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The more data you collocate, the fewer tape mounts are required during restores. The downside
is that you will significantly increase the amount of tapes you use.
Deduplication does not support co-location because this feature is unnecessary when using a
disk-based backup solution.
NDMP backup: Deduplication does not currently support LAN-free NDMP with TSM. This
means you can only backup an NDMP filer over the LAN to the VLS.
Oracle RMAN Scripting: See
Virtual volumes: TSM allows one TSM server to store its data on another TSM server. The TSM
server that sends the data to be stored on the other server is the source server, and the server
that stores the received data is the target server. With virtual volumes, the source server treats
the target server like a tape library, and the target server treats the source server as a special
type of client node.
Deduplication does not support TSM virtual volumes.
Firmware Version 3.4
Incremental forever: The TSM (Tivoli Storage Manager) "incremental forever" scheme of
backups are all effectively treated as full backups by the deduplication, so every new backup
is compared against the previous backup. With file server backups that contain just the modified
files, this may result in lower deduplication ratios because most or all of the new backup data
is unique, but database backups (which are normally the entire database every time) will give
normal deduplication ratios.
Mount retention: You must set the mount retention to 0 (zero) for your server configuration as
follows:
dsmadmc -id=admin -pass=admin update devclass <vtlclass> mountret=0
Substitute the password for "admin" above with your TSM server admin password.
Management classes: To assign a management class other than the default to all files, use an
include statement in your client systems options file, or by using an include-exclude file specified
by the "inclexcl" option. To specify your own default management class for files that are not
explicitly included, specify the following as the first include or exclude option defined:
For non-Windows hosts (such as HPUX, Linux, and AIX), add the following to the dsm.sys
file for the appropriate directories being backed up:
◦
This will backup all directories and files under /backup/:
include /backup/.../* mgmt_class_name
◦
This will backup all directories and files under /:
include /.../* mgmt_class_name
For Windows hosts, to specify a management class named mgmt_class_name for all files
to which you do not explicitly assign a management class, add the following to the dsm.opt
file for Windows systems for the appropriate volumes/directories being backed up:
This will backup all directories and files under e:\backup:
◦
include e:\backup\...\* mgmt_class_name
◦
This will backup all directories and files under e:\:
include e:\...\* mgmt_class_name
◦
This will backup all directories and files under d:\:
include d:\...\* mgmt_class_name
The management class names are not case-sensitive.
146 VLS Configuration and Backup Application Guidelines
Oracle RMAN Scripting
for details.
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