NETprotocol provides several different
options for Disaster Recovery to suit many different types of
disaster. Many different situations can be classified as a disaster
and dependant on the requirements backup systems can be implemented
to deal with every eventuality.
A single server failure can be a disaster for
a company if that server is mission critical and all users reply
on it. Central File & Print servers or E-Mail servers fit
in to the "mission critical" category for most organisations
as without access to documents and e-mails many users cannot carry
out their daily work. There are different way of protecting against
single server failure and in many cases "Server Clusters"
are used to provide continuous service even in the event of a
server failure. A "Server Cluster" is made of two or
more machines transparently acting as a single server. The advantage
of this is that if a member of the Cluster fails the remaining
server(s) will take over the role of providing the services.
Many organisations feel the need to prepare for
disasters of a more serious nature, such as fire or explosion,
disabling ALL central server equipment. In this scenario scaled
down replicas of all the key servers can be provided in a secondary
location to allow all the key users and many others to continue
working. To achieve this level of disaster recovery suitable locations
are required to house the backup servers and a method of keeping
all data syncronised is essential. |
