Rebalance the workload on all Datamovers with in a VNX

Question

Hi ,

I need to spread the workload across all the available Data mover's on the VNX. I would like to replicate few VDM's along with their File systems to another DM on the Same VNX.

My Question is, the Filesystems are on the same VNX and Same Pool , how the actaul data copy takes place.

I have done migrations between the VNX's using V2 replicator. But not on the Same VNX.

Please let me know.

Rainer_EMC · Answer

Hi, there is no need to replicate - you can just umount the file systems and VDM on the 'old' data mover and mount them on the 'new' data mover. Rainer

vasutativaka09 · Answer

Thanks Rainer!! How do you Umount a VDM on a PDM ? why do we have to umount the FS from the VDM ? they will be on the same VDM even after the migration.

maniemc · Answer

refer the manuals for Virtual Data Movers or "man nas_server" or even just "nas_server -help" for quick syntax help

Example syntax:

To unload vdm from DM server_2 to mount on server_3:

1) Unmount all the file systems from the VDM (Checkpoints first if exist and If in replication, the session must be stopped as well) via server_umount vdm -p FS_Name

2) Unload the VDM from server_2 via nas_server -vdm VDM_Name -setstate permunloaded

3) Load the VDM on server_3 via nas_server -vdm VDM_Name -setstate loaded -mover server_3

4) Remount the FS/Ckpts via server_mount vdm / (restart replication if stopped)

Another consideration is to recreate the interface (with same interface name, IP can be anything) on server_3 prior to this.

Rainer_EMC · Answer

if you are doing this I would strongly recommend to read at least the concepts section of the manuals mentioned to get to know the system architecture

If you are unsure I would suggest to try on a test VDM or to engage professional service for help

VNX

Rebalance the workload on all Datamovers with in a VNX

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