Francisco,
those numbers are normal. 3590 drives have a native transfer rate of
12MB/s. that makes around the 50GB/h mark. to have more than that you have
to compress your data, and the 3590 can compress up to 3:1. whether you can
do that or not depends on your data (3:1 compression ratios are generally
achieved only in mainframe world; in open systems you would expect
something closer to 2:1). other than that, it depends on the number of tape
drives used, and the bandwidth occupancy at backup time if you are in a LAN
environment as it would seem to be your case.


Cordiali saluti
Gianluca Mariani
 Tech Support SSD
Via Sciangai 53, Roma
 phones : +39(0)659664598
                   +393351270554 (mobile)
gianluca_mariani AT it.ibm DOT com



                      Francisco Molero
                      <fmolero AT YAHOO DOT CO        To:       ADSM-L AT 
VM.MARIST DOT EDU
                      M>                       cc:
                      Sent by: "ADSM:          Subject:  BACKUP to TAPE, 
PERFORMANCE
                      Dist Stor
                      Manager"
                      <[email protected]
                      .EDU>


                      05/29/2002 12:00
                      PM
                      Please respond to
                      "ADSM: Dist Stor
                      Manager"





Hi everybody,

My question is simple. We are running selective backup
through Gigabit, and my STGpool is 3590 Tape Pool. I
want to know, how many Gigabytes you backup per hour??

For bigger files I get a 52 GByte/hour. And I think
these is very slow. This test is only 1 client and no
other clients are accessing to Server.

Any Ideas ????

Thanks, Fran.


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