Database Reference
In-Depth Information
Using the preceding steps, an administrator can perform a manual transition from one na-
menode to the other.
NameNode Journal Status for the Shared Storage-based approach
The following screenshot shows the
NameNode Journal Status
for the standby namen-
ode in the Shared storage-based approach. As you can see in the following screenshot, the
standby namenode in the Shared Storage-based approach is only allowed to read from the
shared storage:
As you can see in the following screenshot, the active namenode in a Shared Storage con-
figuration is allowed to write to the common shared location:
