exporting kernel parameter from 4.0F to 5.1A

[nasimuddin ansari]

Dear All
I have to export kernel parameter from 4.0F to 5.1A.

- How can I save boot time kernel parameters of all the kernel sybset into a text file, so that these can be imported on tru64 ver 5.1A?
- some of the parameter spell changed e.f Shm-max to Shm_max. Will it will be tacken care by system during import?

[Michael Schulte zur Sur]

Hi,

I don't think this is such a good idea because you don't know how the default values have changed and some parameters are also obsoleted during the change. I would make a printout of the parameter and add those you need to /etc/sysconfigtab

greetings,

Michael

[nasimuddin ansari]

OK I'll follow the same procedure. I'll take the printout of kernel paramenet and change it in new installation.

[Han Pilmeyer]

Safest thing to do is to run a sys_check and to save its output (html) file. That contains all the important configurations details.

Or you can give a command similar to this to do what you asked for:

sysconfig -s | awk -F: '{print $1}' | \
xargs -n 1 sysconfig -q

However I completely agree with Michael that it is not a good idea to just use (all of) your V4 kernel parameter settings on your V5 system. The meaning and implementation of several parameters has changed. I would try to tune as little as possible and only tune those things that your application requires (e.g. the ipc and proc settings).

[Ivan Ferreira]

You can check the /etc/sysconfigtab on both servers.

Then, use sysconfigdb to modify the sysconfigtab as needed.

You should use the sysconfig -q subsystem to check if the parameter still exists, some where removed.

Also, i agree that you should change only the needed parameters, and recheck it.

May change based on the hardware, software version or patch kit level.

[nasimuddin ansari]

I understand that only the parameter required on new kernel should be changed