prevent file size is too large

[peterchu]

We have EDP members will do some testing job in my system , but sometimes these process will generate some error to the system log or any file ( usually the members don't know the log is reached to this level ) , then make the system crashed , could suggest the way how can to prevent this problem ? eg. restrict the file size . thx

[Paul_481 · Accepted solution]

Hi Peter,

You can set the filesystem options to nolargefiles if your problem is largefiles. If you have OnlineJFS you can do this online.

#fsadm -F vxfs -o largefiles /

Hope that helps.

Regards,
Paul

[peterchu]

thx reply ,

if I am not mis-understand your solution , the system can't generate any file to a limited size ( eg. 2G ) , but i don't want that , I just want to restrict some specifc file size not all files , can I do that ? thx

[Paul_481]

Hi peter,

If the logs generated is not important you can try to cron a script that deletes the files.

cat /dev/null > logfile

or you can cron a script that rename/move the file to another filesystem.

mv logfile /newdir/logfile.old

Regards,
Paul

[peterchu]

thx reply again , the log is important,
but my problem is the log size is increased when the user is testing something , so the log will be increased very fast , I want to limit the size to prevent the system crash suddenly when the log size become too large ( when we are unatteded ) .
thx

[Paul_481]

Hi Peter,

What filesystem is the log located? is it in the / filesystem?

I am running out of suggestions, I hope the guru's have better idea.

Regards,
Paul

[peterchu]

thx Paul C. Castillo , help ,

the size will be increased until system full within 1 hour (some testing program will generate unlimited files to the system), so I think I can't move it or delete it before system is crashed . thx

[Keith Bryson]

Hi Peterchu

Your best bet would be to run an occassional cron script that would mv and gzip the file (an ascii log should zip-up to small size). Then re-touch the logfile. A ksh example follows:

#!/bin/ksh
DATE=`date +%m%d%H%M`
mv /location/mylogfile /location/mylogfile.$DATE
touch /location/mylogfile
gzip /location/mylogfile.$DATE

Keith

[Andrew Fong]

I am just wondering if disk quota can help you. man quota and edquota.

Regards
Andrew