Five Pressing Answers about High Availability Data Centers
High availability data centers can be absolutely crucial for companies that run high-impact applications. High availability is tested by using the “five 9s” method (99.999%). The goal of any data center is, of course, 100% availability, but a system is still considered highly available if it has 6 minutes or fewer of downtime annually. “Five 9s” is difficult to achieve, but it’s attainable. We’ll answer your pressing questions on high availability so your data center can be as efficient as possible.
Why do I need a high availability data center?
High availability affords you continuous access to data even if your servers lose network connectivity or fail completely. High availability is also necessary if one or more of your running applications fail.
How is a high availability data center organized?
High availability data centers ensure that your system never goes down, even in times of emergency. A primary power circuit should be provided by your Uninterruptible Power Supply (UPS) and should be backed up by a primary generator. A secondary circuit is provided by a second UPS and should be backed up by a second generator, in addition to a primary and secondary Internet uplink. Your hardware, firewalls, and switches should also be redundant.
What is all this I keep hearing about redundancy?
Redundancy is important, as detailed above. If your setup is too redundant, however, it can actually make your system too complex and cause more problems. You also may not get much more reliability by moving from a 2N UPS configuration to a 2 (N+1) configuration (or in other words: two times the IT load + one more module). While the latter system is more complex, both are equally likely to fail. Generator redundancy is also important, since around 15-percent of generators fail after eight hours of runtime.
What happens to data centers in emergencies?
In considering emergency policies, high availability should be taken into consideration when IT and facilities departments designers decide on a number of factors, including facility tier level, number of physical data centers, and location. Additionally, if the worst does happen, you’ll want to have an offsite backup if you must physically move your operations.
I still don’t get it. What can I do?
High availability data center plans are essential in operating effectively in today’s world. Luckily we at Silverback Migration Solutions can help with data center facility evaluation and data center design, so you can create your ideal high availability model with the help of our expert opinions.
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