Novell BUSINESS CONTINUITY CLUSTERING 1.1 SP2 - ADMINISTRATION, Руководство администратора

Страница: 13 / 142

Overview
1
13
no
vd
ocx
(e
n)
13
Ma
y 20
09
1
Overview
As corporations become more international, fueled in part by the reach of the Internet, the
requirement for service availability has increased. Novell
®
Business Continuity Clustering (BCC)
offers corporations the ability to maintain mission-critical (24x7x365) data and application services
to their users while still being able to perform maintenance and upgrades on their systems.
In the past few years, natural disasters (ice storms, earthquakes, hurricanes, tornadoes, and fires)
have caused unplanned outages of entire data centers. In addition, U.S. federal agencies have
realized the disastrous effects that terrorist attacks could have on the U.S. economy when
corporations lose their data and the ability to perform critical business practices. This has resulted in
initial recommendations for corporations to build mirrored or replicated data centers that are
geographically separated by 300 kilometers (km) or more. (The minimum acceptable distance is 200
km.)
Many companies have built and deployed geographically mirrored data centers. The problem is that
setting up and maintaining the multiple centers is a manual process that takes a great deal of
planning and synchronizing. Even configuration changes must be carefully planned and replicated.
One mistake and the redundant site is no longer able to effectively take over in the event of a
disaster.
This section identifies the implications for disaster recovery, provides an overview of some of the
network implementations today that attempt to address disaster recovery, and describes how
Business Continuity Clustering can improve your disaster recovery solution by providing
specialized software that automates cluster configuration, maintenance, and synchronization across
two to four geographically separate sites.
Š Section 1.1, “Disaster Recovery Implications,” on page 13
Š
Section 1.2, “Disaster Recovery Implementations,” on page 14
Š Section 1.3, “Novell Business Continuity Clusters,” on page 21
Š
Section 1.4, “BCC Deployment Scenarios,” on page 22
Š Section 1.5, “Key Concepts,” on page 25
1.1 Disaster Recovery Implications
The implications of disaster recovery are directly tied to your data. Is your data mission critical? In
many instances, critical systems and data drive the business. If these services stop, the business
stops. When calculating the cost of downtime, some things to consider are
Š File transfers and file storage
Š
E-mail, calendaring, and collaboration
Š Web hosting
Š
Critical databases
Š Productivity
Š
Reputation