100% uptime - is that possible?

[koddos]

    I wonder if it's possible to provide 100% uptime, I mean server uptime?

[ldcdc]

It is possible -- for a limited time.

The longer the time frame, the higher the chances that something will go wrong and inexorably result in downtime. Nature is still more powerful than human kind, so just we can't protect anything with 100% certainty (think about disasters), not to mention our failure to produce perfect devices.

[ServerMicro]

yes its possible with cloud hosting, even tho, most hosts offer 99%

[ldcdc]

No, cloud hosting doesn't make 100% uptime for an indefinite/infinite time, a possibility. It may come with an inherent improvement on uptime, but that's it. If true 100% uptime would be something they could deliver, it would be their main selling point, and it would be a technical development on par with stuff like maybe the printing press.

[ServerMicro]

No, cloud hosting doesn't make 100% uptime for an indefinite/infinite time, a possibility. It may come with an inherent improvement on uptime, but that's it. If true 100% uptime would be something they could deliver, it would be their main selling point, and it would be a technical development on par with stuff like maybe the printing press.

do me a favour, google cloud hosting then come back and re answer the question! thanks

[ServerMicro]

my understanding of cloud is for 100% uptime, im not saying that the servers have 100% uptime, but the cloud itself does :/

[ldcdc]

Any machine has a statistical chance of failure. When you add redundancy, you change the overall system's chance of failure, but you can never take it to 100%. If the original machine/system has a 0.1% chance of failure in a year, and you now back that up with a similar machine, the system has a 0.1%*0.1% chance of failure. It may be very small, but it isn't 0. So, a cloud can have a high theoretical uptime, perhaps a very high one, but not 100%.

Of course, in real life, specifications seem to get altered as they meet the marketing department. We should not confuse a 100% uptime SLA with 100% true uptime. A SLA simply provides for a compensation when a certain level of service is not achieved, but the amount is usually not worth fighting over.

[Webcs-Peter]

There is difference between server uptime and network uptime, so what uptime is meant here?

[ldcdc]

Server or network, neither can be up 100% indefinitely.