I am investigating using either NSS snapshots or mirroring against clustered
GroupWise and file & print volumes as a means of backing up during working

My concern with NSS Snapshots on a clustered volumes is the data needs to
reside on the same NSS Pool and thus disks as the online volume therefore
backing up during the day may affect business as usual performance on our

My other concern is obviously NSS mirroring requires double the space on our

I'd appreciate any thoughts in this area:

1. Are there any metrics on the size of a snapshot GroupWise volume so I can
get an idea of the performance cost of backing up during the day?

2. Can a mirrored NSS volume be backed up whilst it's mirror is still live,
or would I encounter file-lock issues?