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Message Posted: Wed, 10 Jul 2002 @ 09:04:24 GMT

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Subj:   Re: AT&T has largest data warehouse in the world???
From:   Street, John

This is an extract from Information Week abut Petabyte databases 11th Feb 2002


The CERN DB is not a decision support DW as such but a database storing hundreds of TB of data like the Stanford one which has reached 500Terabytes


So far, no one's cracked the petabyte milestone. But somewhere between five and 10 databases, mostly in government and university laboratories, store several hundred terabytes and are quickly approaching 1 petabyte. One of the biggest resides at the Stanford Linear Accelerator Center in Menlo Park, Calif., a national laboratory at Stanford University where particle-physics researchers study the reams of data generated by the laboratory's particle accelerator in an effort to understand the relationship between matter and antimatter. Researchers add 2 terabytes of data every day to an already-brimming 500-terabyte database, leaving the IT staff to wrestle with the challenging task of managing all that information. "We try to compress it as much as we can to save disk space and cut costs," says Jacek Becla, database group manager. The laboratory keeps 40 terabytes of data on disk for quick access and the rest on tape, yet still connected to the database. It expects to hit the petabyte mark early next year.

The largest database on the drawing boards is at CERN, the European organization for nuclear and particle physics research in Geneva, Switzerland. CERN is constructing a particle accelerator that will begin operating in 2006, and IT managers at the laboratory are designing a system to collect up to 20 petabytes of data from the accelerator every year, potentially leading to the accumulation of hundreds of petabytes. A prototype database CERN is assembling now should reach 1 petabyte by 2004 (see sidebar story, "CERN Project Will Collect Hundreds Of Petabytes Of Data").

Additional info on DW sizes can be found in the 2001 Winter Report on the Database Scalability Program which still shows SBC as being the largest DW in the world AT&T as the 7th. The report focuses on decision support databases not number crunchers or lab and the research was done in 2001.



John Street
Senior Principal Consultant,
Relationship Technology Solutions for Financial Services,
NCR Limited

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