is deleted, the space is reclaimed to the storage pool
• An extent is the minimum granularity to allocate storage space in a thick LUN

Cifs Share Permission

• Cifs share permissions from large to small are as follows: 1. "Prohibit", 2 "Read and Write" 3 "Full Control" 4 "Read Only", the answer is [C], the answer code is [3->4->2->1] , which means full controll 3 ,, read only 4 , read and write 2. Prohibit 1

Cifs Protocol

• Is used in the workflow for file sharing

Hard Disk Domain

• Supports adding hard disks but storage

Coffer Disk

• The BBU provides power for the cache and the coffer disk

Database Services with high IO's

• You purchase or server and deploy database systems

Huawei Distributed Storage

• Object Storage is a solution

NAS Storage

• The NAS engine and storage unit are interconnected by an Ethernet unit

SSD Composition

• Flash particles

SAS Link Layer

• How can I turn into transmitted, and has and data are encapsulated in SAS frames

Methods Of Raid

• Implementation methods of RAID/ Software RAID and Hardware RAID

correct description of the FTP file transfer protocol?

• Transmission based on TCP

Raid Strategy

• Best for high performance and reliability
• Raid 10

benefits and necessity of building a disasi tepovary

• reduce the level of disaster preparedness in areas where there are fewer natural

raid 10? (Multiple

• 10 uses data protection
• disks mirror
• code

External storage

• according to the connection method? A)
• SAN C)

Built in storage?

-The built-in storage system is that the computer does not have it connected to it

das storage network Must be used?

• False

Test your knowledge of Network Attached Storage (NAS), RAID array data regeneration, synchronization features, tiered storage, disk sector sizes, LUN copy/cloning, and Quality of Service (QoS) in file systems. This quiz covers key storage technologies and concepts.