MC/Service Guard

[marcello_2]

Hi! is there someone that can help me to know how to use and what is mc service guard?
Thank you

[Patrick Wallek]

Just about any documentation you could want is at http://docs.hp.com

MC/Service Guard specific docs is at:
http://docs.hp.com/hpux/ha/index.html#ServiceGuard

[Sanjay Verma]

Marcello, MC Service Guard is a setup through which you can configure failover mechanism in which if one server fails, the other server automatically take over the control of all the applications etc. from the failed server. The applications are moved in form of "packages".

Some of the very important and used concepts are:
Nodes: The servers in the cluster are referred to by Service Guard as "nodes".
Packages: he applications that are under the control of Service Guard are referred to by Service Guard as "packages".

Some of the frequently used commands ar:
# cmviewcl
# cmruncl
# cmhaltpkg etc. etc.

By default, the location of MC/SG install files are: /etc/cmcluster.

Hope this helps.

[Karthik S S]

Service Guard is HPs Cluster software for High availablity (not to be confused with fault tolerant). In a basic setup you will have 2 servers (nodes) with a shared storage running the cluster applications. At any point of time an application will be running on one single node and incase there is a software or hardware failure the other node takes over the application and continues to run it with a minimal downtime and service distruption.

http://docs.hp.com/hpux/ha/index.html#ServiceGuard

-Karthik S S

[marcello_2]

may thanx at all, but Sanjay Verna, can you tell me what these commands do?

[Sanjay Verma]

Marcello,
These commands are used to view/perform different information/actions like:
a) View the package status - which node is running etc. (cmviewcl)
b) Start the package
c) Stop the package
d) Move the package to another node

The most frequent used command is "cmviewcl -v" which gives the status like Cluster, Nodes, Packages, Network Parameters & so on. It's always safe to use this command as a user to get an understanding of what all packages are running & on which nodes.
If you execute this command on both the servers (in the cluster), it'll be easy for you to understand the configuration parameters & the status.

Hope this helps. Cheers.
[You know when I was new to MC/SG, I struggled to find these sort of information and now happy to help you out with my experience only.]

[Ted Buis]

I would strongly recommend taking the HP Education classes or even purchasing consulting. http://www.hp.com/education/courses/h6487s.html
and
http://www.hp.com/education/courses/h4310s.html

[Shaikh Imran]

Hi,
HP MC/SG is the software for High Availability of HP-Unix Systems.It is to make a system available also if there are many hardware and software faults.
It comprises of Clustering of 2 or more servers together so that if one fails the other take over.
You can refer to
http://docs.hp.com/hpux/ha/index.html#ServiceGuard
For more information.

Regards

[Karthik S S]

Geoff is more than willing to help you :-),

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=494369

-KarthiK S S