Cron / second precision ?
 

Hi there!

I'm wondering - CRON entry allows to set up a cron job with minutes, hours, days etc.
But what if i need to do something at 6:23:38 ? I mean, i need second precision?

I don't know if cron can be relied upon to always start jobs at the full minute. If it can, then adding your job as should do the trick.

Yeah, but sleep 38 means processor usage by 38 sec?
If yes, that is not the answer i was expecting on. I need to take carve about processor usage.

My cron jobs always start after the minute, and not precisely - at least 9 out of 10 times it's :01, with the rest being :02. I wouldn't be surprised if on a more heavily loaded system it would vary more and sometimes run later.

Sleep uses no (or virtually no) CPU.

/me wonders what cron job could require second precision, though. ;)

Hmm what job?
Well, i'm a developer of Web-Based MMO, and some operation (as Battle calculations etc.), which calculating them by users interaction would take too much time.

Cron is not intended for high-accuracy timing. It CAN be and is frequently off by several seconds (due to process start-up, etc.). If you need that kind of precision, I suggest running a daemon of your own to avoid process start-up overhead.

How to do such thing?
Coz I think i like it ;)

I mean, i know I have to write it by my own (well, as for now - i'm onyl learning C++, so it could be kind of hard :P), but may be there are on internet some examples?

Write a daemon (basically any continuously-running application) that handles the updates you need.

http://www.google.com/search?q=daemo...ient=firefox-a

Well, so that is the continously handler ^^