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May 31st, 2012 22:00

Celerra DR test Procedure

We are planning to a conduct DR test on our VDM CIFS environment. Let me explain our current setup. We have NS-120 with 1 VDM and 15 File systems mounted on that. We have configured replication for this filer to a remote location. Now we need to conduct a DR test for this file systems as requested by business. So my question is do i need to create any CIFS server on destination side or whether CIFS server will automatically create when I loaded and mounted the destination VDM. Also how about shares? Do we need to manually create shares on destination side?  what is the process and procedure of performing the testing without impacting the production access?

254 Posts

June 4th, 2012 07:00

As long as you are replicating at the VDM level and not the filesystem level, your servers and shares should move over with the replication.  If you only replicated the filesystems and not the VDM, you will need to recreate any shares and servers you would need on the destination side.

10 Posts

June 4th, 2012 18:00

Thanks.

We are replicating VDM aswell.

what need to be done if I wanted to conduct a DR test only for a single file system under a VDM without interrupting other file systems operations on production side if the VDM replication is already in place.

June 4th, 2012 22:00

While managed via Replicator, it is all-or-none in regards to the VDM and the filesystems, CIFS server, and shares associated with it.  However, you could consider presenting a checkpoint of the target filesystem and present that via a separate CIFS server (on the physical data mover) as described in the both of the following KB article:

emc216579: "How to conduct an application test on destination side without stopping replication sessions"

emc146081: "Celerra IP Replication: How do I  access through CIFS replicated read-only data at the Disaster Recovery site?"

10 Posts

June 5th, 2012 21:00

Thanks. below is test plan I prepared for our environment for DR testing. Can someone review it and comment

  1. Validate the current replication setting for VDM and filesystem, and do a ping test on the CIFS server.
  2. Stop VDM replication on the PROD side:
    nas_replicate -stop id= -mode both
  3. Stop filesystem replication on the PROD side:

nas_replicate -stop id= -mode both

  1. Set the PROD VDM to mounted state:
    nas_server –vdm –setstate mounted
  2. Set the PROD filesystem to read-only state (to prevent writes during the testing period):
    server_mount –o ro
  3. Set the PROD interface to down state:
    server_ifconfig down
  4. On the DR side, set the COB VDM to loaded state:
    nas_server –vdm –setstate loaded
  5. On the DR side, set the COB filesystem to mounted and read/write:
    server_mount -o rw
  6. On the DR side, set the DR interface to up state:
    server_ifconfig up
  7. Do a ping test of the CIFS server FQDN to ensure that the NAS is back up via the COB interface.
  8. Wintel administrator need to validate that share is accessible.
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