topic Re: Data replication from one array to another in Operating System - HP-UX

Data replication from one array to another

Mahesh Babbar — Wed, 15 Aug 2007 22:49:26 GMT

Hello All,

I have a scenario, where I want to replicate data from one server connected to EMC array to another server on XP array, WITHOUT DOWN TIME.
Previously I had used LVM to migration, but replication is new to me.
Since the data size is huge, 2+ TB, backup and restore doesn't gives a fast solution.

Is there something in LVM I can use, or any other way to replication the environment.

regards

DT

Re: Data replication from one array to another

Sandy Chen — Wed, 15 Aug 2007 23:33:28 GMT

Hi,

I think LVM will no do any help for you. I've used this software called Softek TDMF, migrated 20 TB of data (from several servers), either to another server and storage or to the same server with different storage array.

And no downtime is most likely not possible, but a minimized downtime can be achieved, max 1 hour per server.

regards,
Sandy

Re: Data replication from one array to another

Tim Nelson — Thu, 16 Aug 2007 11:25:16 GMT

Without getting into purchasing cross vendor replication software LVM mirroring may be the way to go. Is there some reason you do not wish to use this option ? There will certainly be IO issues during the mirroring unless you have segregated FC HBAs but depending on your config you may be able to use some phased approach.

Re: Data replication from one array to another

Mahesh Babbar — Thu, 16 Aug 2007 23:43:14 GMT

Hello

I am keen for performing the required operation, I am ready to think beyond LVM too.

I have done migration using LVM (pvmove), but not replication. can you please help me on how to replicate environment from one array to another using LVM.

regards
DT

Re: Data replication from one array to another

Christian Tremblay — Fri, 17 Aug 2007 10:33:48 GMT

It should be easily done using Mirrordisk.

Basically, you create LUNs on the new array that are the same size or bigger than your existing LUNS on your source array.

You then add your new LUNs to every volume group on your system and mirror all your logical volumes to the new LUNs.

Once this is completed, you will have a live mirror copy of your data on each array.

You then break the mirrors by lvreducing out the copy on you source array and you are done.

Chris