Well that doesn't bode well for Tivoli's plans for future NDMP functionality =)
Other then the obvious advantage of sending the data directly to tape vs across a network (twice since it's nfs mounted), are there any advantages to using the TDP for NDMP? I mean if it's an "image" backup essentially, aren't you backing up the entire thing each time? At least via NFS you'd only grab the files changed (and thus be able to restore only single files and achieve a greater degree of granularity). On the other hand with the amount of storage that fits on an NFS server, simply scanning and backing one up is terribly time consuming unless you can break it out to multiple clients somehow. Gerald Wichmann 650-625-0436 -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED]] On Behalf Of Don France (TSMnews) Sent: Tuesday, April 23, 2002 3:20 PM To: [EMAIL PROTECTED] Subject: Re: TDP for NDMP You've just about gottit all. There is some concern about this whole thing; currently, you are limited to image backups using NDMP; if you want file-level granularity, you must use NFS mount to access the file system from a supported b/a-client... not as pretty as you'd like, but that's the way it is. Then, too, you are limited to NAS filer; Auspex and other filers are not supported. The storage pool limitation comes from the format used to store the data; they "invented" a new concept/format for NDMP storage pools, so must be kept segregated from "standard" storage pools; I THINK you can still use "backup stg" command -- but you cannot intermix the different types of primary storage pools in a common copy-pool. IBM/Tivoli is wondering how much market there is to justify expanding this support -- (a) file-level granularity and/or (b) other filers. IMHO, I'd want to see file-level granularity. Comments can be posted here... Don France Technical Architect - Tivoli Certified Consultant Professional Association of Contract Employees (P.A.C.E.) San Jose, CA (408) 257-3037 [EMAIL PROTECTED] ----- Original Message ----- From: "Gerald Wichmann" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, April 17, 2002 9:47 AM Subject: TDP for NDMP > Has anyone used and had any experiences with NDMP backups? I'm curious > what kind of experiences you've had using the product. Pros/cons, etc.. > > I've been reading the admin guide section on it and it seems like a > whole other beast to what I'm used to with TSM. E.g. your NDMP file > server has to be attacked to the tape drive. Seems like this would be > undesirable if you had a lot of file servers. Would you have to buy a > comparative # of tape drives? Or how many tape drives could you share > between your file servers and TSM server? > > Theres a comment about "you cannot backup a storage pool used for NDMP > backups". Does this mean you can't create a copypool and 2nd copy of the > backed up data? > > Do the NDMP backups only backup the entire file server and restore the > entire file server? I guess it's not clear to me on what level of > granularity there is in backing up NDMP file servers. > > Seems like NDMP backups require their own TSM domain/policyset/etc > structure as well. > > Also I understand it only works with Network Appliance NAS devices? > > Appreciate anyone with practical knowledge to comment on their > experience and perhaps clarify some of my questions above.. thank-you
