DOCSLIB.ORG

A Reference Architecture for Web Servers

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Reference Architecture for Web Servers A Reference Architecture for Web Servers Ahmed E. Hassan and Richard C. Holt Software Architecture Group (SWAG) Dept. of Computer Science University of Waterloo Waterloo, Ontario N2L 3G1 CANADA +1 (519) 888-4567 x 4671 {aeehassa, holt}@plg.uwaterloo.ca ABSTRACT document increases with the size and the complexity of the software system. Recently, a number of tools have A reference software architecture for a domain defines been developed to decrease this cost by helping to ex- the fundamental components of the domain and the tract the architecture of a software system [7, 16, 20, relations between them. Research has shown the bene- 21]. Using these tools, reverse engineering researchers fits of having a reference architecture for product de- have developed semi-automated processes to extract the velopment, software reuse, and maintenance. Many product’s architecture from available artifacts such as mature domains, such as compilers and operating sys- the product's source code and any available documenta- tems, have well-known reference architectures. tion. In this paper, we present a process to derive a reference The reference architecture [4] for a domain is an archi- architecture for a domain. We used this process to de- tecture template for all the software systems in the do- rive a reference architecture for web servers, which is a main. It defines the fundamental components of the relatively new domain. The paper presents the map- domain and the relations between these components. ping of this reference architecture to the architectures of The architecture for a particular product is an instance three open source web servers: Apache (80KLOC), of the reference architecture. During product develop- AOL-Server (164KLOC), and Jigsaw (106KLOC). ment, the product designer refines and extends the ref- erence architecture, based on the product’s require- ments and constraints. Recently, there has been some Keywords work on the derivation of reference architectures for Software architecture, reference architecture, domain specific domains [6]. For mature domains, the major architecture, web server. components and the relations between them have been studied extensively and are well understood [12]. For example, an operating system is understood to have 1. INTRODUCTION certain major subsystems such as a file system, a mem- ory manager, a process scheduler, a network interface, Research has shown the importance of having an archi- and an inter-process communication subsystem [19]. tecture document during the development of a software Similarly, a compiler is understood to have a scanner, system [15,17]. Such a document improves developers' parser, semantic analyzer and a code generator subsys- system understanding. It provides a building plan for tem [17]. Many of the relations between such subsys- the system and reduces its maintenance cost. It pro- tems are known and are expected to exist in the archi- vides an overview description of the system. It permits tecture of products in the same domain. For example in the developer to view the major subsystems in the soft- the architecture of a compiler, the scanner is expected ware system and the relations between them. Unfortu- to pass tokens to the parser. nately, many software systems do not have an architec- ture document. The cost of manually developing this Research has shown that a reference architecture en- server. The CNN web server locates the resource that ables software reuse and reduces the development ef- contains the daily news and sends the daily news back forts [9]. The different components of the reference to the browser, which displays it to the user. architecture provide a template for design and code reuse. Software architecture analysis methods such as Figure 1 shows the interaction between the web server SAAM [11] use a reference architecture to evaluate software and the rest of the environment. A web server alternative architectures. As new products are devel- is responsible for providing access to resources that are oped in new domains, the designers develop new sets of under control of the operating system. The most concepts and names. The comparison of architecture prominent web servers include Apache, StrongHold, alternatives in new domains is hampered by the lack of Netscape's iPlanet, and Microsoft's IIS web server [13]. consistency among concepts and terminology. A refer- The web server provides access to resources that range ence architecture provides a common nomenclature from static documents, such as HTML or text, to more across all software systems in the same domain, this dynamic resources, which are created by executing pro- allows the architectures of a set of products to be de- grams on the web server's machine. Java servlets and scribed uniformly. Such uniformity establishes a com- Common Gateway Interface (CGI) are some of the mon level of understanding and assists in comparing types of programs that are executed by web servers. the different architectures. The existence of a reference The clients accessing the web server are called brows- architecture is useful in the reverse engineering of a ers. Browsers' capabilities range from simple text ori- software system in the domain [18], by providing a set ented browser to graphically capable