Database Reference
In-Depth Information
Understanding the secondary namenode
UI
The secondary namenode is a checkpoint service for the namenode daemon that performs
periodic merging of the
edits
log and the
fsimage
file. The secondary namenode UI
can be accessed using the following URL:
http://<secondary-namenode-server>:50090/
The following screenshot shows the secondary namenode UI:
Just like the namenode UI, the secondary namenode UI also displays the Hadoop version.
All checkpoint related information is available in this UI, which are given as follows:
•
Name Node Address
: This is the RPC address of the primary namenode daemon.
Secondary namenode uses this address to connect to primary namenode.
•
Start Time
: This is the start timestamp of the secondary namenode service.
