We are in the same situation - possibly changing from Win Servers (using some kind of microsoft replication) with BA client backups to NAS systems . . .about +20tb of data also. So I'm also interested in any comments.
I've been reading the vendor manuals, TSM doc's and Redbooks, this mailing list archive and anything else that Google finds. Here is what I "think" I've found out . . 2 ways to backup NAS: BA client on a CIFS share, and NDMP. NDMP: - uses full/incremental/differential backups - ndmp on netapp can be either file level or block/volume level - ndmp on celerra is only file level - file level ndmp backups are still "file" backups - lots of little files will STILL be a challenge! - a tsm ndmp pool cannot be migrated, reclaimed, movedata'ed - not sure about copy pools - it's the tsm management class that determines how long the backup is retained BA Client on a Share: - no journal backups (it's not a win filsystem!) - CIFS is slow - backups will take a long time - you do get to keep using your normal TSM mgt class policies - for netapp, there is a new snapdiff which provides journal like capabilities (saw some emails that this was very good!) The main point I've come away with is that switching to a NAS will not solve our backup problems . . .just change problems somewhat. I would appreciate any comments, additions, and especially CORRECTIONS. Thanks! Rick "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> wrote on 06/23/2010 11:39:35 AM: > We currently use traditional windows fileservers, but are being presented with an "opportunity" to start using a NAS device. > I've been reading up on NDMP, doesn't sound to me like NAS is the backup admin's friend. > Can anyone who has gone down this road share any of the biggest pros/cons/gotchas? > I seem to recall from several years ago that getting the backup data offsite was an issue, but the NAS vendor claims this is no longer true. > > Currently using half a dozen fileservers to manage about 20TB of user data. > > Thanks, > > Steve Schaub > Systems Engineer, Windows > BlueCross BlueShield of Tennessee > ----------------------------------------------------- > Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.