Three nine or 3 9s availability – 99.9 percent – allows for 8 hours and 46 minutes of Downtime annually. Network downrate literally translates into measurable hours, minutes, and seconds of downtime of authorized network services.
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What are the 3 9’s or Three Nines?
We assume that some faults will require a manual decision to trigger the recovery. However, with further automation of this scenario, we assume that only two events per year would require such a decision. Deciding to restore takes 30 minutes; we assume the restore will be completed in 30 minutes. Recovery from this breakdown takes 60 minutes. Assuming two events per year, our estimated impact time for the year is 120 minutes.
This means that the maximum availability threshold is 99.95%. Actual availability also depends on the failure rate, the failure duration, and how quickly each failure is recovered. This architecture requires the application to go offline for a period of time for updates, but these updates are automatic. To do this, we estimate 150 minutes a year: 15 minutes per shift, 10 times yearly. That is up to 270 minutes a year when the service is unavailable, so our design goal for availability is 99.9%.
99.9% Uptime vs. 99.999% Uptime
While 99 percent may not seem like a huge difference, unplanned downtime can cost your business thousands of dollars.
According to Veeam’s 2021 Data Protection Report, the average cost of an hour of downtime is $84,650. While the cost of downtime varies by industry and company size, downtime can quickly become a costly problem. Your business can’t work when your business can’t communicate with customers, and employees can’t collaborate for part of the workday; your business can’t work.
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But with 99.9% uptime, this is what should happen
With a 99.9% uptime SLA, your business could experience up to 8.76 hours of downtime per year or about 10 minutes weekly.
| Availability % | Downtime per year |
| 99.8% | 17.52 hours |
| 99.9 (“3 9s”) | 8.76 hours |
| 99.95% | 4.38 hours |
| 99.99 (“4 9s”) | 52.56 minutes |
| 99.999% (“5 9s”) | 5.26 minutes |
With Five Nine, which means you have a 99.999% uptime guarantee, you can count on less than 26 seconds of downtime per month and no more than 5.26 minutes per year.
So which is best for your business? 8 hours or 5 minutes of potential downtime?
Is There Such a Thing as 100% Availability?
Your Cloud service will always be available to users in a perfect world, but 100% availability is extremely rare. And cloud providers generally do not guarantee zero downtime because a lot can go wrong when dealing with complex cloud infrastructure.
However, availability issues are unlikely to surface for months. And with the right service provider and high cloud uptime guarantee, your users might not even notice the occasional few seconds of downtime.
Your business goal is to maximize your business downtime by determining whether you are willing to risk potential downtime.
For most businesses, “five nine” is the gold standard. This adds up to about six seconds of potential downtime per week.
Evaluating your SLAs
High-Quality Data Centers. _ Engineers must have a high level of architecture, security, and expertise.
Before signing up for a cloud service, you should review the uptime guarantee in your service level agreement to confirm that your provider can deliver the level of performance your business needs. This information will tell you how reliable your cloud service is. It also says a lot about the quality of the host in general. If they can provide at least five or nine, you know they are doing everything possible to provide the best for their customers.
In addition to high reliability, the focus should also be on security, integration, and support. Here are some things you should expect.
- Comprehensive physical data center security
- Multi-tenant platform security
- Network intrusion protection and enterprise-class firewalls
- Data replication at the server and client level
- Third-party audits to verify the effectiveness of security controls
- Included custom cloud migration
- Onboarding that won’t lead to downtime or data loss
- Support around the clock and access to senior technicians
How Intermedia Offers 99.999% Uptime?
When you choose Intermedia for your cloud services, you can count on industry-leading availability. We understand how important it is to have access to your cloud communication tools at all times. Whether your customers can’t connect with your contact center agents to resolve an issue or your employees can’t access your system for work, downtime is a risk your business shouldn’t address.
Intermedia offers economically backed service level agreements (SLAs) that guarantee 99.999% cloud uptime. We can do this because of our world-class data centers, the ISPs we use to connect our data centers to the world, and the expertise and experience of our cloud architects and engineers. Learn more about our infrastructure and how we can deliver improved reliability and performance in our white paper; not all clouds are created equal.
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This post first appeared on What Is 5 9's? Availability, Uptime, Downtime, please read the originial post: here
