This is the 16th day of my participation in the August More Text Challenge. For details, see “August More Text Challenge”.

HyperMetro is the array-level A/A HyperMetro technology. Two sets of storage systems can be deployed in the same host, the same city, or two places 300 km apart.

HyperMetro For Block

HyperMetro synchronizes the data of two luns from two sets of storage arrays in real time, and both luns can provide host read/write access. When either end of the disk array fails, the host switches the access path to the normal end to continue service access. When the link between disk arrays fails, only one end continues to provide read/write access to the host. Which end provides services depends on the arbitration result. A quorum server is deployed at a third-party site to determine which storage device continues to provide services when the link between two storage arrays is interrupted. HyperMetro supports both FC networking (8G/16G/32G) and IP networking (10GE/25GE/40GE/100GE).

Main technical features of NAS hypermetro:

  1. Gateway – free active-active solution: Gateway – free I/O requests do not need to be forwarded by the storage gateway, avoiding I/O latency caused by gateway forwarding. At the same time, reduce the gateway failure point, improve the reliability of the scheme; Significantly reduces the complexity of active-active networking and facilitates maintenance.
  2. Simple networking: Integrate hypermetro data replication links and configure synchronous links and heartbeat links on one physical network to simplify the networking of two data centers. The replication links between two storage systems can use IP or FC links. Considering that the front-end service link must be an IP network, HyperMetro can work in an all-IP network environment to reduce the construction cost.
  3. NAS hypermetro based on vstores: In traditional NAS hypermetro mode, nodes in a cluster are deployed in two data centers to implement hypermetro between data centers. Flexible resource configuration and optimization cannot be implemented. Huawei NAS hypermetro implements the hypermetro relationship by having vstores deployed in two data centers. The data and configurations of the vstores are reflected in real time. Each vStore has its own independent arbitration result, providing high cross-site availability.

HyperMetro For File

HyperMetro enables hosts to treat the file systems of two storage systems as a single file system on a single storage system, and to make the data on the two file systems identical. NAS hypermetro Provides read and write services on the primary end and synchronizes data to the secondary end in real time. When the primary site is faulty, the secondary site automatically takes over services from the primary site without data loss or interruption. NAS Active-active provides customers with the following benefits: Cross-site high availability continuous protection Easy management Prevents data loss, reduces system downtime, and fast disaster recovery. Troubleshooting without application or user awareness. NAS Active-active supports both FC networking (8 GBIT/s, 16 gbit/s, or 32 GBIT/s) and IP networking. (10 ge / 25 40 ge ge / / 100 ge).

  1. Automatic recovery: If A fault occurs at site A, the vStore Pair switches to site B. After the fault is recovered, the vStore Pair automatically initiates resynchronization without manual access. After the resynchronization is complete, the hypermetro becomes normal. In this state, if site B fails again, the hypermetro can be switched to site A without service interruption.
  2. Easy upgrade and expansion: If you need to configure hypermetro for existing services, you only need to purchase the license and upgrade it to the latest software version. Then you can configure hypermetro for another storage array without additional data migration. Therefore, you can choose to configure hypermetro initially or extend hypermetro later.
  3. FastWrite: In normal SCSI Write processes, Write requests include Write Alloc and Write Data interactions. A Write request requires two round trips between sites to complete. The Fastwrite feature optimizes the storage transfer protocol by reserving cache space for receiving write requests at the target end in advance, eliminating the write allocation function and allowing only one interaction. This feature halves the data synchronization duration between storage arrays and improves the overall performance of the hypermetro solution.
  4. Link quality adaptive: If two data centers have multiple links, HyperMetro automatically balances loads among the links based on the link quality. The system dynamically monitors link quality and dynamically adjusts the load balancing ratio between the two links to reduce the retransmission rate and improve network performance.
  5. Compatible with existing features: HyperMetro can be used at the same time with existing features such as SmartThin, SmartQoS, and SmartCache. It can be combined with HyperSnap, HyperReplication, and HyperVault to form a more complex and advanced data protection scheme (for example, local hypermetro + remote replication geo-redundant DISASTER recovery).
  6. Dual quorum: HyperMetro supports two quorum servers. If one of the two quorum servers fails, the system seamlessly switches to the other quorum server, reducing the risk of single point of failure and improving HyperMetro reliability.

Thank you very much