--- begin forwarded text Date: Tue, 25 Jan 2000 18:05:39 -0500 From: Richard Lethin <[EMAIL PROTECTED]> Organization: Reservoir Labs, Inc. To: [EMAIL PROTECTED] Subject: [Fwd: 1/28/00 C.S. Colloquium] Sender: [EMAIL PROTECTED] Reply-To: Richard Lethin <[EMAIL PROTECTED]> -- Reservoir Labs, Inc. 628 Broadway, Suite 502 New York, NY 10012 212-780-0527 http://www.reservoir.com Return-Path: <[EMAIL PROTECTED]> Received: from cs.nyu.edu (CS.NYU.EDU [128.122.80.78]) by deer-park.reservoir.com (8.9.0/8.9.0) with ESMTP id PAA07926 for <[EMAIL PROTECTED]>; Tue, 25 Jan 2000 15:15:54 -0500 (EST) Received: (from majordom@localhost) by cs.nyu.edu (8.9.1/8.9.1) id OAA22855 for colloq-outgoing; Tue, 25 Jan 2000 14:45:47 -0500 (EST) X-Authentication-Warning: cs.nyu.edu: majordom set sender to [EMAIL PROTECTED] using -f Received: from dept.cs.nyu.edu (dept.cs.nyu.edu [128.122.80.31]) by cs.nyu.edu (8.9.1/8.9.1) with ESMTP id OAA22851 for <[EMAIL PROTECTED]>; Tue, 25 Jan 2000 14:45:45 -0500 (EST) Received: (from amico@localhost) by dept.cs.nyu.edu (8.9.1/8.9.1) id OAA08478 for colloq@cs; Tue, 25 Jan 2000 14:45:45 -0500 (EST) Date: Tue, 25 Jan 2000 14:45:45 -0500 (EST) From: Rosemary Amico <[EMAIL PROTECTED]> Message-Id: <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: 1/28/00 C.S. Colloquium Sender: [EMAIL PROTECTED] Precedence: bulk X-Mozilla-Status2: 00000000 ========================================================================== Department of Computer Science Courant Institute New York University DEPARTMENTAL COLLOQUIUM Allan Gottlieb New York University Intermemory The Intermemory project proposes an autonomous, world wide distributed system that will maintain information archivally and will offer extremely high availability without the storage costs of a large number of mirror sites. Information is dispersed in a redundant fashion so that only if an improbably large number of systems are down can the data not be retrieved. With one set of parameter values, an availability level comparable to more than 500 mirror sites can be obtained with a storage cost that is less than just 5 mirrors. If one assumes that the long standing exponential growth in bytes/dollar and hence bytes/system will continue, it can be shown that a contribution of storage to the system for a finite time period can entitle to the contributor to permanent ownership of (a smaller amount of) system storage. When exponential increases end, the guarantees weaken but are still attractive. The Intermemory project exposes important questions in areas as diverse as cryptography and DNS (domain name service). Recently the project has begun investigating intramemories, that is storage accessible throughout a smaller domain. Applications range from a single lan to a corporate-wide database. A major difference is that security is less of a concern since hosts are under a single administrative domain. Lowering the protection requirements will result in higher performance. When the system is restricted to a single lan, further simplifications are available and much higher performance is expected. Our implementations to date have all required that the data to be stored is write-once, i.e. immutable. We continue to examine the possiblility of full read-write support and believe that a system based on a form of ``session semantics'' in which all updates to a subtree are applied during a session of limited duration looks promising. Friday, January 28, 2000 11:30 a.m. - 12:30 p.m. Room 101 Warren Weaver Hall 251 Mercer Street New York, NY 10012-1185 Refreshments will be served in the Grumman Lounge from 11:00 - 11:30 a.m. in 13th floor of Warren Weaver Hall. Host: Allan Gottlieb, ([EMAIL PROTECTED]) (212) 998-3344 Directions: http://www.cs.nyu.edu/directions/new_wsq-campus.html Colloquium Information: http://www.cs.nyu.edu/calendar2.html ============================================================================== --- end forwarded text ----------------- R. A. Hettinga <mailto: [EMAIL PROTECTED]> The Internet Bearer Underwriting Corporation <http://www.ibuc.com/> 44 Farquhar Street, Boston, MA 02131 USA "... however it may deserve respect for its usefulness and antiquity, [predicting the end of the world] has not been found agreeable to experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'
