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What does 99% uptime mean?
If your business uses a service with a 99% uptime guarantee that means you should expect: 14 minutes, 24 seconds of downtime every day; 1 hour, 40 minutes and 48 seconds of downtime every week; 6 hours, 43 minutes and 12 seconds of downtime every month and.
How many nines is high availability?
Amazon, Google, and Microsoft’s set their cloud SLAs at 99.9%. The industry generally recognizes this as very reliable uptime. A step above, 99.99%, or “four nines,” as is considered excellent uptime.
What does 99.999 mean?
Five nines, commonly taken to mean “99.999%”, may refer to: High availability of services, when the downtime is less than 5.26 minutes per year.
What is nines availability?
People typically talk in terms of nines of availability, which expresses system availability (uptime) as a percentage of total system time. Availability at 99% is OK as far as it goes, but that equates to more than seven hours of downtime per month.
How many hours is 99 downtime?
Percentage calculation
| Availability % | Downtime per year | Downtime per month |
|---|---|---|
| 95% (“one and a half nines”) | 18.26 days | 36.53 hours |
| 97% | 10.96 days | 21.92 hours |
| 98% | 7.31 days | 14.61 hours |
| 99% (“two nines”) | 3.65 days | 7.31 hours |
What does 4 nines mean?
Jul 8, 2016·4 min read. Let’s start with what 4 9’s means exactly: Four Nines is 4.38 minutes downtime per month, or 52.56 minutes per year. That’s probably more than acceptable for almost all services on the Internet, not all, but almost all. So your email is down for 4 minutes each month, not the end of the world.
What does 5 nines mean?
Availability is normally expressed in 9’s. For example, “5 nines uptime” means that a system is fully operational 99.999% of the time — an average of less than 6 minutes downtime per year. The chart shows what impact various availability levels have on your server downtime.
What does 6 nines mean?
According to my calculations, five nines of downtime is 5.26 minutes per year, figuring a year is 365.2422 days (as noted in this NASA paper). Six nines is 32 seconds. Or I could have just looked it up on Wikipedia. EDUCATIONAL RESOURCES.
How can I get five nines?
To achieve five nines, all components of the system must work seamlessly together. Software applications, compute resources, networking functionality, and physical data center services must be highly available to achieve five nines.