Measure server downtime?

[RenoWV]

I realize there are scripts that can measure the server uptime and server load, but I was wondering if it's possible to measure server downtime over a specified period. For example, we would access a .shtml page that would say something like "The server was down 4 hours 6 minutes 12 seconds since the first of the month".

Or is something like that impossible because, by definition, the server is not working?

Just curious...

 

[bluedragon2]

Write the date/time to a file during shutdown and during startup. Then you will have a log of downtiome.



[Blue]Blue[/Blue] [Dragon]

If I wasn't Blue, I would just be a Dragon...

 

[RenoWV]

Thanks bluedragon2 -- do you mean by this to use a date/time javascript?

I was actually wondering if there was a perl script that would keep the tally over a longer time period than shutdown/startup, but as I said, that may not be possible...

 

[bluedragon2]

Are you talking about a power down/up or an application down/up?



[Blue]Blue[/Blue] [Dragon]

If I wasn't Blue, I would just be a Dragon...

 

[RenoWV]

I understand that a website hosted at a moderately priced ISP may be "down" for a minimal amount of time each month -- let's say 2 minutes per day -- due to maintenance needs or whatever. What I don't want of course is for one of my sites to be down for more than that minimally acceptable time.

I sometimes access cgi scripts from my browser that measure the uninterrupted uptime, with readings such as:

15:07:49 up 5 days, 18:00, 0 users, load average: 0.02, 0.03, 0.00

What I'd like to know is whether it's possible for a similar measurement of total DOWN time over a specified time (like 30 days). I've never seen anything like this, but that's not to say that such a tool does not exist. Just wondering if it's a statistic that is possible to measure from the client side, using an installed perl script?

 

[bluedragon2]

Don't know of a script for that function, but there is a perl forum here with some pretty good guru's, might try there.

I wish I had that load average in your example

Sorry I couldn't be of more help.



[Blue]Blue[/Blue] [Dragon]

If I wasn't Blue, I would just be a Dragon...

 

[RenoWV]

Thanks for the suggestion bluedragon2 -- I posted the question at the TekTips perl forum...

 

[tikual]

Simply you can get the time by follows and then do calculation.

last | grep reboot <--- get down time
uptime <--- of course get up time

tikual