Modifying a Zone

Procedure

1. Choose Services > HDFS Service > Service Network.
2. Click More on the right of the desired zone and select Modify.

   The Modify Zone page is displayed.

3. Configure basic zone information.
   Table 1 describes related parameters.

   Table 1 Zone parameters

   Parameter	Description
   Sub-domain Name	Indicates the subdomain name of the zone. This function must be used together with the DNS function in the subnet.
   Associate File System	Click Select. On the Associate File System page that is displayed, select a file system and click OK. NOTE: This parameter is available only when Zone Type is set to NameNode.
   DNS Policy	Indicates the 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. Number of 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. Port throughput If clients access services using domains names, nodes with the lowest throughput are selected to process service requests of clients.
   DNS	Indicates whether to enable the DNS service.
   IP Address Failover	Indicates whether to enable IP address failover. After this parameter is enabled, when 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. NOTE: This parameter is available only when Zone Type is set to NameNode.

4. Click OK.