What OS? Is the LUN owner going to do the backup? Is it a shared file system? Consider a storage pool just for this file system. Use phrases like: "It will be a miracle" "Is a 7 day RTO required?" "Who gets fired when it goes away?"
Andy Huebner -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Zoltan Forray/AC/VCU Sent: Thursday, May 27, 2010 8:36 AM To: ADSM-L@VM.MARIST.EDU Subject: Re: [ADSM-L] why create a 12TB LUN Been there..........wrote the book.............saw the movie...............have the T-shirt..............and the war-wounds......... If you recall, I had to restore a Windoz filesystem, over the Christmas holidays, with over 50M objects - only 4TB occupancy. Server kept running out of storage to hold the list of objects and couldn't do a NQR.................... had to do manual directory-by-directory............. Not a pretty sight............ From: Kelly Lipp <l...@storserver.com> To: ADSM-L@VM.MARIST.EDU Date: 05/26/2010 09:08 PM Subject: Re: [ADSM-L] why create a 12TB LUN Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> Geoff, As you well know, it isn't the 12TB that's the problem: it's the 40M files they're going to put on it! Actually, I think TSM is the only thing that will be able to backup such a thing. Incremental forever is the only way. Put Journaling on and it gets done. Now, that's backup. Forget restoring it! That won't happen in any reasonable amount of time now will it? Kelly Lipp Chief Technology Officer www.storserver.com 719-266-8777 x7105 STORServer solves your data backup challenges. Once and for all. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Gill, Geoffrey L. Sent: Wednesday, May 26, 2010 5:04 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] why create a 12TB LUN I'm guessing many of you will find this quite odd, I know I did, but I had someone come to me and say they were going to ask for a 12TB LUN and wanted to back it up. Without even mentioning the product they want to use, obviously not TSM though, and I'm not even sure it would make difference, how would you manage to get a 12TB LUN backed up daily. I would expect it to be at least 75% full if not more, and even without knowing what percentage of data changes on it, it would seem to me the request seems strange. They're thinking of getting a VTL and backing up through fiber direct, not across the network, but no idea which one or what sort of throughput to expect. Have any of you been approached with this sort of request and if so what was your response? I'm sort of dumbfounded at this point since I've not heard or seen this anywhere. Thanks, Geoff Gill TSM/PeopleSoft Administrator SAIC M/S-B1P 4224 Campus Pt. Ct. San Diego, CA 92121 (858)826-4062 (office) (858)412-9883 (blackberry) This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments. Thank you.
