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Narahari1

2 Intern

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127 Posts

737

June 23rd, 2011 07:00

celerra Pools

We have a NS80 5.6.47 with 2 CX's (340, 380) and we have dedicated pools for the LUNs from each of these clariions. The CX340 box is maxed out on disks and that 340-pool is almost getting full. I know that we can add disks from the 380 box to 340-Pool and expand it. But is that a good practice and is there any performance impact on the filesystems created out of 340-pool? I dont assume since 380 is a high-end model. But would like to know your thoughts.

I could have moved filesystems from CX340 pool to CX380 pool, but it replications to DR box and the filesystems are too big (8TB) and also have stub files and moving that to a different pool is going to be messy and recreating replication to DR to push 8TB again is another pain.

Thanks in advance.

Rainer_EMC

4 Operator

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8.6K Posts

June 24th, 2011 05:00

The best practice is to NOT span file systems across storage systems since this decreases availability

Rainer

Rainer_EMC

4 Operator

 • 

8.6K Posts

June 24th, 2011 06:00

Not sure

I think the latest FMA has the ability to move archives and file systems.

I would suggest to check with your local EMC specialist

Rainer

Narahari1

2 Intern

 • 

127 Posts

June 24th, 2011 06:00

Thanks Rainer.
To move file filesystem between the pools with stubs what is the procedure I can follow?
I can do the local replication and during the cutover time, I can stop, delete replication and unmount original filesystem, rename to fs_original and the replicated filesystem fs_replica1 to fs and mount it on the same mountpoint on the vdm and the shares will comeup fine. But will I be able to read stub files from the new filesystem? I think if I do a local replication, it also copies the fs_dhsm connections and will have all the details (not sure), but I have read some where that there are chances that stub files will be removed on the new filesystem during the stub/orphan cleanup process by DX/Centera. Any ideas?
Thanks in advance.

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