4 replies to this topic

[nfnovice]

On one of the xml EPG grabber sites I use they have suggested that we randomise our cron times so as to spread load on their FTP server - OK I will try - but I cant find the equivalent random variable on my 7000

here is their suggested code to make the thing run any time between 1am and 6am

0 1 * * * sleep $((RANDOM % 18000)) && your command here

any thoughts on the equivalent or whether this is possible in a 7000 or 7020 ?

[swq]

you can tryto insert RANDOM time in your script

ex:

crond:

0 1 * * * your command here(script)

script:

random time 
sleep random time 

....... 
your command 

now,when the crond start on 1am, it will exectue the script. it will sleep random time first !

[nfnovice]

you can tryto insert RANDOM time in your script

yeah thanks mate - good suggestion but no kewpie doll
the problem is that random isnt included in the shell on either the cdk or the OE boxes
if it could work within a script as you suggest - it would work from from within crontab
what you get is

root@dm7020 ~ # random time
-sh: random: not found
root@dm7020 ~ #

cheers

[swq]

example:


#!/bin/bash
rnumber=$((RANDOM%30000+18000))
echo $rnumber
sleep $rnumber
.......
your command


it's script for radnom number between 18000-48000,you can modfily the red number for yourself.
hope it will helpful to you!

regards

[nfnovice]

I understand how random works in a *nix environment
it just seems that access to random is not available in the DM - either from command line or script
- (although I see /dev/random and /dev/urandom do exist)