[no subject]

ADSM and TSM do not "know" that a file is compressed, per se. However, it
does detect if the file is growing during compression (which is most
likely because the file is already compressed). If the file grows during
compression and COMPRESSALWAYS YES (the default) is in effect, then it
will keep compressing the file anyway. This is causing the negative
compression that you are seeing. If COMPRESSALWAYS NO is in effect and the
file grows during compression, then all files in the current transaction
will be resent to the server, but the file that grew wll be sent
uncompressed. The trade-off is that in resending all the other files in
the current transaction, you may see a performance degradation in over-all
elapsed time, especially if there are lots of files that grow during
compression.

Regard,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Development
Internal Notes e-mail: Andrew Raibeck/Tucson/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com

The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.




Wolfgang Rest <webmaster AT HACKENSCHMIEDE DOT COM>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
01/22/2002 06:04
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:



01/21/2002 21:41:55 ANE4952I (Session: 196, Node: APOLLO)  Total number of
objects inspected:  129,216
01/21/2002 21:41:55 ANE4954I (Session: 196, Node: APOLLO)  Total number of
objects backed up:   43,830
01/21/2002 21:41:55 ANE4958I (Session: 196, Node: APOLLO)  Total number of
objects updated:          0
01/21/2002 21:41:55 ANE4960I (Session: 196, Node: APOLLO)  Total number of
objects rebound:          0
01/21/2002 21:41:55 ANE4957I (Session: 196, Node: APOLLO)  Total number of
objects deleted:          0
01/21/2002 21:41:55 ANE4959I (Session: 196, Node: APOLLO)  Total number of
objects failed:           4
01/21/2002 21:41:55 ANE4961I (Session: 196, Node: APOLLO)  Total number of
bytes transferred:     5.11 GB
01/21/2002 21:41:55 ANE4963I (Session: 196, Node: APOLLO)  Data transfer
time:                  911.71 sec
01/21/2002 21:41:55 ANE4966I (Session: 196, Node: APOLLO)  Network data
transfer rate:        5,886.47 KB/sec
01/21/2002 21:41:55 ANE4967I (Session: 196, Node: APOLLO)  Aggregate data
transfer rate:        992.76 KB/sec
01/21/2002 21:41:55 ANE4968I (Session: 196, Node: APOLLO)  Objects
compressed by:                  -16%
01/21/2002 21:41:55 ANE4964I (Session: 196, Node: APOLLO)  Elapsed
processing time:            01:30:05


Objects compressed by: -16%  ?!?!?!

How can this be? There are many .zip Files on this Server.. but i thought
ADSM will check if a File is
already compressed and dont compress it again.

I am running on Client side 3.1.0.8 and Server 3.1.2.90

best regards