topic Re: Active/Active Cluster configuration in Operating System - HP-UX

Active/Active Cluster configuration

Vishu — Wed, 22 Jul 2009 22:32:11 GMT

Hi Guys,

Please provide the detailed procedure to configure the Active/Active MC-SG cluster in 2-node environment.

I have done Active/passive configuration before..is it different from that in configuration. Please tell the main difference also in configuration between them.

Thanks

Re: Active/Active Cluster configuration

Steven E. Protter — Wed, 22 Jul 2009 22:50:12 GMT

Shalom,

1) You need an application that supports active-active. You can not do this with Oracle Server, it will corrupt the data. You can with Oracle RAC

2) vgchange -a e becomes vgchange -a s
Activate the shared storage in shared mode so both nodes can read and write to it.

3) You don't have a floating ip address, you can use the IP addresses of the system and even load balance.

SEP

Re: Active/Active Cluster configuration

Vishu — Wed, 22 Jul 2009 23:34:29 GMT

Thanks SEP!!! you always comes up with immediate reply. But if you give me a bit detailed procedure, it would be highly appreciable.

thanks

Re: Active/Active Cluster configuration

Roopesh Francis_1 — Thu, 23 Jul 2009 02:52:00 GMT

Ranju,

Please check below link.
http://docs.hp.com/en/T1859-90048/T1859-90048.pdf

Thanks

Re: Active/Active Cluster configuration

Duncan Edmonstone — Thu, 23 Jul 2009 05:31:56 GMT

As is common these days, you seem to want to rush on and do something without actually taking the time to understand what you are doing...

Your request is meaningless without some sort of context - kind of like saying "please tell me how to build a building" - are you talking about a lean-to shack or a 50 storey skyscraper...

The first point to clear up is what you mean by "active-active". Unfortuuntaely thanks to Microsoft attempting to change the meaning of the term it can now either mean:

- A Cluster in which a single application concurtrently accesses one set of data from multiple nodes (like Oracle RAC) - this is what SEP was referring to.

-or-

- (The Mircrosoft interperetation of active-atcive) A cluster in which both nodes host seperate applications accessing seperate data with the capability to fail over to each other.

So the first question is "what type of cluster do you mean?"?
The second question is what sort of application do you want to run in it?

Without an application and packages, the difference in Serviceguard between active-passive and active-active is zero.

HTH

Duncan

Re: Active/Active Cluster configuration

Fayez — Thu, 23 Jul 2009 05:59:59 GMT

Hi all,

I agree with Duncan, you have to read, then read, and read again, until you get the full picture and start planing your work.

And thanks again to microsoft turning all terms up side down.

Re: Active/Active Cluster configuration

Vinod Kumar Yadav — Thu, 23 Jul 2009 14:40:32 GMT

Hi Ranju,

For Active/Active HP-UX MCSG Cluster Node Configuration that is fully depends on the customer requriment.

As you know the Active/Active Cluster is used for Applicatio Environment.

And in the Oracle Databse Environment you can use with Oracle RAC(Real Application Cluster.

Active/Active Cluster used maxium in the Core Banking Environment.

At the time Active/Active Cluster Installation those VG u requried to be Active in second cluster node.

Use the following commands to setup VG on another cluster node.

# vgexport -s -p -m /tmp/vgtu1.map /dev/vgtu1

Copy the map file to second cluster node.

# rcp /tmp/vgtu1.map tcidb02:/tmp/vgtu1.map

Import the VG using the map on second cluster node.

# vgimport -s -m /tmp/vgtu1.map /dev/vgtu1

Then after done every thing the VG active in the shared mode for which active/active cluster.

Activate the shared VG in the shared mode then the both node can read write.

Use to active the VG in the pkg cntl file in place of vgchange -a e vgname to vgchange -a s vgname

# vgchange -a e vgname

# vgchange -a s vgname

Thanks
Vinod Kumar Yadav

Re: Active/Active Cluster configuration

Steven E. Protter — Thu, 23 Jul 2009 14:57:10 GMT

Shalom,

Requested information. An HP document.

http://docs.hp.com/en/T1859-90017/T1859-90017.pdf

SEP