Modifying an Access Zone

Procedure

1. Choose Resources > Access > Service Network.
2. Select the desired account and subnet from the Account and Subnet drop-down lists, respectively.
3. In the Zone area, click More on the right of a desired access zone and select Modify.

   The Modify Zone page is displayed.

4. Modify basic information about the access zone.
   Table 1 describes related parameters.

   Table 1 Access zone parameters

   Parameter	Description
   Home Subnet	Subnet to which the zone belongs.
   Sub-domain Name	Sub-domain name of the access zone. The sub-domain name must be used together with the general DNS service of the subnet. This parameter needs to be set only when the file or HDFS service is enabled. NOTE: This parameter can be set only after the general DNS service is enabled for the home subnet. The value consists of letters, digits, and hyphens (-), and cannot start or end with a hyphen (-).
   Associated Namespace	If the HDFS service is enabled for the storage pool, click Select. On the Associate Namespace page that is displayed, select a namespace and click OK. NOTE: By default, the associated namespace takes effect 3 to 5 minutes later. The time when the namespace takes effect can be modified. For details about the modification commands, see Setting the Configuration File Cache Policy in the Maintenance Commands. This parameter is displayed only when IP Address Type of the home subnet is IPv4.
   DNS Policy	DNS policy of the zone. Possible options are as follows: Round robin If clients access services using domain names, nodes are selected to process service requests of clients based on the sequence recorded in the cache. Node connections If clients access services using domains names, nodes with the fewest connections are selected to process service requests of clients. CPU usage If clients access services using domains names, nodes with the lowest CPU usage are selected to process service requests of clients. Node throughput If clients access services using domains names, nodes with the lowest throughput are selected to process service requests of clients. NOTE: This parameter can be set only after the general DNS service is enabled for the home subnet.
   DNS Service	Whether to enable the DNS service to resolve the sub-domain name of the access zone. After the DNS service is enabled for the subnet, a sub-domain name is set for the zone, and the DNS service is enabled for the zone, you can access services in the zone through a domain name. NOTE: This parameter can be set only after the general DNS service is enabled for the home subnet.
   IP Address Failover	Whether to enable IP address failover. After IP address failover is enabled, if a node is faulty, its IP address can be automatically allocated to another normal node. Therefore, clients can continue to access the storage system using this IP address. After failover, the new access node takes over services of the faulty node as extra service load, which may cause the access node to be overloaded.

5. Click OK.