Dear ADSMer,

Client Version: Solaris 3.1.0.7
Server Version AIX  3.1.2.40
Drives: 3590E / Firmware mostly-up-todate

... changing one client with about 1.000.000 files
from compression=NO to Compression=yes
and running the backup full against all files we got
the Data ( about 64 GB ) on the 3590 Tapes in the
following output ( the client is the only one in this stg-pool):

adsm> q vol stg=tape_*

Volume Name               Storage      Device      Estimated    Pct
Volume
                          Pool Name    Class Name   Capacity   Util
Status
                                                        (MB)
------------------------  -----------  ----------  ---------  -----
--------
--------
URZ013                    TAPE_O26_1   3590CLASS    18,569.5  100.0
URZ013                    TAPE_O26_1   3590CLASS    18,569.5  100.0
Full
URZ087                    TAPE_O26_1   3590CLASS    18,322.9  100.0
Full
URZ124                    TAPE_O26_1   3590CLASS    18,266.4  100.0
Full
URZ202                    TAPE_O26_1   3590CLASS    20,000.0   53.0
Filling

... my question now is : can I do something parameter-tuning
to get more out of the tapes ( more near by 20 GB )  ?
is the difference caused by the number
of files  or does the compression  mode of the Clientfiles have an
effect
on the space used by adsm somehow ?


Thanks in advance !
Rainer

--
 __________________________________________________________
 __________________________________________________________

 Rainer Wolf   rainer.wolf AT rz.uni-ulm DOT de
 Tel: 0731-50-22482  Fax: 0731-50-22471
 Universitaet Ulm
 Universitaetsrechenzentrum Albert-Einstein-Allee 11
 AG Basissysteme  89069 Ulm