11-28-2013 08:27 AM
Hi,
We're on NB7.5.0.3, mixed Unix and Windows, master server is a Win2008 server, storage is Data Domain.
We're testing restores of an Oracle database using RMAN. They're kind of working ok but the media server chosen for the jobs seems completely random - can be one on the local site or on the remote site. So we need to restrict which media servers are used.
The obvious solution seems to be to add entries to the Media Host Override option. The restores were performed by one or the other of two media servers on that site (which media servers are used for the backup is controlled via the Storage Unit), so i was planning to add entries so that each on is used to restore any job they were the original backup media server for, which would look like this:
ORIGINAL BACKUP SERVER RESTORE SERVER
server1 server1
server2 server2
A few questions:
1) I've noticed that the Master and all the media servers have a "media host override" dialog box int he windows Admin Console. Does it make any difference which is used - does the setting take effect globally? As the host that was backed up is also a media server, I was wondering if the media host override settings for that media server might only apply to restores of that server? Or are the media host override settings global wherever they are set?
2) Can ANY DD Bosst enabled media server be picked for a restore if this is not controlled by media host override? Even the master server was picked for one part of the restore.
3) Can media servers restore from a storage unit even if they are not assigned to that storage unit as an available media server? It seems like any DD boost server can read any storage unit when it comes to restores...
Thanks!
Solved! Go to Solution.
11-28-2013 08:45 AM - last edited on 01-03-2018 11:06 PM by Marianne
not sure why, but now this tech note is not finding..
http://www.symantec.com/docs/TECH87200
contect of the tech note, hopefully it will expline your queries.
Article ID: TECH87200 | | | Created: 2008-01-23 | | | Updated: 2011-06-02 |
Technical Solution for NetBackup Enterprise Server 6.0 6.5 6.5.3, NetBackup Enterprise Server 6.0 6.5 6.5.2, NetBackup Enterprise Server 6.0 6.5 6.5.1, NetBackup Enterprise Server 6.0 6.5 |
DOCUMENTATION: Restores and duplications from OpenStorage backup need not use the same media server that wrote the backup.
11-28-2013 08:45 AM - last edited on 01-03-2018 11:06 PM by Marianne
not sure why, but now this tech note is not finding..
http://www.symantec.com/docs/TECH87200
contect of the tech note, hopefully it will expline your queries.
Article ID: TECH87200 | | | Created: 2008-01-23 | | | Updated: 2011-06-02 |
Technical Solution for NetBackup Enterprise Server 6.0 6.5 6.5.3, NetBackup Enterprise Server 6.0 6.5 6.5.2, NetBackup Enterprise Server 6.0 6.5 6.5.1, NetBackup Enterprise Server 6.0 6.5 |
DOCUMENTATION: Restores and duplications from OpenStorage backup need not use the same media server that wrote the backup.
11-28-2013 09:34 AM
Hi,
I think that is out of date. It says you can only control which media server is used for restores with the touch file /usr/openv/netbackup/db/config/USE_BACKUP_MEDIA_SERVER_FOR_RESTORE. But recent threads say otherwise:
https://www-secure.symantec.com/connect/forums/restoring-using-different-media-server
It does answer my question 2) though - any media server credentialed for the storage server (e.g. any media server setup with dd boost and data domain credentials) can be chosen for the restore, unless otherwise restricted.
11-28-2013 11:44 AM
The TN that Nagalla posted is IMHO still valid.
Media server selection for restore is still exactly the same for OST as described in that TN.
The post that you are referring to is for a completely different scenario where the restore media server was in fact the one who did the backup (which is the default for tape backups) but the OP wanted another media server to perform the restore.
When more than 2 media servers share the same OST STU, Media Host Override (or FORCE_RESTORE_MEDIA_SERVER) cannot be used, as the media server chosen for restore becomes a 'moving target' due to selection criteria described in TECH87200.
11-29-2013 03:06 AM
Ok, thanks Marianne.
One more question: if I want to force a different media server for a specific scenario how do I do that if I have a global USE_BACKUP_MEDIA_SERVER_FOR_RESTORE command in effect?
Do I temporarily remove the touch file?
I can see that in the NB7.5 restore client i can choose a specific media server to perform the restore. Also there's the bprestore blahblahblah -disk_media_server option. Will they force another media server if USE_BACKUP_MEDIA_SERVER_FOR_RESTORE is still in place?
11-29-2013 07:09 AM
yes... you need remove the file "USE_BACKUP_MEDIA_SERVER_FOR_RESTORE" if you wnat to force to another media server.