browsers. The of suggested subsystems and relations between them most prominent browsers include Netscape Navigator, that can be expected to exist in the investigated system. Internet Explorer, and Lynx. The web server domain is an emerging domain. The architecture of different web servers has not been stud- Browser ied extensively. Little has been published about the Network reference architecture for web servers. Luckily, three implementations of a web server are available online WEB under an open source license: Apache [3], AOLServer SERVER [2], and Jigsaw [10]. Developed by three different or- ganizations with distinct requirements, built using dif- Operating ferent development techniques, and with their source System code available online, these web servers are prime can- didates to study in the derivation of a reference archi- Resouces tecture. Using the architecture of these three servers and a modest amount of web server domain knowledge, Programs we developed a reference architecture for web server. servlet/ Files CGI We will present this reference architecture and will show how it is mapped to the architecture of each of the three web servers, to validate the derivation process. Figure 1: Web server in the network environment. 2. THE WEB BROWSER DOMAIN A web server can be thought of as the operating sys- tem's portal to the web. It provides a façade to the op- erating systems resources. It encapsulates the operating Web servers provide access to many features for users system and provides the requested resources to the such as daily news, email service, etc. A user needs a browser using the functionality of the local operating web browser to access these features. For example, system. Web servers have similar functionality, for when a user using his or her browser wants to check the example, all web servers can serve simple text files. daily news, he or she enters the Uniform Resource Lo- But each web server may have extra features based on cator (URL) for the document that contains the daily its design goals, for example, not all servers can serve news, such as http://www.cnn.com/index.html. Using Java servlets. The existence of a common set of fea- the HyperText Transfer Protocol (HTTP), the browser tures leads to the existence of a common reference ar- in turn requests the daily news from the CNN web chitecture for web servers. 3. DERIVING A REFERENCE Reference Architecure for Web Servers ARCHITECTURE Starting from the source code of three different web Conceptual Conceptual Conceptual servers and no architecture documentation, we derived Architecture Architecture Architecture a reference architecture for the web server domain. We are not web server domain experts, and we were not Concrete Concrete Concrete Architecture Architecture Architecture able to interview any of the developers of the systems. Instead, we used the defining artifact of these systems: Apache AOLServer Jigsaw their source code. Figure 2: Reference architecture derivation process. Kazman [11] describes a method to derive a reference The conceptual architecture shows the system's subsys- architecture for use in conducting the SAAM analysis. tems and the inter subsystem relations that are mean- Using a set of scenarios that represent the important ingful to the system's developers. As we were not able usages of the system, a domain expert traces the im- to interview the developers, we built the conceptual plementation of the scenarios and recovers a subset of architecture using available documentation and domain the reference architecture. Kazman [1] acknowledges knowledge that we acquired from using web serv- that the derived architecture is an incomplete reference ers/browsers and installing the Apache server. We used architecture, but it is sufficient for conducting the the Portable BookShelf (PBS) tool [13] to visualize and SAAM analysis. The derived reference architecture is validate each conceptual architecture. The PBS tool limited by the quality and the quantity of the chosen recovers the concrete architecture of the system from scenarios. the source code of the software system. The concrete architecture shows the actual relations between the dif- We will now present a process for deriving a reference ferent subsystems
Load more

Recommended publications
  • Server: Apache
    Modern Trends in Network Fingerprinting SecTor [11.21.07] Jay Graver Ryan Poppa // Fingerprinting Topics Why, What, Who & How? Tools in action Why Tools Break Tools EOL New Approaches New Tool // Why Fingerprint? WhiteHat needs accurate identification of hosts in a PenTest report BlackHat reconnaissance SysAdmins track down and identify new services or hosts when they appear on their network // What is a Fingerprint? Looking at something common … 192.168.2.187:8004 192.168.2.187 [152] 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d HTTP/1.1 200 OK. 0a 43 6f 6e 6e 65 63 74 69 6f 6e 3a 20 63 6c 6f .Connection: clo 73 65 0d 0a 41 6c 6c 6f 77 3a 20 4f 50 54 49 4f se..Allow: OPTIO 4e 53 2c 20 47 45 54 2c 20 48 45 41 44 2c 20 50 NS, GET, HEAD, P 4f 53 54 0d 0a 43 6f 6e 74 65 6e 74 2d 4c 65 6e OST..Content‐Len 67 74 68 3a 20 30 0d 0a 44 61 74 65 3a 20 46 72 gth: 0..Date: Fr 69 2c 20 30 32 20 4e 6f 76 20 32 30 30 37 20 32 i, 02 Nov 2007 2 32 3a 32 35 3a 31 38 20 47 4d 54 0d 0a 53 65 72 2:25:18 GMT..Ser 76 65 72 3a 20 6c 69 67 68 74 74 70 64 2f 31 2e ver: lighttpd/1. 34 2e 31 35 0d 0a 0d 0a 4.15...
