Storage Technologies and Concepts

• Initial configuration of a data center system requires:

  • Configuring the IP address of the management network port
  • Logging in to Device Manager
  • Configuring an accessible IP address
  • Changing the password

• In Huawei OceanStor V3, regarding cloning:

  • After synchronization, data written to the host is written to both the master and slave LUNs simultaneously
  • After splitting and resynchronizing, incremental synchronization is performed

• RAID 2.0+ characteristics:

  • Extent sizes can vary between storage pools, but are consistent within the same pool

• RAID 6 requires at least 4 hard drives

• In RAID 2.0+, the extent is the basic unit for the technology in the storage pool

• Host multipath software installation enables the OS to access the same LUN via multiple links, improving link reliability and preventing single link failure

• Remote replication necessitates primary and secondary storage from the same manufacturer

• Advantages of RAID 2.0 compared to traditional RAID:

  • Business load balancing
  • Rapid refactoring
  • Full participation in reconstruction

• Huawei's OceanStor100D supports:

  • Private cloud
  • Distributed database
  • Virtualization
  • Big data analysis

• Distributed storage uses cloud system storage and provides object storage; NAS equipment must be purchased for file storage

• Huawei's full-flash storage uses Smart Matrix architecture for front-end and back-end interconnection; any controller failure does not affect business operations

• Parameters measuring mechanical hard drive performance:

  • Hard disk speed
  • Data transfer rate
  • Average visit time

• Clone is used to realize the conversion between Thick LUN and Thin LUN

• In enterprise data backup, if the data stream goes through an independent network instead of the production server, it uses a Server-Free backup network

• In Huawei OceanStor V3 based on RAID 2.0+, the system does not automatically create a LUN and file system when a user creates a file system

• An enterprise using cloud primary and backup data-level disaster recovery can divide storage into protected and unprotected LUNs, creating disaster recovery VMs on protected LUNs and configuring array replication for protection LUNs

• The zone determines which ports in the FC switch can communicate with each other

• RAID 5 characteristics:

  • Uses XOR algorithm to check.
  • Uses striping to write data.

• Asynchronous remote replication technology steps:

  • New time slice is generated in the cache of the primary LUN and the secondary LUN when each replication cycle starts -Data written by the host is cached in the time slice of the main LUN Cache, and the response host is completed
  • Copy the data of time slice T1 directly to the slave LUN, and write it into the time slice of the slave LUN

• RDMA technology applications:

  • Server and storage interconnection through InfiniBand
  • Data center server interconnection through InfiniBand or ROCE -LAN-Based backup method characteristics: -Backup agent will affect the performance of the application server -The backup data is based on LAN, which affects network performance -The backup business needs to be maintained separately, which increases the difficulty of management and maintenance

• Smart Tier technology places SSDs in the high-performance layer because of their short read and write times and high performance

• Built-in storage system connects directly to the host bus and includes:

  • High-speed cache and memory for CPU operations.
  • Hard disks and optical drives connected to the computer motherboard

• InfiniBand characteristics:

  • Based on standard protocols
  • High Banwidth , low latency
  • Remote Direct Memory Access function
  • Transport Offload

• In Huawei OceanStor storage, the coffer disk is not an optional configuration because the write cache has a mirror image and backup power

Hardware Node example

• Distributed storage model can be chosen based on the description such as

• Performance node for Virtualization and could computing scenarios

  • OceanStor 100D P100, P110

• Capacity node for Big data analysis and Object Resource Pool Scenario

  • OceanStor 100D C100, C110

• All-flash node for Database scenario

  • Oceanstor100D F100, F110

• CLI command "change user user_name=new user level=admin":

  • The operation performed is change
  • The modified user level is admin

• Storage product forms include:

  • Integrated disk control
  • Disk control separation
  • Entire cabinet

• Subsystems of a storage device are:

  • Storage management software subsystem
  • Hardware subsystem
  • Connect the Subsystem
  • Control subsystem

• Possible reasons for a broken mechanical hard disk after IT storage equipment relocation:

  • Broken head
  • Head displacement scratches the disc

HyperMetro Configuration Process

• Configuration preparation
• Configure the switch
• Checking the license file
• Configuring the quorum server software
• Adding a remote device
• Configuring Active - Active
• Creating an arbiter server
• Create an active-active domain
• Configure a host's multipathing policy
• Create an active-active consitency group
• Hardware and Software RAID are the implementation methods of RAID
• Correct Understandings of the structure all flash storage software are:
  • Able to realize the management function of the storage system through the management function control software
  • Able to realize basic data storage and reading and writing functions through basic function controt software
  • Able to support hot and cold data, intelligently able to classify data into different storage tiers
  • Able to realize various advanced functions such as backup, disaster recovery and performance tuning through value-added function control software
• New ear of ICT and technology includes
  • Cloud computing which is an increase, use and delivery model of Internet-based related services, usually involving the provision of dynamic, easy-scalable and often virtualized resources through the Internet
  • Social media is a virtual community and network platform that people use to create, share, and exchange opinions, opinions and experiences
  • CPS (Cyber Phsical System) includes system engineering such as ubiquitous environment perception, embedded computing, network communication and network control in the future. It is a physical system with functions of computing, communication, precise control, remote collaboration and autonomy
  • The new ICT era: ICT systems migrate from support systems to production systems

This lesson covers key concepts in storage technologies. It includes topics like SCSI connections, RAID levels (especially RAID 2.0+), Huawei OceanStor features, and parameters influencing hard drive performance. Technologies like Thin and Thick LUN conversion and data center initial configuration are also explained.