HP-UX

hi,
I want to know that "What Happen if the root partition gets full on the server? I have HP-Unix 11.11 installed.

Many things...
It ca crash for a start...

With the root partition full it can be impossible to log in. If you are logged in as root at the time, don't log out.
The continuous error messages output to the system console can make the system console unusable. The error messages to system logs and cstm logs can cause /var to fill.

The rest depends on how your system is configured. As long as you have separate mountpoints for /usr /var /opt /tmp and /home it's often recoverable if you are quick. You must reboot after clearing the problem because the /etc/utmp file is likely to be corrupted and the system will have stopped System Accounting.

To get an idea of what might be affected:

Code:

find // -xdev -mtime -1 -exec ls -ald {} \;

Filling /var can be a lot more difficult to deal with.

Don't ever have entire / on disk, without the separate partitions for /var /tmp etc.

Example of good configuration :

Code:

/dev/vg00/lvol3    1048576  416032  627648   40% /
/dev/vg00/lvol1    1835008  170664 1651432    9% /stand
/dev/vg00/lvol8    17301504 10296080 6962808   60% /var
/dev/vg00/lvol7    7241728 4802312 2420416   66% /usr
/dev/vg00/lvol4    2097152 1584384  509056   76% /tmp
/dev/vg00/lvol6    9928704 8433328 1492712   85% /opt
/dev/vg00/lvol5    1048576  826152  220976   79% /home

This way, you will probably avoid complely crashed system caused by lack of disk space.
Don't chown e.g /oracledatabase to oracle user.
Rather make folder inside and mount your database mountpoints.

This way, if /oracledatabase disk subsystem fails, it can't write to /oracledatabase (since it's owned by root) and fill up / resulting in god knows what.

Hope that helps.
Regards
Peasant.