What's the Category for data redundancy ratios on OceanStor 9000?


Support for multiple redundancy ratios such as +1, +2, +3, +4, +2:1, and +3:1.

Other related questions:
Redundancy ratios supported by OceanStor 9000
OceanStor 9000 supports +1, +2, +3, +4, +2:1, and +3:1 redundancy ratios.

Storing redundant data on dedicated disks or nodes or providing redundancy between disks during data protection on OceanStor 9000
OceanStor 9000 does not store redundant data on any dedicated hot-spare disks or nodes for data protection. All storage nodes are provided for the same purpose. Raw data and redundant data are evenly stored on all nodes and disks of OceanStor 9000 which are available as recovery resources.

Relationships between redundancy ratio, strip size, and read/write performance of OceanStor 9000
Relationships between redundancy ratio, strip size, and read/write performance of OceanStor 9000: The redundancy ratio and strip size of OceanStor 9000 directly impact on the storage space utilization. The strip size determines the data slice size. The data slice size is set based on the average size of files in actual services to prevent improper data slices due to a too large strip size, avoiding space waste. Particularly for small files, small strips of 16 KB are needed. The redundancy ratio determines the number of verification data copies and directly impacts on the storage space utilization. For the N+M redundancy ratio in the Erasure Code algorithm, M can be 1, 2, 3, or 4. A larger value of M indicates poorer algorithm performance and more complex computing. N can be 3 to 16. A larger value of N indicates higher algorithm performance and more disks concurrently read/written.

Deployment of OceanStor ReplicationDirector in the disaster recovery data center solution (geo-redundant mode)
OceanStor ReplicationDirector (current major version: V100R003C10) is deployed in the disaster recovery data center solution (geo-redundant mode) in the following manner: 1. You can deploy one piece of OceanStor ReplicationDirector in one data center to centrally manage the local production center, local disaster recovery center, and remote disaster recovery center, or you can deploy one at the local disaster recovery center and one at the remote disaster recovery center to achieve disaster recovery management. 2. When deploying one piece of OceanStor ReplicationDirector, you are advised to deploy it at the disaster recovery center that provides the fastest service recovery services. Ensure that the management server can communicate through the management network with service hosts and storage devices at all three sites.

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