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EDU^SHORE^
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Date: Thu, 07 Nov 1996 19:22:32 GMTServer: NCSA/1.5Content-type: text/htmlLast-modified: Tue, 06 Aug 1996 17:27:39 GMTContent-length: 13119<HTML><HEAD><TITLE>SHORE Project Home Page</TITLE></HEAD><BODY><H1>SHORE - A High-Performance, Scalable, Persistent Object Repository</H1><HR>Document Contents:<UL><LI><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><!WA0><A HREF="#Objective">Objective</A><LI><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><!WA1><A HREF="#Overview">Overview</A><LI><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><!WA2><A HREF="#Release">Release Information</A><LI><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><!WA3><A HREF="#mail">Mailing Lists</A></UL>See Also:<UL><LI>Shore, version 1.0 <UL> <LI><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><!WA4><A HREF="http://www.cs.wisc.edu/shore/1.0/shore.html"> On-line Information </A> <LI><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><!WA5><A HREF="ftp://ftp.cs.wisc.edu/shore/1.0/"> Source, Binaries and Documentation </A> </UL><LI><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><!WA6><A HREF="http://www.cs.wisc.edu/shore/beta.html">The Beta-release of Shore (version 0.9.3)</A><LI><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><!WA7><A HREF="http://www.cs.wisc.edu/shore/shore.papers.html">Publications related to Shore</A><LI><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><!WA8><A HREF="http://www.cs.wisc.edu/shore/shore.people.html">People working on Shore</A><LI><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><!WA9><A HREF="http://ftp.arpa.mil/Summaries/Wisconsin--Carey--SHORE.html">Latest Research Summary for ARPA</A><LI><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><!WA10><A HREF="http://www.cs.wisc.edu/paradise/">Paradise Project: a GIS built on SHORE</A><LI><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><!WA11><A HREF="http://www.cs.wisc.edu/exodus/">EXODUS Project: the predecessor to Shore</A><LI><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><!WA12><A HREF="file://ftp.cs.wisc.edu/oo7">OO7 Benchmark: a benchmark for OODBs</A><LI><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><!WA13><A HREF="http://www.cs.wisc.edu/shore/shore.album.html">Shore Photo Album</A><LI><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><!WA14><A HREF="http://www.cs.wisc.edu/~kristint/dbmshome.html">UW-Madison, Database Research Group </A></A><LI><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><!WA15><A HREF="http://www.cs.wisc.edu/">UW-Madison, CS Department Server</A></UL><HR><H2><A NAME="Objective">Objective:</A></H2>The objective of the SHORE project is to design, implement, andevaluate a persistent object system that will serve the needs of a widevariety of target applications including hardware and software CADsystems, persistent programming languages, geographic informationsystems, satellite data repositories, and multi-media applications.Shore expands on the basic capabilities of the widely-used<!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><!WA16><A HREF="http://www.cs.wisc.edu/exodus/">EXODUS</A>Storage Manager (developed at Wisconsin, funded by<!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><!WA17><A HREF="http://ftp.arpa.mil"> ARPA </A>) in a number ofways including support for typed objects, multiple programminglanguages, a "Unix-like" hierarchical name space for named objects, anda Unix-compatible interface to objects with a "text" field. Thisinterface is intended to ease the transition of applications from theUnix file system environment to Shore as existing Unix tools such as viand cc will be able to store their data in Shore objects withoutmodification (basically a Unix file becomes either a single Shoreobject or the text field of a more complex object).<P><HR><H2><A NAME="Overview">Overview:</A></H2>SHORE is something of a hybrid system by nature, inheritingcharacteristics both from object-oriented database systems and fromfile systems. This section briefly describe the basic features ofSHORE. The paper,<!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><!WA18><A HREF="file://ftp.cs.wisc.edu/tech-reports/reports/94/tr1222.ps.Z">Shoring Up Persistent Applications</A>,describes SHORE in much greater detail.SHORE has three major goals:<UL><LI>Scalability<LI>Support for hardware and language heterogeneity<LI>Support for existing, file-based applications</UL>When the SHORE project began 3 years ago, these goals were uniqueamong the research and commercial OODBMS community. While the<!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><!WA19><A HREF="http://www.odmg.org:3083"> ODMG effort </A>has also concentrated on providing some degree of support for languageheterogeneity (which, in turn, facilitates hardware heterogeneity),SHORE remains distinguished by its focus on scalability and supportfor applications that depend on the Unix file system for persistentstorage. Furthermore, since the SHORE data model (SDL) is basically<!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><!WA20><A HREF="#foot1">compatible with the ODMG data model (ODL)</A>,we expect that much of the technology that we develop can eventually betransferred to the commercial sector.<H3>Scalable Architecture</H3>SHORE's software architecture is unique is several ways.First, SHORE uses a symmetric, peer-to-peer distributedarchitecture. In SHORE, every participating processor runs aSHORE server process <em>whether or not the processor has SHORE data disks</em>attached. The software has been designed to be scalable;it can run on a single processor, a network of workstations, ora large parallel processor such as the Intel Paragon or IBM SP1/2.This design is in contrast to the client-server architectureused by EXODUS and all the OODBMS vendors. While a client-serverarchitecture is fine for a design environment such as is typicallyused in software and hardware CAD efforts, it is not scalable.<P>The second unique feature of the SHORE architecture is its notionof a ``value-added'' server. By structuring the software that runsin the server with extensibility in mind, it is relatively simple forusers to build application-specific servers. For example, the<!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><!WA21><A HREF="http://www.cs.wisc.edu/~jignesh/paradise.html">Paradise project </A>is already using the SHORE server to build a geographic information system for<!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><!WA22><A HREF="http://eos.nasa.gov/"> NASA'sEOSDIS project.</A><P>We feel that these two unique pieces of technology will play aimportant role in a variety of future research and commercial endeavors.For example, the digital libraries of the future will almost certainlydepend on the availability of scalable, persistent object technology.Such systems are going to store, retrieve, manipulate, and transmitobjects containing video and pictures as well as text. Whilecurrent OODBMS products could be used, these systems are orientedtoward dealing with gigabytes, and not terabytes, of data.Customizability is equally important. The indexing, retrieval,and query processing mechanisms needed for a digital libraryare very different from those required for a geographic informationsystem.<H3>Language and Hardware Heterogeneity</H3>Objects in SHORE are typed. SHORE provides a single, language-neutraltype system that is used to define the types of all SHORE objects.This type system is embodied in the SHORE Data Language (SDL),which is the language in which SHORE object types are defined.SDL enhances the OMG data model IDL with support for databasefeatures such as bulk types (e.g., sets and lists) and persistence.The provision of typed persistent objects simplifies the task ofsupporting heterogeneous hardware environments and makes it feasibleto support access to persistent objects from multiple programminglanguages, which is a key objective of the SHORE project.As mentioned earlier, SDL is quite closely related to ODL,the language-neutral object type definition language that wasrecently proposed as a standard by the OODB vendor consortium ODMG.In terms of its emphasis, however, ODMG has largely concentrated onproviding a standardized interface to existing C++ oriented OODBs.Our focus is on support for inter-language object sharing withina large name-space of objects.⌨️ 快捷键说明
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