Solved!
Go to SolutionHow to migrate a filesystem shared by two cifs servers using VDM.
Guys,
I am planning to use VDM to migrate the CIFS server from one Celerra to another in the same domain. The problem though is that VDM migration requires Filesystem to be migrated with the CIFS server and we have some filesystems that are shared by multiple CIFS servers. If i migrate this filesystem along with one of the CIFS servers using VDM, other CIFS servers will lose access to this filesystem after cutover because it will become read-only at source after cut-over. How do i workaround this?.
Is it possible to do the following:
After the VDM cutover is complete, the destination filesystem becomes read/write and the source filesystem will still be there in the source celerra as read-only. Can i make it read/write, so that the CIFS servers that are not migrated from the source can still access the filesystem at source?.
Thanks all.
Sandip,
Thanks for your response. Much appreciated. All cifs servers are currently on physical DM .I had a couple of more questions:
1) What would be the backout plan when using VDM migration?. I mean to bring the cifs server back online at the source, what would be the procedure?
2) What is the difference between a failover and a switchover in Celerra Replicator?. Which one is recommended?
Hello Sandip,
I need your help. We dont have any VDMs configured yet. All FS and CIFS servers are at physical DM. As far as i understand, i will have to configure the FS and CIFS server on a VDM before i initiate a replication. Please answer following questions:
1) If i move the CIFS server from physical DM to VDM, will it copy the local groups?.
2) If i move the FS from physical DM to VDM, do i need to recreate new shares at the source, or can i reconfigure the existing shares.
3) We have hundreds of local groups on the CIFS server and so i was thinking of using VDM to replicate the CIFS server. If i decide to migrate the CIFS servers using VDM and the FS without using VDM, how should i go about it?. Can i move the CIFS server from physical DM to VDM at source, then migrate the CIFS server using VDM to destination, then move the CIFS server back to physical DM at destination. Will it work?.
4) Other plan is to keep the FS and CIFS server at physical DM and not use any VDM,but after i copy the FS to destination, how do i copy the shares using sharedup and the local groups using lgdup and bring the CIFS server up at the destination?
If anybody else has been through this, please be kind enough to assist.
Thanks a ton.
Rainer_EMC
6 Operator
•
8645 Posts
1620
0
Posted August 16th, 2010 03:00
in order to just replicate the file system data you dont necessarily have to use VDMs
VDMs just replicate the CIFS server config as well so that you can do an easy failover
1) yes - but I think the procedure isnt public so you need to work with EMC support
2) no - not when you properly move the CIFS server
3) if you are going to move the CIFS server to a VDM then you need to move the file system there as well
if the CIFS server is in a replicated VDM the localgroups get replicated automatically as part of the config
4) exactly like you would with any other migration, create CIFS server, sharedup, lgdup, .....
If you go that route I would suggest you create a test CIFS server and file system to make sure you have the necessary steps and order
to see which config data gets replicated with the VDM take a look at the VDM manual
Rainer
Rainer_EMC
6 Operator
•
8645 Posts
916
0
Posted August 16th, 2010 03:00
to be clear - a CIFS server in a VDM can ONLY access the file systems that are mounted on that VDM
if you have to have access from multiple CIFS servers to data in one VDM then these all have to be located in that VDM
otherwise you would need to split the file system - i.e. migrate some parts out to another fs
please see the VDM manual for concepts
Rainer
Rainer,
Thanks for the replies. Can you tell me what is the proper way to move a FS from physical DM to VDM such that shares will not need to be recreated/reconfigured?. I really need urgent help with this.
I need the CIFS server and the shares to come back up online at the source after i move the FS and CIFS server to the VDM.
Thanks
Rainer_EMC
6 Operator
•
8645 Posts
1620
0
Posted August 16th, 2010 07:00
AFAIK the procedure for moving a CIFS server from a physical data mover to a VDM is not public so you need to open a service request
Rainer
For such migration operation on Celerra box, you need to contact with the service manager in charge of your account to get professional service involved.
Open a service request to technical support does not really help as the main function of technical support is provide broken/fix service.
In your case, the field activity is demanded.
If you have problem to get anyone from EMC, of course you can open a service request to query some assistance from support to help you engage some resources.
nandas
6 Operator
•
1473 Posts
1620
0
Posted August 9th, 2010 14:00
Are these CIFS servers already configured on VDM? If so the file systems must also be mounted on the VDM. I am not sure what is the current configuration and how are you planning to use VDM.
If you don't have any VDM now, you can not simply create a VDM to perform CIFS servers migration - rather you need to configure the CIFS servers and the file systems on the VDM first.
If you are planning to do so, you may create only one VDM and configure both CIFS servers on the same VDM along with the file system - then you may use Celerra replication to replicate the VDM and the file system.
Anyway, another option may be separate the file system to make a new file system and copy the data for one CIFS servers to the new File system first.
Also, to your query, once you have moved one cifs server and the source file system to the new Celerra, the source file system becomes read only - but if you completely destroy the File system replication - then you can use the source file system as a separate file system with Read Write access.
I suggest, you consult your local EMC NAS person before making any decision and plan
Thanks,
Sandip