Re: 1 TB _a day_ at CERN (was: 21 terabytes at NYNEX)

In article <Pine.BSI.3.91.960517164133.16987A-100000_at_cripplecock.sarc.city.ac.uk>, Akmal B Chaudhri <akmal_at_sarc.city.ac.uk> wrote:
>On Sun, 12 May 1996, Mark Rosenbaum wrote:
>
>[snip]
>
>Mark,
>
>Your ideas are very interesting, but this 21 TB at NYNEX is insignificant
>when compared to the 1 TB a day (5 PB a year for several decades) that
>CERN will be generating for the next generation High Energy Physics (HEP)
>experiments (the data is something of the order of 10^17 bytes). CERN will
>be using an OODB (Objectivity/DB)!
>
>Any ideas that might help them?
>
>Cheers,
>
>--

Akmal,

This sounds like it may be a tape library issue. I am assuming that CERN is NOT trying to put 150 PB online in the near future, or even 15 in the next 3 years. If that is the case then the data would reside on nearline tape robots and only the indexing info and currently used data would be on disk.

So what is the disk requirement to go with the PB tape requirement?

Mark Rosenbaum				Otey-Rosenbaum & Frazier
mjr_at_netcom.com				Consultants in High Performance and
(303) 727-7956				Scalable Computing and Applications