Downtime must be considered from a number of aspects.
Business Needs Assessment.
-
System outage time.
-
System/business recovery
time.
o
Reputational integrity –
directly affects share price.
o
Cost of customer loyalty
o
Potential gain for
competition.
-
For financial services
companies, other key considerations could include regulatory requirements
-
By understanding the total
time lost to unscheduled downtime (outage + Recovery) x the total cost/hr to
the business by not having system availability, the business shout be able to
determine the level of redundancy required to support the business needs.
-
The potential losses
incurred as a result of downtime must be balanced against the additional costs
associated with higher levels of availability.
-
Fines imposed by regulatory
authorities for late submissions of reports.
-
Penalties imposed for a
lack of up to date trading information.
-
Can result in substantial
financial loss due to inability to trade.
Business Needs Assessment.
-
How dependent is the
business on the data center
-
What physical size/space is
required
o
Now
o
Later
o
Ultimately
-
What level of availability
is expected.
o
Variable?
-
What is the impact of
downtime on the business in $
-
What can the business
afford in $
-
What already exist, what
other facilities could be utilized.
Three main are need to be considered:
1.
Available time for planned
maintenance
-
Determined by type of business, workload and
redundancy level
2.
Acceptable amount of time
for unplanned outage
-
Determined by level of dependence of the business on
the availability of the data center
3.
Overall impact of
unscheduled outage on business performance
-
The effect of 2. Above on the business as a whole in
terms of lost revenue, damage to reputation, exploitation of opportunity by
competitors.
Important notes to be considered.
-
The choice of the most
appropriate Data Center availability level for the business is a C class
decision.
-
TCO and ROI must be fully
understood.
-
The facility design must
meet the business availability requirement.
-
All options must be explored.
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