Redundancy ratios supported by OceanStor 9000

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OceanStor 9000 supports +1, +2, +3, +4, +2:1, and +3:1 redundancy ratios.

Other related questions:
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.

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.

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.

Sharing protocols supported by OceanStor 9000
OceanStor 9000 supports CIFS, NFS, and FTP. Directories and files can be shared in CIFS, NFS, and FTP mode at the same time.

Optional maintenance hardware of OceanStor 9000 V100R001C01
A short message service (SMS) modem, keyboard, video, and mouse (KVM) can be configured on OceanStor 9000 V100R001C01 for ease of device maintenance. The SMS modem sends SMS notifications to maintenance personnel when an alarm is generated. KVM connects the ports of keyboard, video, and mouse of nodes to facilitate user access and storage device control.

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