On May 4, 2005, at 12:43 PM, James Melin wrote:
Ultimately I am thinking weekly full volume backups via CDL (so I get such things as the cyl-0, the IPL records, etc) and daily incrementals via either bacula or the NFS option. What is the best way to copy only changed files?
Set up your backup definitions so you only ever do incrementals.
If you really really want minimal-size, and only want to take the deltas to the files that have changed, rather than the changed files themselves, you probably want to look at rolling your own rsync-based solution, or poking through sourceforge and seeing what's out there. I know people who do this successfully, although I prefer a more traditional backup solution, like Bacula.
Right now I don't have VM ownership of those two tape devices, and I'm not sure that I can sell that to anyone. Don't really have a direct means of having VM tell z/OS in another LPAR that it is time to give it the tape drives for a while.
The other question is this... if I go the NFS option, which is the most likely, will rsync work for me, or will it be a problem.
Should work fine.
Ultimately I'd want to do NFS backup target datasets as a GDG so I could go back to previous versions if I had to. We are not using NFS on z/OS as there has been no call for it locally. Can you NFS export the +0 GDG? I don't know if thats practical or not. Also, there is the issue that if I use NFS, and immediately migrate the dataset by management class, when it comes time for backup, does it cause the previously migrated version of the dataset to be recalled, then backup proceeds and then re-migration happens? (presuming non-GDG)
Maybe David can answer this; my knowledge of z/OS NFS is confined, mostly, to what it looks like from the Linux side of things when you mount it.
Adam
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