Configuring cluster for future nodes

[Stuart Powell]

We are looking at migrating our cluster servers from two L2000's to two RP3440's. I'm not sure when the RP's will be on site, so I was wondering if anyone had added two phantom servers to their cluster ascii file and run the cluster like that; then added the other nodes to the cluster at a later date.
I don't think cmapplyconf will allow it by default, but is there a way around it?

Stuart

[Ashwani Kashyap]

I don't think so that cmapplyconf will allow this since it does query all the nodes , so it will fail .

But however you can prepare all your ascii files ahead of time and when your two nodes arrive , you can apply them .

[Sridhar Bhaskarla]

Hi Stuart,

Nop. When you do cmapplyconf it will check to make sure that all the nodes and their network/storage configurations are good.

So, for your question, the answer is no. It is not too difficult to add the systems into the cluster though.

-Sri

[melvyn burnard]

you will not be able to add non-existant nodes into the clsuter, but you might consider these points.
A 2 node cluster needs a lock disk, or a quorum server.
aa 4 node cluster can use both, but more than four nodes cannot use a cluster lock disc, only a quorum server. You might want t o change to a Qurom Server (frreeeee product ) rather than a cluster lock disk.
If using shared SCSI storage, you need to plan for the SCSI id,s

Network planning is always a goood thing to prepare for, get your hostnames and ip addresses ready, and have DNS set up for these.

just a few thoughts

[Stuart Powell]

Melvyn,
I'm not planning on leaving all four nodes in the cluster. The two current nodes will be shutdown and removed from service.

Thanks to all for help confirming that the solution I proposed would not work.

Stuart

[Geoff Wild]

Stuart,

As others have stated - you will have to wait to configure the new cluster binary.

You could manually prepare your ascii files.

I went through the same thing a year and a half a go - added 2 RP7410's into a 4 node cluster - making 6 in total, then dropping the 4 old ones and adding a cluster lock to the 2 new ones.

Make sure you are at 11.13 or higher of MC/SG....


Rgds...Geoff