Can a SRDF DG have devs replicating using different RDFG's ?

Hi MahendranVijay, welcome to our forums !!
Please spend a few minutes and explore our Coffee Break area and eventually introduce yourself in the "Who I am" thread

If you have 2 hosts, each with its own DG and its own RDFG, I'd suggest that you move the pairs from RDFGX to RDFGY and while deleting/creating pairs you also move the devices from DG-A to DG-B.

If you are running code 5773 or later you can also use the "movepair" feature.

Hi Stefano...many thanks...that answers my questions.......

So unless I have 5773, I need to manually remove devs from DG-A ,deletepair, createpair(using RDFG-Y) and then add to DG-B.

Movepair is really a good one

Thanks again.

I did not expect my questions will be answered so soon...I appreciate.

1) no, I'm simply saying you have to move devices between RDFGs ... thus moving devices from DG-A to DG-B is simply another command you have to issue between deletepair and createpair

2) symrdf movepair will move devices between different RDFGs without requiring a deletepair and a subsequent createpair (with the associated full establish)

3) symrdf movepair requires code 5773. And please always use recent S.E. (7.0 onward)

You can always wait a few more hours.. Right now US is waking up (ahemmm they are already up and awake to be honest) and possibly someone else may give you better/different answers...

I agree, movepair is really useful!

Thanks very much Stefano...yeah lemme check out the coffee break forum...

1. So in essence, do you mean a single DG cannot have devs from different RDFG's ?

2. "movepiar" will move devices between DG's or RDFG's ?

3. which symcli version is having this "movepair" feature ?

I would have to test to confirm, but I believe you CAN have devices from different RDF groups in the same DG. The problem is that in SRDF/A mode (we don't use SRDF/S so I'm not sure about that) having the devices in the same group basically means you can't issue RDF commands against that group. Most (if not all) RDF commands require that you act on an entire RDF Group if it is in Async mode.

Unless this has changed with 5773 and SE 7... the last time I tried this was with 5771 and SE 6.3.x

Curious to know the results ....

Allen is correct. Once you change the RDF group for one of the pairs in your device group, you will not be able to issue an SRDF/A establish, etc. SRDF/A executes on an entire RDF group, for consistency. Having a single pair out of all the pairs in the group not in the same state is not a valid situation.

You do not want to be able to issue an establish on a device group when only a portion of an RDF group is in that device group. That would be a bad thing. The device group is merely a mechanism for issuing a command against a group of devices.

My suggestion is, if your Enginuity code level supports a movepair operation, do that, then remove the pair from the old group, then delete them from the old device group and add them to the new group. If it does not, then perform a delete pair, then createpair, then do your device group manipulation.

By the way, this only applies to SRDF/A. Sync, ACP, semi-sync, all operate on a pair-by-pair basis.

And that's exactly why I'm suggesting what I suggested
Let's use KISS philosophy and move devs between DGs while creating pairs

BTW with SRDF/S you can susp/resume/failover/failback any device in a RDFG, regardless of what you do with other devices. In a single RDFG you can have a few devices failed over to their R2 side, a few other actively pushing data to R2 and another set of devices suspended on the link.

Stefano/Scott/Allen,

Thanks all for your valuable inputs.