topic Re: BOOT in Operating System - HP-UX

BOOT

André Marcelo Dias — Fri, 27 Apr 2001 11:52:37 GMT

Gentlemen, Would like to know on the recommendation to give to a BOOT
to each month in server HP-UX version 10.20, therefore the same and
used very, if he is viable or not.

Re: BOOT

Stefan Farrelly — Fri, 27 Apr 2001 12:00:43 GMT

Im not quite sure I undertsand your question fully, but if youre asking if you should reboot your server every month my opinion is normally no. By itself HP-UX (10+11) are very very stable (as long as you keep the patch levels uptodate). I know of some HP server which have been up for 3 years without a reboot (ok, thats an extreme). It all depends on the applications you are running, if they have a memory leak or not. If over time your memory usage goes down and down, even though you are restarting your application, and you cannot configure/fix the aplication to stop the leak then you have no choice but to reboot frequently. But I would evdeavour to find the source of the leak and fix it than resort to regular reboots.

Re: BOOT

Bill McNAMARA_1 — Fri, 27 Apr 2001 12:34:45 GMT

Well, there is a leak in the ksh!

There is no real reason why you should reboot a server because most maintenance can be done online. You can temporily stop and start services from within /sbin/init.d/ rather than restarting everything on reboot.

One good reason to reboot would be on patch installation that requires a new kernel to be built. You must boot off the new kernel for the changes to be applied.
This however, is scheduled maintenance..

Other reasons to reboot would be for changing scsi cabling.. it is prefered to shutdown the host and the devices because of the fact it is an electrical bus. Fibre Channel isn't restricted to this limitation.

I really only reboot my servers when every one is on Christmas holidays... I apply patches then too. Rebooting regularly will cause no problem once you're software is stable and the services your system provides can cope with system downtime. If your services can't cope with downtime you need serviceguard to have a multi computer cluster environment.

PS there is a language translator on babelfish.altavista.com !!

Later,
Bill

Re: BOOT

f. halili — Fri, 27 Apr 2001 12:52:21 GMT

You can have regular scheduled reboots. This will lessen your worry if you will reboot your system in case of emergency or changes in the hardware.:-)

- fnhalili

Re: BOOT

A. Clay Stephenson — Fri, 27 Apr 2001 13:16:56 GMT

If I understand your question then my suggestion is no - do not reboot monthly as long as there are no application problems (memory leaks, unhangable ports, etc.).
All of my servers stay up at least for months
at a time and then only for scheduled maintenance. Remember the greatest stress an electrical component (other than overheating)
occurs during startup.

Re: BOOT

Ajitkumar Rane — Fri, 27 Apr 2001 13:26:52 GMT

Rebooting a server is normally not required unless and until you really have a problem you cant get out without reboot.The normal reboots should be during patch installs, upgrades etc.