One thing NDMP does do is the "control session" lets you keep file history on the backups you perform, allowing you to search for the file you need when doing a restore, instead of rgoing thru each tape. If all you do is stream the dump to tape, you don't keep a file history.
Moshe
Jay Orr wrote:
- 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.
Well, not 100% - see Stephen Manley's posting. In talking to vendors I see I'm not the only one confused about what exactly NDMP does and doesn't do.
When you said you are using "NetApp dump" from BudTool, do you mean the backup class labeled "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.
No, they have had a format called FAServer (they talked about depreciating it, but it's still there) which calls dump from the filer and streams it over. You can actually script and pipe a filer "dump" and not use NDMP (i.e. on the filer you can leave ndmpd="off"). We weren't paying for NDMP support on budtool nor did we use it.
The thing is we have two F330's with only ~30-40 Gig on it, so it seems overkill to pay as much as $2,000 each over and above the cost of some backup software for NDMP backups on them, but because we run ClearCase off of them we need to snapshot our dumps from them (which netapp's dump does do). Unfortunately most vendors only offer either NDMP or NFS backups of filers.
I'm just trying to make sure I know what I'm asking for, and then find a vendor that won't gouge me for having some Netapp filers. These days backups are no longer a "simple" thing to deal with. But I digress..
Anyway, thanks for the reply! I really appreciate the helpful and knowledgeable people of the Toaster's list.
Jay Orr Systems Administrator Fujitsu Nexion Inc. St. Louis, MO
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