________________________________ From: [EMAIL PROTECTED] on behalf of HENDERSON MIKE, MR Sent: Fri 10/12/2004 20:35 To: [EMAIL PROTECTED] Subject: Unclassified RE: [U2] UniVerse Backup/Resizing Questions
We keep our Production databases on mirror sets*. To backup, we quiesce the system, break the mirror, then start running again (total time ~2 minutes). Now backup from the 'broken' half of the mirror (use anything you like, no files are open), then re-sync the mirror sets. If you can't even afford a couple of minutes outage, then I think I'd do it like this: SUSPEND.FILES ON, mirror split, SUSPEND.FILES OFF, backup from the 'broken' half of the mirror using uvbackup, now re-sync the mirror sets. And you really need to be using transactions in this scenario, otherwise you risk not being able to restore to a consistent state. HTH Mike * Actually, they're on an EMC array with a three-way mirror, so when we do a mirror-split, we've still got a mirrored pair set of disks for our production data and no one-disk failure vulnerability. Disks are REALLY CHEAP these days! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Saturday, 11 December 2004 07:18 To: [EMAIL PROTECTED] Subject: RE: [U2] UniVerse Backup/Resizing Questions Yet the problem with NT backup, or any non-universe oriented utility, that saves ACTIVE files, is that it/they have no universe concurrency control; you run a great risk of saving corrupted (pointers in transition) images of files, UNLESS you make certain no users are WRITING (updating). That was the reason I was tasked with writing uvbackup/ uvrestore back in '91: to create a utility that mimicked cpio (albeit loosely) that understood the universe file structure and implemented concurrency control. I spent many long nights fixing broken customer files because of exactly this... -----Original Message----- From: Anthony Caufield [mailto:[EMAIL PROTECTED] Sent: Friday, December 10, 2004 12:38 PM To: [EMAIL PROTECTED] Subject: RE: [U2] UniVerse Backup/Resizing Questions I have found that uvbackup is not the answer NT backup works but is not very good on compression. No matter what you use I highly recommend St Bernard's Open File Manager it makes sure you can backup all files. Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Schexnayder Sent: Friday, December 10, 2004 9:13 AM To: [EMAIL PROTECTED] Subject: [U2] UniVerse Backup/Resizing Questions Hello, We are rolling out our product on UniVerse 10.1/NT, currently we are running on D3, and we have a couple UniVerse questions. 1) Resizing. When we asked IBM about resizing, their answer was "FAST". However, I am not impressed with the product nor the expense, are there any alternatives? 2) Backups. I read another thread where the user indicated that they used UVBackup to create a file, and then the O/S backed up that file. Is that the general consensus? Others I have spoken with have indicated that they use only an O/S backup. In that case, what about locks and users on the system? Is there a best way to do backups? Thanks so much for your help, Dave Schexnayder Cheetah Advanced Technologies, Inc. ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/ The information contained in this Internet Email message is intended for the addressee only and may contain privileged information, but not necessarily the official views or opinions of the New Zealand Defence Force. If you are not the intended recipient you must not use, disclose, copy or distribute this message or the information in it. If you have received this message in error, please Email or telephone the sender immediately. ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/ The information contained in this email is strictly confidential and for the use of the addressee only, unless otherwise indicated. If you are not the intended recipient, please do not read, copy, use or disclose to others this message or any attachment. Please also notify the sender by replying to this email or by telephone +44 (0)20 7896 0011 and then delete the email and any copies of it. Opinions, conclusions (etc.) that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. IG Markets Limited and IG Index Plc are authorised and regulated by the Financial Services Authority and, in Australia, by the Australian Securities and Investments Commission. [demime 1.01d removed an attachment of type application/ms-tnef which had a name of winmail.dat] ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/
