Re: BACKUP to TAPE, PERFORMANCE
2002-05-29 12:57:39
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"
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05/29/2002 12:00
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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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