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Message Posted: Wed, 27 Jan 2004 @ 23:38:47 GMT

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Subj:   Re: arcmain throughput
From:   Bergman, Ysbrand

Hi Chris,

It's very tough to determine a reasonable speed for a mainframe based archive solution, but the speed that you are quoting sounds pretty reasonable to me. A lot is dependent on type of nodes, number of channels, use of channel directors, the availability of cpu and memory resources on the mainframe etc. I would recommend to investigate each of these areas and identify potential bottlenecks.

As a FYI: in direct attached BAR solutions (e.g. tape drives attached to the nodes using fibre or SCSI) we are also dealing with a number of variables, but they are limited since the number of components is limited as well. Direct attached solutions will range from 25Gb/Hr/Drive (5150/DLT7000) to 120Gb/Hr/Drive (5380/LTO-2 or 9940B).



Ysbrand Bergman
Support Specialist
a division of NCR

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