Negative compression

[miltonstrat]

Hi guys,

I do some backup using a tool named UVB (Unitrends Virtual Backup) to backup some vm's from a citrix virtual environment.

So the UVB app do the backup to a disk area and I use TSM baclient to read these files and send it to TSM.

The directory where the backups goes to is:

/uvb_bkp (1TB)

Occupied = 500GB

But, when I do the backup using TSM baclient (incremental or archive) TSM send more then 2TB to the tapes.

The results is like below:

Objects compressed by: -35%
Total data reduction ratio: 0.00%
Elapsed processing time: 18:03:30

How can I avoid TSM to uncompress the files?

Thanks!

 

[moon-buddy]

Turn off compression!

See help update node

 

[miltonstrat]

I've already did that and still...

SERVER1> q node uvb f=d
Node Name: UVB
Platform: Linux x86-64
Client OS Level: 2.6.32-504.3.3.el6.
Client Version: Version 7, release 1, level 0.0
Application Version: Version 0, release 0, level 0.0
Policy Domain Name: DOM_FILES_TAPE
Last Access Date/Time: 2015-07-30 17:14:16
Days Since Last Access: 1
Password Set Date/Time: 2015-07-23 10:58:42
Days Since Password Set: 8
Invalid Sign-on Count: 0
Locked?: No
Contact:
Compression: No
Archive Delete Allowed?: Yes



Status of the backup at this moment:





tsm: SERVER1>q ses

Sess Comm. Sess Wait Bytes Bytes Sess Platform Client Name
Number Method State Time Sent Recvd Type
------- ------ ------ ------ ------- ------- ------- -------- -----------------
289,194 Tcp/Ip Run 0 S 308.5 K 138.7 K Admin DSMAPI IBM-OC-SERVER1
296,089 Tcp/Ip Run 0 S 1.5 M 1.2 T Node Linux UVB
x86-64
297,192 Tcp/Ip IdleW 18 S 34.7 K 536.2 K Node Linux UVB
x86-64

Partition size:

Size Used Avail Use% Mounted on

/dev/mapper/vg_uvb-bkp 1008G 512G 446G 54% /uvb

 

[LED888]

Updating the node on the TSM Server should disable compression.

Since the results are still the same.

In the dsm.sys add COMPRESSALWAYS NO .
Since there is a change in the dsm.sys file, the schedule daemon need to be stop/restarted so that the new up date will be read.

Good Luck,
Sias

 

[ivandem]

Another option is to exclude the one file, or file type from compressing.

e.g. exclude.compression *.UVB

And, of course, restart the service/task/daemon