in the database should be secured by applying the appropriate methods. The
methods for recovery of the data should be confirmed for any failure.
For redundancy of the data in the database for CBM-NET, the following methods
and configurations are applied to the CBM-NET system.
a.
Database Servers are configured with the HA function (already available in
Phase 1).
b.
SAN Storage has a redundant configuration and is selected as the equipment
for the data area of the database to avoid single point of failure (SPOF) (already
available in Phase 1).
c.
The data in the database22 is replicated to the database at the DR site (added
in Phase 2).
d.
The business data is backed up at end of day to the LTO tape library (already
available in Phase 1).
Requirements for the data recovery in case of failure are satisfied by applying the
above methods.
Production Env.
DR Env. [*]
AP Server
#1
AP Server
#1
a.) HA Configuration of
DB server
DB Server#2
(Standby)
DB Server#1
(Active)
Backup
Server
Take over
SAN Storage
DB Server#1
(Active)
Asynchronous
replication
SAN Storage
Backup
DB
DB
(business data)
(business data)
LTO Tape Library
d.) Daily Back up of
business data
b.) Multiple hardware
component in SAN
Storage (controller,
hard disk)
c.) Replicated data
using DB function
(*) Some of the components including DB Server #2 and Backup Server are omitted to simplify the diagram
Source: Preparatory Survey Team
Figure 3-25 Conceptual diagram of redundancy of the data in database
22
Data from both Front DB and Main DB will be replicated to those at the DR site.
66