Computing data distribution when adding a new node to OceanStor 9000

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Computing data distribution when adding a new node to OceanStor 9000: Data slices of OceanStor 9000 are achieved using Erasure Code. For details, see:
- Information about data protection in OceanStor 9000 V100R001C01 Administrator Guide 11
- OceanStor 9000 V100R001 Erasure Code Multimedia 03

Other related questions:
Computing data distribution for OceanStor 9000
Data distribution for OceanStor 9000 is computed by CA using the HASH algorithm based on the FID of a file and the offset and length of the current operation.

Distributing data slices evenly on each node of OceanStor 9000
Distributing data slices evenly on each node of OceanStor 9000: Data slices of OceanStor 9000 are achieved using Erasure Code. For details, see: - Information about data protection in OceanStor 9000 V100R001C01 Administrator Guide 11 - OceanStor 9000 V100R001 Erasure Code Multimedia 03

OceanStor 9000 V100R001C01 data recovery for a failed node
OceanStor 9000 V100R001C01 recovers data for a failed node using the following methods: 1. If the failed node turns normal, OceanStor 9000 V100R001C01 recovers data changes within the offline duration to a normal node and ensures zero loss of original data on the failed node. 2. If the offline node requires an operation by the administrator, OceanStor 9000 V100R001C01 obtains the data on the failed node through calculations and writes the data to disks of other normal nodes.

Computing Erasure Code for OceanStor 9000
Computing Erasure Code for OceanStor 9000: In a normal read/write process, Erasure Code is computed at the CA layer. In a data recovery process, Erasure Code is computed at the OBS layer.

Adding OceanStor 9000 V100R001C01 to an AD domain
Procedure for adding OceanStor 9000 V100R001C01 to an AD domain: 1. Log in to DeviceManager. 2. Check DNS server settings. a. Choose Settings > Cluster Settings > Basic Information > External DNS Server's Configuration. b. Confirm that DNS server IP addresses have been correctly set. If the IP addresses are incorrect or have not been set, set them in the corresponding text boxes. c. Click Test. If a success message is displayed, the DNS server has been configured. If no success message is displayed, troubleshoot network connectivity faults. 3. Add OceanStor 9000 to an AD domain. a. Choose Settings > Cluster Settings > Authentication Settings > Domain Authentication Settings. b. Under AD Domain, set Administrator username, Password, and Full domain name of the AD domain. c. Click Join. After the operation succeeds, Domain Status becomes Join Domain.

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