Is 99% uptime good?
If your business uses a service with a 99% uptime guarantee that means you should expect: 14 minutes, 24 seconds of downtime every day; 6 hours, 43 minutes and 12 seconds of downtime every month and.
What does 99.9% uptime mean?
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.
How many hours is 99% uptime?
|Availability %||Downtime per year||Downtime per month|
|99% (“two nines”)||3.65 days||7.31 hours|
|99.5% (“two and a half nines”)||1.83 days||3.65 hours|
|99.8%||17.53 hours||87.66 minutes|
|99.9% (“three nines”)||8.77 hours||43.83 minutes|
How do you get 99.9 uptime?
To rely on cloud services, it is an industry standard to guarantee 99.9% service uptime. That means solution providers must have less than 90 seconds of downtime in a day, less than 45 minutes a month and less than 9 hours of downtime in a year.
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 uptime is good?
It’s generally understood that 99.9% uptime is a hosting industry standard, whereas five nines or better (99.999% and up) is the ideal. 99.9% uptime means your website may be down for a total of eight hours, 45 minutes, and 57 seconds each year.
How many minutes per month downtime is 99.99 availability?
|SLA||Downtime per week||Downtime per month|
|99%||1.68 hours||7.2 hours|
|99.9%||10.1 minutes||43.2 minutes|
|99.95%||5 minutes||21.6 minutes|
|99.99%||1.01 minutes||4.32 minutes|
What is the difference between uptime and availability?
Where availability measures the percentage of locations that can successfully reach your server, Uptime measures whether the server is reachable at all. Uptime is calculated, in each test interval, as either 100% if one or more locations can successfully reach the server, or 0% if none can.
What is considered good uptime?
Most services fall somewhere between 99% and 100% uptime. The industry generally recognizes this as very reliable uptime. A step above, 99.99%, or “four nines,” as is considered excellent uptime. But four nines uptime is still 52 minutes of downtime per year.
How can I get high availability?
Here are some of the key resources you can implement to make high availability possible:
- Implement multiple application servers.
- Scaling and slaves matters.
- Spread out physically.
- Maintain a recurring online backup system along with hardware.
- Use of a virtualized server for zero-downtime recovery.
What does it mean to have 99.99% uptime?
As we have already figured out, uptime and availability are time-based metrics. You can use a calculator or a conversion cheat sheet to get the figures for the specific target levels. For example, 99.99% uptime means that a system should be available 99.99% of its designated operational time.
What does it mean to have 99.999% availability on a computer?
Having a computer system’s availability of 99.999% means the system is highly available, delivering its service to the user 99.999% of the time it is needed.
How is the uptime of a computer system measured?
A. The uptime and reliability of computer and communications facilities is sometimes measured in nines. Having a computer system’s availability of 99.999% means the system is highly available, delivering its service to the user 99.999% of the time it is needed.
How much downtime do you get per year?
In other words you get a total downtime of approximately five minutes and fifteen seconds per year with 99.999% uptime. A service level agreement (SLA) is a part of a service contract where the level of service is formally defined including uptime.