Describe the alarm that is triggered when a volume is under replicated.
Replication Alarm
VOLUME_ALARM_DATA_UNDER_REPLICATED
The volume replication factor is lower than the desired replication factor set for the volume. This can be caused by failing disks or nodes, or the cluster may be running out of storage space.
Investigate any nodes that are failing. You can see which nodes have failed by looking
at the Node
Health pane in the Overview page on the Control System.
Determine whether it is necessary to add disks or nodes to the cluster. This alarm is
generally raised when the nodes that store the volumes or replicas have not sent a
heartbeat for five minutes. To prevent re-replication during normal maintenance
procedures, Data Fabric waits a
specified interval (by default, one hour) before considering the node dead and
re-replicating its data. You can control this interval by setting the
cldb.fs.mark.rereplicate.sec parameter using the config
save command. For additional troubleshooting information, see how to handle this alarm.