topic Re: make dev kernel same as production kernel? in Operating System - HP-UX

make dev kernel same as production kernel?

justin_83 — Mon, 07 Jul 2003 18:45:10 GMT

I have two N-class boxes running 11.0. They both have the same hardware config and same patch level. How do I take the kernel from the production box and make the development box the same kernel config?
Is it as simple as ftp the /stand/vmunix and reboot?

Re: make dev kernel same as production kernel?

sekar parthasarathy — Mon, 07 Jul 2003 18:52:45 GMT

Hi,

The best way to take output using kmtune
and compare the production with dev use
perl / sh scripts to compare both, and
make changes dev kernel as of production
server.

I will try to send the perl scripts, which
one I used for comparision.

Regards

sekar.

Re: make dev kernel same as production kernel?

William Wong_2 — Mon, 07 Jul 2003 18:58:29 GMT

If they are the same exact hardware and software then you can create a system file from the production system with the
/usr/lbin/sysadm/system_prep -v -s system and
copy that file to your development system and
use mk_kernel to create a new kernel with the
same exact kernel values as your production system and reboot that system.

Re: make dev kernel same as production kernel?

Uday_S_Ankolekar — Mon, 07 Jul 2003 19:02:42 GMT

Best way is to use ignite tape. Create make_tape_recovery from prodcution box and use it on deve box

-USA..

Re: make dev kernel same as production kernel?

Caesar_3 — Mon, 07 Jul 2003 19:07:36 GMT

Hello!

Look on this you will find the answer:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x3d7e3f9a15add711abdc0090277a778c,00.html

Caesar

Re: make dev kernel same as production kernel?

Steven E. Protter — Mon, 07 Jul 2003 19:38:51 GMT

I would not ftp the vmunix file.

Even on identical systems there are differences there.

what /stand/vmunix > /tmp/vmdiff

Do it on both systems and you may find differences.

Certainly the serial number on the machines is different.

What I would do is open sessions on both machines, and go through the kernel parameters one by one and make sure they all match, formulas included.

Then you can generate a kernel with some degree of confidence.

SEP

Re: make dev kernel same as production kernel?

Massimo Bianchi — Tue, 08 Jul 2003 06:04:40 GMT

Hi,
a little trick.

If, besides all other wise suggestion, you do want do make the kernel alike (which i don't suggest, prod server always have different needs), here is a fast way:

rcp PROD:/stand/system PROD:/stand/system.good
rcp PROD:/stand/vmunix PROD:/stand/vmunix.good
rcp DEV:/stand/system PROD:/stand/system

go to PROD server

cd stand
mk_kernel
kmupdate
shutdown -r now

This way we will take with us the kernel parameter.

HTH,
Massimo

Re: make dev kernel same as production kernel?

twang — Tue, 08 Jul 2003 06:22:08 GMT

I do this through manual rebuilding kernel method:
on the prod env:
# cd /stand/build
# /usr/lbin/sysadm/system_prep -s system

# vi system
(make your changes if required on dev env)

save the file and ftp to the dev server,
on dev env:
# mk_kernel -s system
# kmupdate
# cd /
# shutdown -r -y now

Hope this can help!

Re: make dev kernel same as production kernel?

Bruno Vidal — Tue, 08 Jul 2003 06:24:32 GMT

Hi,
Another solution to retrive the configuration file of a kernel is to retrieve it directly from the kernel you want to duplicate itself:
#echo 'system_data?X
.+4
.?s' | adb /stand/vmunix > /tmp/system.orig

Then use this system file to create a new kernel on the other system.

Btw, I don't recommant to ftp the kernel to the other system, because it can need some patched libraries that the other system don't have (example: ps command, ipcs, nfs, etc...)

Cheers.

Re: make dev kernel same as production kernel?

justin_83 — Thu, 10 Jul 2003 16:29:20 GMT

Thank you all for your input... I'm going to go with Twang's suggestion.

Re: make dev kernel same as production kernel?

justin_83 — Thu, 10 Jul 2003 17:17:55 GMT

I also see that Wong had the same suggestion earlier so i adjusted his points....
so you could say i'm going with Twang Wong answer...