Hi Andy, Make sure you have a budget for tapes. Our old NetApp solution was eating tapes. Approx 100 LTO-4/LTO-5 a week. And if you are going to save the Full Backup X number of weeks and then keep diff backups for Z numbers of days. Then do you need to create multiple full backups. One full backup with X Weeks Management Class and another full backup with Z days Management Class that you also can continue with Diff backups.
Another issue is that if you are going to backup to Disk then will NDMP allocate the size of the partition and not the amount of data to backup. If you have a small diskpool, then will NDMP go direct to next storage pool. And it is not recommended to backup to Virtual Tape Pool where TSM create virtual tapes on another TSM Server. Try to backup direct between your NAS and to Tape over the SAN. Make sure you also create a "large" TOCPool. Our TOC pool on NetApp is now over 500GB large. Also when you load the TOC to restore, does your TSM Database Size need to be large enough temporary to contain the entire TOC. This is a couple of tips. One thing I never tried is the new SnapDiff function if that now works for vFilers. I think Wanda has more info about this. Best Regards Christian Svensson Cell: +46-70-325 1577 E-mail: [email protected] Säkra återläsningar. -----Ursprungligt meddelande----- Från: Huebner, Andy [mailto:[email protected]] Skickat: den 2 januari 2013 17:06 Till: [email protected] Ämne: Re: Help with NDMP dump & diff expiration Another option, the one we use, is to use the NAS to snap a copy and keep that snap for some number of days and only make full dumps once a week. Andy Huebner -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Prather, Wanda Sent: Thursday, December 27, 2012 4:41 PM To: [email protected] Subject: Re: [ADSM-L] Help with NDMP dump & diff expiration Exactly what I needed to know. Thanks Remco. (.... and saves me the trouble of putting in another RFE!) -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[email protected]] On Behalf Of Remco Post Sent: Thursday, December 27, 2012 12:44 PM To: [email protected] Subject: Re: [ADSM-L] Help with NDMP dump & diff expiration Hi, I once raised an RFE for managing diffs separately from the fulls. Unfortunately the answer is NO. workaround: use multiple nodenames and make fulls on both nodenames and diffs only with one.... yes a pita and a waste of tapes... if only IBM could think of something better ;-) On 27 dec. 2012, at 18:05, "Prather, Wanda" <[email protected]> wrote: > Need some help from folks doing "external" NDMP dumps, where TSM triggers the > dump but it's done by the NAS device across the fibre to pool defined as > TYPE=NDMPDUMP, not a standard TSM storage pool. > > Have a customer installing an EMC (VNX) NAS which will store multiple > millions of .pdf files. The data change rate is very low, but can't back up > via the CIFS mount using the regular client, too many files to scan the > filesystem. And VNX doesn't support snapdiff. > > So the plan is to have the VNX do full and diff dumps under TSM control. > Customer wants monthly fulls + daily diffs between, and wants to be able to > go back a year. > > My experience is with NDMP via TCPIP in a normal TSM storage pool, but the > thing I see there is that when you do a new full, the previous diffs don't > expire. > > There's no reclaim for a pool defined as TYPE-NDMPDUMP, so how do you handle > this without keeping 365 cartridges tied up in the vault? Is there a good > way to blow way those "in between" diffs? > > Thanks and Happy New Year > > Wanda (NDMP is Evil) P > > > Wanda Prather | Senior Technical Specialist | > [email protected] | www.icfi.com ICF International | 401 E. > Pratt St, Suite 2214, Baltimore, MD 21202 | 410.539.1135 (o) -- Met vriendelijke groeten/Kind Regards, Remco Post [email protected] +31 6 248 21 622
