Lets remember that all of these numbers often exclude regularily scheduled maintenance. Equipment does need maintenance and will have to be taken down from time to time. When you have complex apps or services that rely on dozens or hundreds of components, 5 nines is difficult to achieve. Such uptimes has so many clauses that 99.999% uptime is rarely achieved.
socket, no need to insult me. You seem to know what you are doing, so I admit you may have achieved it. It's rare, but if you say so, I'm happy to believe you.No need to resort to insults dude. :)
According to Walmart's 2005 AR, they brought in $285 Billion - With a "B".This is $781 million per day. $32.4 million per hour. $9 thousand dollars per second! Settling for 99.999% uptime means giving up $16 million dollars.
I don't believe that people understand what 100% uptime means. That means that a process never fails, software never crashed, hardware never fails. Assuming that you have a server with two NICs is connected to two switches, NIC A sends a frame to Switch A, while the frame is still on the wire, SWITCH A is reloaded, since that packet or next set of packets is dropped, you've just blown your 100% uptime. Pseudo 100% uptime, where the application appears to be up to the use base 100% of the time, is still not 100% uptime. All clustering and fail-over takes time [SONNET has a 50ms fail-over time], 50ms may not be much but it is an outage.
Ender, I don't think you get it. Socket can get 100% uptime because he is a networking god. In fact, he is so good, he actually changes the laws of physics so that the frames travel instantaneously so that packets are never dropped because of a switch reload. Geez. Why don't you believe he has 100% uptime?
LOL @ enzomediciYou must be using VOIP dude?By LAW landline phone companies must guarantee 5 9s uptime, barring wildly unforeseen circumstances, such as nuclear annihilation. The phrase 5 9s even originated from this issue.
>By LAW landline phone companies must guarantee 5 9s uptime, barring wildly unforeseen circumstances, >such as nuclear annihilation. The phrase 5 9s even originated from this issue.Right. And when an LA radio station has a contest to giveaway 10 free Rolling Stones tickets to the 49th caller and the circuits max out, that's not 99.999% to me or the other thousands of callers. 9/11 same thing happened. Land lines are certainly not five nines uptime.
tomaburqueDec 8, 2005
I think Wal Mart needs to upgrade how they treat their employees so I don't have to pay for the food stamps of their full time employees.
Closed AccountDec 8, 2005
This account has been closed by the user
ender78Dec 8, 2005
Lets remember that all of these numbers often exclude regularily scheduled maintenance. Equipment does need maintenance and will have to be taken down from time to time. When you have complex apps or services that rely on dozens or hundreds of components, 5 nines is difficult to achieve. Such uptimes has so many clauses that 99.999% uptime is rarely achieved.
double_zDec 8, 2005
socket, no need to insult me. You seem to know what you are doing, so I admit you may have achieved it. It's rare, but if you say so, I'm happy to believe you.No need to resort to insults dude. :)
marillionDec 8, 2005
According to Walmart's 2005 AR, they brought in $285 Billion - With a "B".This is $781 million per day. $32.4 million per hour. $9 thousand dollars per second! Settling for 99.999% uptime means giving up $16 million dollars.
ender78Dec 8, 2005
I don't believe that people understand what 100% uptime means. That means that a process never fails, software never crashed, hardware never fails. Assuming that you have a server with two NICs is connected to two switches, NIC A sends a frame to Switch A, while the frame is still on the wire, SWITCH A is reloaded, since that packet or next set of packets is dropped, you've just blown your 100% uptime. Pseudo 100% uptime, where the application appears to be up to the use base 100% of the time, is still not 100% uptime. All clustering and fail-over takes time [SONNET has a 50ms fail-over time], 50ms may not be much but it is an outage.
corptDec 8, 2005
Ender, I don't think you get it. Socket can get 100% uptime because he is a networking god. In fact, he is so good, he actually changes the laws of physics so that the frames travel instantaneously so that packets are never dropped because of a switch reload. Geez. Why don't you believe he has 100% uptime?
jasqwertyDec 9, 2005
LOL @ enzomediciYou must be using VOIP dude?By LAW landline phone companies must guarantee 5 9s uptime, barring wildly unforeseen circumstances, such as nuclear annihilation. The phrase 5 9s even originated from this issue.
enzomediciJan 31, 2006
>By LAW landline phone companies must guarantee 5 9s uptime, barring wildly unforeseen circumstances, >such as nuclear annihilation. The phrase 5 9s even originated from this issue.Right. And when an LA radio station has a contest to giveaway 10 free Rolling Stones tickets to the 49th caller and the circuits max out, that's not 99.999% to me or the other thousands of callers. 9/11 same thing happened. Land lines are certainly not five nines uptime.
rigoriousDec 10, 2008
it means:"percentage of uptime - downtime"