Setting a Mode

Procedure

1. Choose Resources > Resources > Namespace.
2. Select a desired account from the Account drop-down list in the upper left corner.
3. Click a desired namespace name to go to the details page. Click the SmartTakeover tab.
4. Click Set Mode.

   The Configure SmartTakeover Mode page is displayed on the right.

5. Set the SmartTakeover mode. Table 1 describes related parameters.
   

   Namespaces with SmartTakeover enabled do not support dtree, snapshot, asynchronous replication, and SmartIndexing.

   Table 1 Parameter description of the SmartTakeover modes

   SmartTakeover Mode	Description
   Default	The default mode is set by default after a namespace is created, indicating that SmartTakeover is disabled. The namespace in default mode provides only the storage services and does not provide the metadata gateway function.
   Full forwarding	If SmartTakeover is enabled, a namespace in full forwarding mode can take over only one storage cluster and functions as a proxy to forward all service requests to the managed storage cluster. The namespace itself does not provide storage services.
   Local first	If SmartTakeover is enabled, a namespace in local first mode can take over only one storage cluster and functions as a proxy to forward specified service requests to the managed storage cluster based on user configurations. In addition, the namespace itself provides storage services.
   Local federation	If SmartTakeover is enabled, a namespace in local federation mode can take over one or more storage clusters and functions as a proxy to forward specified service requests to one or more specified managed storage clusters based on user configurations. In addition, the namespace itself provides storage services.
   Gateway federation	If SmartTakeover is enabled, a namespace in gateway federation mode can take over one or more storage clusters and functions as a proxy to forward all requests to one or more specified managed storage clusters based on user configurations. The namespace itself does not provide storage services.

   Table 2 Switchover of SmartTakeover modes

   		Switchover of Target SmartTakeover Mode
   		Default mode	Full forwarding mode	Local first mode	Gateway federation mode	Local federation mode
   Current SmartTakeover Mode	Default mode	--	√a	√	√	√
   	Full forwarding mode	Xb	--c	√	X	X
   	Local first mode	√	X	--	X	√
   	Gateway federation mode	X	X	X	--	X
   	Local federation mode	X	X	X	X	--
   a: The current SmartTakeover mode can be modified to the target SmartTakeover mode. b: The current SmartTakeover mode cannot be modified to the target SmartTakeover mode. c: The current SmartTakeover mode is the same as the target SmartTakeover mode and does not need to be modified. NOTE: The gateway federation mode cannot coexist with the full forwarding mode, local first mode, and local federation mode.

6. Click OK.