01-14-2013 10:00 AM
For our larger databases with many 100's or 1000s of backup pieces the admin operations of RMAN are very slow when interacting with Netbackup. Are there tools on the netbackup side to diagnose this? We have verified with Oracle that RMAN catalog is not the issue. Its taking nearly 15minutes per delete backup piece operation. Any thoughts on this?
Is there an index or catalog operation for the media server catalogs that we should have the netbackup admins perform?
Thanks for your help.
Solved! Go to Solution.
02-04-2013 02:02 PM
01-14-2013 10:31 AM
Oh .. before someone posts about the format of the file names .. they follow this format
"FORMAT 'bk_%d_%s_%p_%t' "
01-14-2013 12:20 PM
Article URL http://www.symantec.com/docs/TECH49868
old technote probably still applies
NetBackup for Oracle Agent designed to reduce the chance that an Oracle backup could not be found for restore, due to complexities that can be introduced by certain Recovery Manager (RMAN) procedures and conventions. Under normal circumstances, this allows an available backup to be found sooner than before these changes. If the backup has expired in the NetBackup catalog, however, significant additional checking is done before RMAN is informed that NetBackup is not able to locate the backup image. This results in longer execution time for RMAN "crosscheck" and "delete expired" operations.
...
A better approach to manage the catalog synchronization is to use the Oracle and Symantec recommended method. This method is to set the backup retention as an RMAN attribute, rather than a NetBackup attribute, and having RMAN delete obsolete, but unexpired, backups from NetBackup
01-14-2013 12:24 PM
Yes . . we are following those best practices.. Having the admins look into this note:
Indexing the catalog for faster access to backups
If the NetBackup environment contains a large number of backups, consider
indexing the catalogs to reduce the time that is required to restore files.
To index the catalog means to create indexes of the files that are recorded in the
NetBackup image catalog. NetBackup uses the indexes to go directly to the catalog
entry for a file. Without indexing, NetBackup must start searching for a file at
the beginning of the catalog entries.
To index image header files, run the following command:
bpimage -create_image_list [-client name]
Run this command to create the following index files in each client image directory:
IMAGE_FILES
IMAGE_INFO
IMAGE_LIST
To stop image header indexing for a client, remove these files.
Additional information is available about bpimage in the NetBackup Commands
Reference Guide.
02-04-2013 01:25 PM
Any update on this? We are seeing similar issues. There are mentions of indexing the catalog, but I have not seen any mention of it until this post.
-create_image_list is an unrecognized option in 7.5.0.4
DT
02-04-2013 02:02 PM
02-04-2013 02:03 PM