I'm trying to figure out how to backup the Unity NAS using EMC NetWorker. Although some whitepaper states that NetWorker Snapshot Management may support Unity, I haven't found any clear documentation whether this works and how to set it up.
The idea would be to:
1. create a snapshot
2. backup the snapshot
3. release the snapshot after backup
Since we are backing up against a data domain, I'd expect that to be very efficient since unchanged data shouldn't be saved over and over again.
Any input highly appreciated
thats called NDMP BIS (backup integrated snapshot)
its controlled either via SNAPSURE NDMP environment variable or the ndmp.snapsure param
see the Unity service command manual for details on the param and the svc_nas command
What I'm missing is a documentation which explains the pros and cons of the different options. I have to read thru a plethora of documents without getting any background information. I can make the backup work, but feel uncertain if this is the best option for my company to work!
Could you tell me which documentation you missed? I met the same problem and didn't know how to fix it.
Thanks very much!
For backup of a NAS system you have two options:
1) backup is performed by the NAS system - this is controlled from a backup application via the NDMP protocol
- usually better performance
- backup/restore of multi-protocol attributes - both Windows and Unix owners and attributes like ACL's
- can use special array features like snapshots
- doesnt create network load (in case of 2-way NDMP direct to FC tape)
- licensing cost
- typically only restoreable on the vendors system (each NAS vendor has its own backup format)
2) backup from the client - this is performed from a client/server attached to NAS server using CIFS or NFS
- works with any software that can backup network shares
- usually lower license cost for backup software
- could do application specific backup better
- cross-platform restore
- no multi-protocol - if you backup using CIFS then Unix attributes arent backed up and vice versa
- typically slower than NDMP backup - esp. for lots of small files
- uses LAN and can have more impact on client performance