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NAS linking NAS shares
The team who manage our VNX have imposed a limit on NAS shares of 2TB. This limit has been set as they believe that the NDMP backups complete faster when the share sizes are kept to a managable size.
This imposed limit causes operational issues - 2TB shares aren't large enough for some of the data sets we are looking to serve. For this reason we end up with a load of shares for the same pupose.
e.g. Finance_Reporting_1
Finance_Reporting_2
etc.
From an end user perspective, this is overly complex.
Is it possible to create symbolic links to provide a more logical share presentation? Does limiting shares to 2TB really make such a big difference for backup and recovery times?
Thanks in advance!
dynamox
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May 27th, 2015 03:00
with a limited number of NDMP streams (4 on smaller/older models, 8 on bigger/newer) it is a valid concern. There are only so many hours in a day to send the data to tape. Products like Avamar NDMP accelerator help with that buy taking advantage of Avamar "synthetic full" functionality where traditional backup products still have to at some point run a full backup.
cadencep45
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May 27th, 2015 06:00
using a DFS tree will hide the physical constraints of size from user and present them as a single directory structure. The only caveat I can think of in relation to this is if you are using multiprotocol, ie NFS as well its not a completely clean solution.
a8ree
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May 28th, 2015 03:00
Thanks for the guidance. Unfortunately we don't have a dedup device to use for backups and DFS is currently not in the plan....
I found this doc
http://www.contourds.com/uploads/file/configuring%20and%20managing%20cifs%20on%20emc%20celerra.pdf
On page 111 it explains the process of creating symbolic links. I presume that I could use this to create links between shares?
Rainer_EMC
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May 28th, 2015 07:00
You can use a standalone DFS root on the VNX/Celerra
Its more transparent for CIFS clients than symbolic links