    [Show full text]
  • Next Generation Web Scanning Presentation
    Next generation web scanning New Zealand: A case study First presented at KIWICON III 2009 By Andrew Horton aka urbanadventurer NZ Web Recon Goal: To scan all of New Zealand's web-space to see what's there. Requirements: – Targets – Scanning – Analysis Sounds easy, right? urbanadventurer (Andrew Horton) www.morningstarsecurity.com Targets urbanadventurer (Andrew Horton) www.morningstarsecurity.com Targets What does 'NZ web-space' mean? It could mean: •Geographically within NZ regardless of the TLD •The .nz TLD hosted anywhere •All of the above For this scan it means, IPs geographically within NZ urbanadventurer (Andrew Horton) www.morningstarsecurity.com Finding Targets We need creative methods to find targets urbanadventurer (Andrew Horton) www.morningstarsecurity.com DNS Zone Transfer urbanadventurer (Andrew Horton) www.morningstarsecurity.com Find IP addresses on IRC and by resolving lots of NZ websites 58.*.*.* 60.*.*.* 65.*.*.* 91.*.*.* 110.*.*.* 111.*.*.* 113.*.*.* 114.*.*.* 115.*.*.* 116.*.*.* 117.*.*.* 118.*.*.* 119.*.*.* 120.*.*.* 121.*.*.* 122.*.*.* 123.*.*.* 124.*.*.* 125.*.*.* 130.*.*.* 131.*.*.* 132.*.*.* 138.*.*.* 139.*.*.* 143.*.*.* 144.*.*.* 146.*.*.* 150.*.*.* 153.*.*.* 156.*.*.* 161.*.*.* 162.*.*.* 163.*.*.* 165.*.*.* 166.*.*.* 167.*.*.* 192.*.*.* 198.*.*.* 202.*.*.* 203.*.*.* 210.*.*.* 218.*.*.* 219.*.*.* 222.*.*.* 729,580,500 IPs. More than we want to try. urbanadventurer (Andrew Horton) www.morningstarsecurity.com IP address blocks in the IANA IPv4 Address Space Registry Prefix Designation Date Whois Status [1] -----
    [Show full text]
  • Learning Management System Technologies and Software Solutions for Online Teaching: Tools and Applications
    Learning Management System Technologies and Software Solutions for Online Teaching: Tools and Applications Yefim Kats Ellis University, USA & Rivier College, USA InformatIon scIence reference Hershey • New York Director of Editorial Content: Kristin Klinger Director of Book Publications: Julia Mosemann Acquisitions Editor: Lindsay Johnston Development Editor: Elizabeth Ardner Typesetter: Gregory Snader Production Editor: Jamie Snavely Cover Design: Lisa Tosheff Printed at: Yurchak Printing Inc. Published in the United States of America by Information Science Reference (an imprint of IGI Global) 701 E. Chocolate Avenue Hershey PA 17033 Tel: 717-533-8845 Fax: 717-533-8661 E-mail: [email protected] Web site: http://www.igi-global.com/reference Copyright © 2010 by IGI Global. All rights reserved. No part of this publication may be reproduced, stored or distributed in any form or by any means, electronic or mechanical, including photocopying, without written permission from the publisher. Product or company names used in this set are for identification purposes only. Inclusion of the names of the products or companies does not indicate a claim of ownership by IGI Global of the trademark or registered trademark. Library of Congress Cataloging-in-Publication Data Learning management system technologies and software solutions for online teaching : tools and applications / Yefim Kats, editor. p. cm. Includes bibliographical references and index. Summary: "This book gives a general coverage of learning management systems followed by a comparative analysis of the particular LMS products, review of technologies supporting different aspect of educational process, and, the best practices and methodologies for LMS-supported course delivery"--Provided by publisher. ISBN 978-1-61520-853-1 (hardcover) -- ISBN 978-1-61520-854-8 (ebook) 1.
