topic Re: Regarding configuring package dependency in Operating System - HP-UX

Regarding configuring package dependency

Kavita Poonia — Tue, 30 Mar 2010 21:46:42 GMT

Hello Techies,

We have a two node cluster with few packages running on one node & few on another node. Now we need to configure a particular order in which these packages should start on one of the node. As we have total 4 packages on one node and three of them are dependent on forth package, so we need to start that forth package first of all as rest of packages are dependent on it. So please lemme know how to configure such dependency.

Thanks & regards,
Kavita

Re: Regarding configuring package dependency

SoorajCleris — Wed, 31 Mar 2010 04:57:01 GMT

Hi Kavita,

It is done in packave control file.
There is portion for package dependencies.

This document is a perfect one
docs.hp.com/en/15673/Understanding-Package-Dependencies.pdf

please check.

Regards,
Sooraj

Re: Regarding configuring package dependency

Rita C Workman — Wed, 31 Mar 2010 14:06:15 GMT

A quick and simple thing you can do:

At the very start of your package.cntl file....put a simple 'sleep xx' command in the packages you want to ensure don't get going before pkg#4.

Another thing you can do is put in a step again at the beginning of the other pkg.cntl file that says to check if pkg#4 is up and running. If pkg#4 is up and running then start this other package.
A statement like:
cmviewcl -l package | grep pkg#4 | grep "running" | awk '{ print $3 }'

will give you output (running) if pkg is running or nothing if it's not. So you could create a quick script to compare if true (i.e. running) and then kick off the other pkgs. Or if not true, tell the other package to sleep 10 seconds to try again, until it finally is true and then the other package can start up.

This is a totally quickie suggestion, but hope it gives you some food for thought.

Regards,
Rita

Re: Regarding configuring package dependency

Kavita Poonia — Wed, 31 Mar 2010 21:09:36 GMT

Awesome Rita !!! Thanks a lot for your valuable suggestion. I was exactly thinking of this but was not getting a way to start.

Thanks again !!!!

Kavita

Re: Regarding configuring package dependency

Kavita Poonia — Wed, 31 Mar 2010 21:39:21 GMT

Thanks to Suraj too for that informative doc.