Considerations For Designing High Availability Data Centers:
More Is Not Always Better: People mistakenly believe that the
more redundancy a data center offers, the higher the level of
reliability. This is not always the case. Availability and redundancy
should be designed around the needs of the infrastructure. Data centers
with excessive levels of redundancy (those that surpass the needs of the
business) actually tend to experience less reliability because the
complexity of the network lends itself to failures and outages.Generators Fail: One place where redundancy is vital is with your data center’s generators. A recent report showed that up to 15 percent of generators fail after a mere 8 hours of running time and, even if the generator does not fail, the system is opened up to a host of issues that result from continuous generator use. Backup generators are critical to your data center and network’s availability.
Redundancy is About More Than Tier Requirements: Too many companies believe that the level of redundancy your data center offers is directly related to the tier technology level being utilized. In reality, physical location, building construction and equipment quality all factor into determining the level of redundancy experienced in your data center. Be sure to assess these factors when designing your data center and network.


