Huawei Storage System & Data Protection

• The Huawei hybrid flash storage system uses RAID2.0+ virtualization, BBU module, mirror memory, and hard disk pre-copy tech to protect data after a controller failure.

LUN Components

• LUN includes data volume and metadata volume

RAID3

• RAID3 has a dedicated parity disk
• RAID3 uses 5 hard disks with a utilization rate of 60%

Snapshot Activation

• It's possible to activate selected snapshots in batches
• The system defaults to immediate activation of snapshots

Storage Management Content

• Storage management includes equipment performance monitoring, user management, data protection feature management, alarm management, and storage resource configuration functions

SCSI Card Functions (DAS Architecture)

• SCSI card functions include conversion between server internal IO and SCSI protocol messages
• Implements physical connection between server and storage IO
• Backs up data regularly

PCI Express Advantages (vs. PCI)

• PCI Express advantages include compatibility with PCI, backward compatibility with PCI software
• Include error handling and error reporting capabilities
• Dual channels, high bandwidth, fast transmission rate
• Supports hot plug

Troubleshooting Methods

• Troubleshooting freezes can include checking client status and resource shortage
• Check for a RAID group degradation alarm
• Check the storage device fault warning indicator

Storage Expansion

• Scale-Out technology can increase storage performance and capacity
• Scale-Up technology requires adding storage devices to increase storage capacity
• Scale-Out device nodes can be in the same domain city

NAS Device Components

• NAS device components include Protocols NFS and CIFS
• Disk resources using industry-standard storage protocols
• One or more network interface cards
• NAS Engine

Midrange Storage Architecture Evolution

• Evolution proceeds from dual-controller to AA architecture

• Interface hardware is generally modular

• Includes NAS and SAN multi-protocol support

• iSCSI nodes do not transmit SCSI instructions directly on the TCP/IP network, rather they are encapsulated

• All-flash storage, such as Huawei OceanStor, utilizes smartMatrix architecture, and any single controller failure will not affect normal business operation

• Huawei's active architecture for mass storage balances load in high-concurrency transactions by evenly distributing I/O to front-ends to facilitate access load balancing

• In Huawei SSDs, the basic operation unit of erasing is not Page, but rather, Block

• DAS storage network architecture is unnecessary to build using additional switches and routers

• Each OceanStor Dorado V6 4U controller box has two redundant PSU modules (PSU0 and PSU1 forming a power plane)

• IP protection drift does not support drift between diff types of interface modules

• SmartTier automatically and dynamically aligns hot data with faster storage media and cold data with slower media

• Huawei distributed storage block service asynchronous remote replication builds relationships based on the block service cluster, periodically synchronizing data of master and slave volumes based on differential data

• Hyperconvergence unifies computing capacity, file storage, memory, and networking, managing them as a common entity

• RAID 3 cannot improve performance when writing small amounts of data, because of parity calculations

• Huawei's high-end storage product OceanStor Dorado 18800 V6 adopts a multi-controller hardware architecture

• With Huawei hybrid flash devices on a virtualized platform, uninstalling the multipath software can sometimes prevent service interruptions and delays

• SCM(storage class memory) access speed is faster than NAND type memory and slower than DRAM

• A company implements continuous data protection for the FS of imp applications. When it's necessary to roll back a fs, the application shared mount of the source fs must be canceled

• Huawei OceanicStor hybrid flash series integrates SAN and NAS resources

• In Huawei RAID 2.0+, a Disk Group is an internal system object

• CIFS is a network-based sharing protocol that requires high reliability of network transmission using TCP/IP

• Huawei hybrid flash storage supports mainstream storage network protocols such as iSCSI, NFS, CIFS, and FTP

• RDMA is a technology is a technology that moves buffer data between 2 server applications over a network

• Scale-up primarily utilizes existing storage systems by improving capabilities of multiple nodes simultaneously, continuously adding storage components for capacity expansion

• Huawei all-flash storage supports DTOE protocol offload technology, enabling IO to be sent directly from the network card to UserSpace for processing without going through KernelSpace

• QLC chips are suitable for frequent rewrites and SCM is unsuitable for server memory

• The amount of data backed up by incremental backup is less than differential backup

• HyperCDP provides continuous data protection capabilities

• HyperSnap shares the data of of the source LUN and does not provide true physical isolation, while HyperClone generates multiple different physical copies of a source LUN, allowing users to access them simultaneously without affecting the data on the source LUN

• Deduplication reduces space by removing redundant copies of data

• RPO in the disaster recovery system is used to measure the business recovery capability

• The disk enclosure in the storage system uses cabling

• NFS uses a client/server architecture

• Optical modules need to be a consistent with the label rate on the interface, in the module or you cannot use it

• Extent represents a fixed-size logical storage space divided based on CKG

• When using SmartThin tech to create a LUN space, if not truly allocated the space is not allocated

• The host writes a request to a controller engine before the engine writes the value directly to its local hard disk

• The WORM feature removes the full control permission enabling only read-only access

• Huawei's all-flash storage systems common LUNs and snapshots do not use the COW read-write method

• SmartMigration business data sync between the source LUN and the target LUN does not require the host to send I/O requests to the storage side

Explore data protection in Huawei hybrid flash storage using RAID2.0+, BBU, mirror memory, and hard disk pre-copy. Covers LUN components, RAID3, snapshot activation, storage management, SCSI card functions, and PCI Express advantages.