What is Failover?
Failover is the capability of switching over of the primary server to
the standby server upon the failure of the primary server. Failover is
the capability to take the backup online without shutting down and
starting the central server. This allows uniterrupted report generation
with no loss of real time data.
How does Failover feature work?
NetFlow Analyzer Enterprise Edition 6.5 provides incremental data back
up and high availability feature for Central Server data. A typical
enterprise edition set up consists of a Central Server machine and
multiple Collectors. In order to use FailOver feature, an
additional machine identical to Central Server's hardware specification
is required. Please refer the below set up for FailOver:
A and Machine B are identical in terms of hardware configuration.
Primary Central Server is started in Machine A and acts as the usual
Central Server that collects data from Collectors and generates
reports. HotStandBy Server is started in Machine B. HotStandBy
Server(B) just watches the health of Primary Server (A)
up the data with Primary Server(A) through MySQL data replication. This
ensures that there is two copies of data.
When the Primary
Central Server(A) crashes, HotStandBy Server(B) automatically restarts
as New Primary Central Server (B). Please refer the below image:
The Collectors will automatically start sending the collected data to
the New Primary Central Server (B).
the crashed server started again, it will automatically starts as New
HotStandBy Server (A). Please refer the below image:
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