On Tue, Aug 22, 2000 at 04:18:56PM -0500, Jay Orr wrote:
Now, I don't claim to have all the ins-and-outs down on NDMP, but here's what I understand. NDMP does a sorta flow-control in one stream and dumps in another (or something like that).
That is the gist of it.
- Do all implementations of NDMP backup/restore at best only allow
choosing directories and NOT files for restore/backup?
I'm not sure of your question here. Any implementation of NDMP should not care whether you are performing a backup/restore on a volume, a qtree, a path, or a file.
- Does netapp's Dump work such that you can choose to backup/restore
particular files?
Again, the NDMP client should not care what your backup/restore unit is and NDMP supports per volume, qtree, path/directory, or file.
- How does netapp's Dump differ from the dump in the NDMP?
It doesn't. Running "dump" or "restore" from the NetApp's command-line is exactly what NDMP does.
It's all kinda fuzzy for me....
Think of NDMP as a network pipe that is designed with:
1) Control sessions for pointing backups to local tape or remote tape 2) Optimization for bulk file transfers
Other than that, it pretty just runs dump/restore from the filer's console. The beauty of it is that you get NetApp native dump format, but managed by your choice of backup software. Not only that, they are fairly independant of one another in that upgrading BudTool/Net Backup or ONTAP shouldn't break backups -- unless NDMP code has been changed in either. =)
When you said you are using "NetApp dump" from BudTool, do you mean the backup class labeld "NetApp dump"? If so, that is NDMP last I checked. To backup a filer with BudTool but without NDMP, you usually have to NFS mount the filer on the BudTool host and use the regular backup class.
-- Jeff
-- ---------------------------------------------------------------------------- Jeff Krueger E-Mail: jeff@qualcomm.com Senior Engineer Phone: 858-651-6709 NetApp Filers / UNIX Infrastructure Fax: 858-651-6627 QUALCOMM, Inc. IT Engineering Web: www.qualcomm.com