topic Re: ms service guard in Operating System - HP-UX

ms service guard

Tvs — Fri, 09 Sep 2005 03:30:11 GMT

In a MC service guard i am having 2 nodes and pkga is running in node1. i just want to switch the package pkga to node2 without halting the package

if iam running chmod -e pka1 -n node2 whether it will halt the package and then it will start the pacakge in node2

i want to avoid the halting of packages

pls help me

Re: ms service guard

Devender Khatana — Fri, 09 Sep 2005 03:34:37 GMT

Hi,

It is not possible. For a package to be switch to second node it should be halted on the first node.

Morover there is no chmod command in service guard. The chmod is standard OS command used for changing file perms.

I think you mean to say cmmodpkg. This infact enables global switching of package on other node. i.e. if package fails it will be shifted to second node.

This command infact will not switch the package but will enable switching in case the package fails.

HTH,
Devender

Re: ms service guard

Torsten. — Fri, 09 Sep 2005 03:45:43 GMT

Hi,

the only way to switch a package is to stop it on one node and start it on the other node. It's not (yet?) possible to do this without interruption.

T.

Re: ms service guard

Simon Hargrave — Fri, 09 Sep 2005 03:49:35 GMT

You must understand that ServiceGuard is a "failover" cluster package meaning that packages can only run on one node at a time. It therefore MUST close the package on one node before running on another. The idea is that it does this when the node fails, therefore you have an outage anyway.

To fail it over manually you will have an outage - how long will depend on how quick your failover scripts are, but I certainly would NOT run the failover to another node until a scheduled quiet time when your users have been warned of a small outage.

Re: ms service guard

Raj D. — Fri, 09 Sep 2005 03:59:55 GMT

Hi Tvs ,

It is not possible to switch the running packege to the other node , but if the node , node1 fails on , package will switch to the failover node.

And chmod is a os command, for changing permission , hope you tried to say chmodpkg to change the Global switching attribute.

To move the package to the other node , that is node2 , you have to do like following:

# cmhaltpkg -n node1 -v pkga [ Will halt the package on node1 ]

# cmrunpkg -n node1 -v pkga
[ This will run the package on node2 ]

# cmviewcl [ to check ]

Cheers,
Raj.

Re: ms service guard

Tvs — Fri, 09 Sep 2005 04:05:42 GMT

sorry to all

i mean to say chmodpkg

Re: ms service guard

Tvs — Fri, 09 Sep 2005 04:07:19 GMT

Thanks to all

Re: ms service guard

Raj D. — Fri, 09 Sep 2005 04:10:17 GMT

Sorry Tvs, even I did a mistake , its not chmodpkg , but its cmmodpkg.

And it resideds in /usr/sbin/

cmmodpkg - enables or disables the switching attributes for a package.

cheers ,
Raj.