Re: [Veritas-bu] Rollback to 6.0 Plan, in case 6.5 flakes out
2008-02-15 20:07:32
Another point to keep in mind is that 6.0 -> 6.5 does a conversion of the images on your DSSUs (the .ds files go away).
Frankly my approach with the last two 6.0 -> 6.5 migrations has been to focus on going forward: fix it if it breaks rather than thinking about rolling back. Our 6.5 experience has been very positive thus far with the upgrade from 6.0MP4/5 quite painless. This is not like the 5.x -> 6.0 experience!!
--Larry
On 2/15/08, Mellor, Adam A. <Adam.Mellor AT woodside.com DOT au> wrote:
Kylie, I can understand that disk space may not be available, however: Disk mirroring. Utilising disk mirroring, I have always found this the best "rollback" method for most changes. Again, I have the "luxury" of
veritas volume manager, and mirroring / splitting pairs is relativly easy. If this is possible, it does cover every change done to the system (except DSSU with would not get mirrored). Catches with this are, you lose resiliance while you are down to a
single drive (un-mirrored), unless you can get a ternary mirror / spare disks to replace the one you split off (which you keep for your backout). ** Has anybodyd asked, can a 6.5 catalogue be imported back into 6.0 ?
If so, then what versions of NBU (or other systems) allow you to import the catalogue from a newer versions ( 5.1 into 5.0 ? 5 into 4.5 ?). My understanding is no you can't Based on my understanding of the catalogue issue, the longer you leave
it to backout, the more work is involved in getting back. If you leave your backout for a week (being used in production for 7days/nights) you can simply go back to your backup/mirror disk, however you have lost a weeks worth of backups.
Or before you backout, you take a note of all the tapes / backup images created since the upgrade, and after reverting to 6.0 doing the two reads of every tape modified and manually importing the images. Note
this may not even be supported by symantec (import into 6, images created in 6.5). When I have done big changes to my systems, I generally give it 24 hours, if I need to go back, after the backout, I ensure I get a full
backup of the "critical DB's", and a successful incremental of filesysystems that matter.) If there are issues after this point, then I see it as falling forward. Adam. -----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Kyle
Oliver Sent: Saturday, 16 February 2008 5:34 AM To: netbackup list Subject: [Veritas-bu] Rollback to 6.0 Plan, in case 6.5 flakes out Hello all, I am planning on upgrading my NetBackup servers from 6.0 MP4 to 6.5
and I am wondering if there is a roll back to 6.0 option? Is it enough to back up the c:\Program Files\VERITAS or /usr/openv directories to a new location and put them back in case of a water landing? I was going to ghost/flash archive the boxes, but that seems like a
bit of overkill. Thoughts? Suggestions? Thanks, Kyle _______________________________________________ Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
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