From: Jamie Shiers Subject: Re: 1 TB _a day_ at CERN (was: 21 terabytes at NYNEX) Date: 1996/06/06 Message-ID: <31B6B986.6010@cern.ch>#1/1 sender: news@news.cern.ch (USENET News System) x-nntp-posting-host: iridium.cern.ch references: <318E022C.30A1@datamgmt.com> content-type: text/plain; charset=us-ascii organization: CERN mime-version: 1.0 newsgroups: comp.databases.olap,comp.databases,comp.databases.oracle x-mailer: Mozilla 2.02Gold (WinNT; I) Sorry, I forgot. The expected data rates are more like 10 TB/day for two of the experiments (ATLAS, CMS), and 150 TB/day for one of the others (ALICE). But again, not for a little while yet... Juergen Schlegelmilch wrote: > > On Sun, 26 May 1996 11:16:50 +0100, Akmal B Chaudhri wrote: > > > > I think the tape robots would be the standard way to put such large > > quantities of data on-line, as you rightly suggest. I believe CERN are > > looking into various mass-storage technologies to interface with an OODB > > for the longer-term. I have no idea about disk requirements, though. Even > > if anyone wanted to put such large quatities on disks, it would probably > > cost such an enormous amount of money to do so that I guess practically > > nobody (except maybe the US military) could afford it. Also, I don't see > > how disk technology is really going to improve that much over the time > > that they want to conduct these tests. > > Just yesterday I heard in an Objectivity RoadShow a talk from Jamie Shier > from CERN about this project (its name is rd45; sorry, there is a WWW page > with exact info but I did not write down its URL). They plan to use clusters > of machines running Objectivity, and believe that tapes are obsolete by that > time, i.e. will only use hard discs. Regarding the money: The price for > discs has dropped significantly over the last few months, and competition > will further put pressure on it; and compared to the cost for their physics > equipment are hard discs inexpensive, I believe. > > Regards, > Juergen > > -- > +-----------------------------------------------------------------------------+ > Dipl.-Inf. Juergen Schlegelmilch University of Rostock > email: schlegel@Informatik.Uni-Rostock.de Computer Science Department > http://www.informatik.uni-rostock.de/~schlegel Database Research Group > Tel: ++49 381 498 3402 18051 Rostock > Fax: ++49 381 498 3404 Germany > +-----------------------------------------------------------------------------+ -- Jamie