serviceguard with sap extension

[anat heilper]

Hi,I wanted to know what is the difference between a "regular" serviceguard cluster and a serviceguard with SAP extension. will the cmviewcl have different output? does it still use the package control script? ( run/halt)
where are the volume groups of the SAP configured? oin a seperate script, or in a normal package control script?
Thanks,
Anat

[Torsten.]

Here is the documentation:

http://docs.hp.com/en/T2803-90004/index.html

more:

http://docs.hp.com/en/ha.html#Serviceguard%20Extension%20for%20SAP

[Steven E. Protter]

Shalom Anat,

The SAP extension are a series of tools, control scripts and such that save you the time of developing these things yourself.

cmviewcl doesn't look different, no commands are changed, just control scripts and such.

SEP

[anat heilper]

Hi,
I'm interested in how the control scripts are different?

[Duncan Edmonstone]

>> I'm interested in how the control scripts are different?

Well they are customised for SAP.

Whereas when you just have Serviceguard they are effectively empty of any application customisations...

SGeSAP is largely scripts which manage the start/stop of various SAP components - but they are fairly complex, hence the extra cost.

HTH

Duncan

[Tor-Arne Nostdal]

As already mentioned it is basically just an extension so you don't have to do a lot of advanced scripting yourself.

These scripts is probably better than most would create themselves - hence the extra bucks is worth it.

From the package script a separate script which handle the SAP instance is started.

Example SAP SID=PRD
Package also named PRD

Control Script for SAP: /etc/cmcluster/PRD/sapwas.cntl

function customer_defined_run_cmds
{
# ADD customer defined run commands.
test_debug
. /etc/cmcluster/PRD/sapwas.cntl start PRD
}

--- remember the extension is not "just a simple script", so I would definitely say it is worth the extra cost.

Considering the money you spend on SAP (licenses +++) I would say this is not the place to reduce your cost.

/Tor-Arne

[Olivier Masse]

As most people pointed out already, SGeSAP is not an "extension" like a module or an API; it's a complex set of scripts that are tailored to manage a multi-instance environment with remote app servers and so on. They sit on top of standard .cntl's and .conf's, and ServiceGuard sees everything as a usual package... except that the startup and shutdown script is way, way more complex than the average SG package. Last time I used it (2005), you had the possibility of splitting the central instance and database server in two packages, or running both in the same package.

A nice thing is that since it's a set of scripts, it can be modified or extended for your environment if needed.

[anat heilper]

Thanks you all for the information