- How do you measure uptime and downtime?
- How do you find availability?
- What does 6 nines mean?
- What is a good uptime?
- What is the meaning of uptime?
- How can I get high availability?
- What is uptime in production?
- What does 5 nines mean?
- What is the difference between uptime and availability?
- How do you measure downtime?
- How should you calculate the monthly uptime percentage?
- How many nines is high availability?
- What is uptime percentage?
- What is Uptime in Web Hosting?
- What is uptime and downtime?
- Is 100 uptime possible?
- What is phone uptime?
- What are five nines in war?
- How is uptime calculated?
- How many hours is 99.99 uptime?
- What does uptime guarantee mean?
How do you measure uptime and downtime?
We calculate uptime by calculating the minutes of uptime divided by the total number of minutes for the specified period.
So, February has 29 days this year, 29 days x 24 hours x 60 minutes = 41760 minutes.
49 minutes of downtime, means that the site was up for 41711, and 41711 / 41760 = 0.9988, thus the 99.88% uptime..
How do you find availability?
Availability = Uptime ÷ (Uptime + downtime) For example, let’s say you’re trying to calculate the availability of a critical production asset. That asset ran for 200 hours in a single month. That asset also had two hours of unplanned downtime because of a breakdown, and eight hours of downtime for weekly PMs.
What does 6 nines mean?
Five-nines or 99.999% availability means 5 minutes, 15 seconds or less of downtime in a year. Or, if you are really ambitious, shoot for six nines or 99.9999% availability, which allows 32 seconds or less downtime per year. Otherwise, four nines or 99.99% availability allows 52 minutes, 36 seconds downtime per year.
What is a good uptime?
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.
What is the meaning of uptime?
functioning or able to function: time during which a piece of equipment (such as a computer) is functioning or able to function.
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 is uptime in production?
Manufacturers calculate uptime as a percentage of production run-time divided by available production time: Uptime = Run-Time (Production) ÷ Total Available Time Production Run-Time = Total Available Time to Run – Scheduled and Unscheduled Downtime Uptime identifies increases in production stoppages, product changeover …
What does 5 nines mean?
From Wikipedia, the free encyclopedia. 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. Nine (purity), a 99.999% pure substance.
What is the difference between uptime and availability?
Uptime is a measure of system reliability, expressed as the percentage of time a machine, typically a computer, has been working and available. This means that a system is ready for operation. … Availability is the probability that a system will work as required when required during the period of a mission.
How do you measure downtime?
The downtime productivity loss calculation is typically represented as: Number of users affected multiplied by the percent effect on productivity multiplied by the average burdened salary per hour multiplied by the duration of downtime equals downtime impact.
How should you calculate the monthly uptime percentage?
“Monthly Uptime Percentage” is calculated by subtracting from 100% the percentage of Minutes in the Month in which any Single Instance Virtual Machine using premium storage for all Operating System Disks and Data disks had Downtime.
How many nines is high availability?
Hitting 99.9% availability is better, at just under nine hours of downtime a year. Companies aiming for high availability (HA) talk about four nines (less than an hour of downtime a year), which is what we strived for during my time at Netflix.
What is uptime percentage?
Uptime is the amount of time that a service is available and operational. Uptime is generally the most important metric for a website, online service or web based provider and is expressed as a percentage such as ‘99.9%’. For example a 99.9% uptime equates to 43 minutes and 50 seconds of downtime.
What is Uptime in Web Hosting?
Website uptime is the time that a website or web service is available to the users over a given period. … Although 100% uptime is the goal, the industry considers 99.999% uptime as high availability. Every website experiences downtime planned or otherwise.
What is uptime and downtime?
Uptime is a computer industry term for the time during which a computer is operational. Downtime is the time when it isn’t operational. … For example, one standard for uptime that is sometimes discussed is a goal called five 9s – that is, a computer that is operational 99.999 percent of the time.
Is 100 uptime possible?
In a perfect world, 100% uptime can be achieved, but we do not live in a perfect world. As long as the possibility for network failure exists then one can safely say 100% uptime doesn’t exist. That’s not to say that they’re aren’t enough safeguards in place to practically state one operates with 100% uptime.
What is phone uptime?
Uptime is time during a machine, a computer stays without restarting. In brief, time which a machine give a functionnality, whatever, continuously. Now with the new Android application called DroidUptime, you will be able to register and record the uptime of your Android device.
What are five nines in war?
Definition: Five-Nines are 5.9 inch artillery shells used in WW1. Five-Nines were the most commonly used artillery shell, used by all sides. “Drunk with fatigue; deaf to even the hoots of tired, outstripped Five-Nines that dropped behind.”
How is uptime calculated?
So, how do you calculate the uptime percentage? The way we calculate uptime is easy to understand: we take the number of seconds that your monitor was down (in a certain time frame), and divide this by the total number of seconds your monitor was being monitored during that time frame.
How many hours is 99.99 uptime?
Percentage calculationAvailability %Downtime per yearDowntime per month99.8%17.53 hours87.66 minutes99.9% (“three nines”)8.77 hours43.83 minutes99.95% (“three and a half nines”)4.38 hours21.92 minutes99.99% (“four nines”)52.60 minutes4.38 minutes12 more rows
What does uptime guarantee mean?
An uptime guarantee is a pledge that your website will be up and accessible online for a certain percentage of the time. If not, you’re entitled to a refund. Many web hosts guarantee 99%, 99.99%, 99.999%, or even 100% uptime.