    [Show full text]
  • Comparison of Web Server Software from Wikipedia, the Free Encyclopedia
    Create account Log in Article Talk Read Edit ViewM ohrisetory Search Comparison of web server software From Wikipedia, the free encyclopedia Main page This article is a comparison of web server software. Contents Featured content Contents [hide] Current events 1 Overview Random article 2 Features Donate to Wikipedia 3 Operating system support Wikimedia Shop 4 See also Interaction 5 References Help 6 External links About Wikipedia Community portal Recent changes Overview [edit] Contact page Tools Server Developed by Software license Last stable version Latest release date What links here AOLserver NaviSoft Mozilla 4.5.2 2012-09-19 Related changes Apache HTTP Server Apache Software Foundation Apache 2.4.10 2014-07-21 Upload file Special pages Apache Tomcat Apache Software Foundation Apache 7.0.53 2014-03-30 Permanent link Boa Paul Phillips GPL 0.94.13 2002-07-30 Page information Caudium The Caudium Group GPL 1.4.18 2012-02-24 Wikidata item Cite this page Cherokee HTTP Server Álvaro López Ortega GPL 1.2.103 2013-04-21 Hiawatha HTTP Server Hugo Leisink GPLv2 9.6 2014-06-01 Print/export Create a book HFS Rejetto GPL 2.2f 2009-02-17 Download as PDF IBM HTTP Server IBM Non-free proprietary 8.5.5 2013-06-14 Printable version Internet Information Services Microsoft Non-free proprietary 8.5 2013-09-09 Languages Jetty Eclipse Foundation Apache 9.1.4 2014-04-01 Čeština Jexus Bing Liu Non-free proprietary 5.5.2 2014-04-27 Galego Nederlands lighttpd Jan Kneschke (Incremental) BSD variant 1.4.35 2014-03-12 Português LiteSpeed Web Server LiteSpeed Technologies Non-free proprietary 4.2.3 2013-05-22 Русский Mongoose Cesanta Software GPLv2 / commercial 5.5 2014-10-28 中文 Edit links Monkey HTTP Server Monkey Software LGPLv2 1.5.1 2014-06-10 NaviServer Various Mozilla 1.1 4.99.6 2014-06-29 NCSA HTTPd Robert McCool Non-free proprietary 1.5.2a 1996 Nginx NGINX, Inc.
    [Show full text]
  • Linux WWW HOWTO Linux WWW HOWTO
    Linux WWW HOWTO Linux WWW HOWTO Table of Contents Linux WWW HOWTO .....................................................................................................................................1 by Mr. Poet, poet@linuxports.com..........................................................................................................1 1.Introduction...........................................................................................................................................1 2.Setting up WWW client software (Antiquated)....................................................................................1 3.Lynx......................................................................................................................................................1 4.Emacs−W3............................................................................................................................................1 5.Netscape Navigator/Communicator......................................................................................................1 6.Setting up WWW server systems.........................................................................................................2 7.Apache..................................................................................................................................................2 8.Web Server Add−ons............................................................................................................................2 9.Intranet Section.....................................................................................................................................2
    [Show full text]
  • Fortiweb 4.0 MR4 CLI Reference, 1St Edition
    CLI Reference for FortiWeb™ 4.0 MR4 Courtney Schwartz Contributors: George Csaba Martijn Duijm Patricia Siertsema Idan Soen Shiji Li Hao Xu Shiqiang Xu Forrest Zhang Contents Introduction ............................................................................................24 Scope ............................................................................................................................. 24 Conventions .................................................................................................................. 25 IP addresses............................................................................................................. 25 Cautions, notes, & tips.............................................................................................. 25 Typographic conventions.......................................................................................... 25 Command syntax...................................................................................................... 26 What’s new .............................................................................................28 Documentation changes .............................................................................................. 32 Using the CLI ..........................................................................................34 Connecting to the CLI................................................................................................... 34 Connecting to the CLI using a local console............................................................
    [Show full text]
  • Webdav a Network Protocol for Remote Collaborative Authoring on the Web E
    WebDAV A network protocol for remote collaborative authoring on the Web E. James Whitehead, Jr.† & Yaron Y. Goland‡ †Dept. of Info. and Computer Science, U.C. Irvine, USA, [email protected] ‡Microsoft Corporation, Redmond, WA, USA, [email protected] Abstract. Collaborative authoring tools generate network effects, where each tool’s value depends not just on the tool itself, but on the number of other people who also have compatible tools. We hypothesize that the best way to generate network effects and to add collaborative authoring capability to existing tools is to focus on the network protocol. This paper explores a protocol-centric approach to collaborative authoring by examining the requirements and functionality of the WebDAV protocol. Key features of the protocol are non- connection-oriented concurrency control, providing an upward migration path for existing non-collaborative applications, support for remote manipulation of the namespace of documents, and simultaneous satisfaction of a wide range of functional requirements. Introduction Despite many compelling research examples of collaborative authoring, so far their impact on actual authoring practice has been limited. While BSCW (Bentley et al., 1997) and HYPER-G (Maurer, 1996) have developed communities of use, electronic mail remains the dominant technology used for collaborative authoring, mainly due to its ubiquity. In order to perform collaborative authoring, all collaborators need to use compatible authoring tools—typically all collaborators use the same tools, tailor- made to support collaboration. To collaborate using PREP (Neuwirth et al., 1994), all collaborators need to use PREP, likewise for GROVE (Ellis et al., 1989) and DUPLEX (Pacull et al., 1994).
    [Show full text]
  • An Introduction to HTTP Fingerprinting Table of Contents
    An Introduction to HTTP fingerprinting Saumil Shah [email protected] 30th November, 2003 Table of Contents 1. Abstract 2. Theory of Fingerprinting 3. Banner Grabbing 4. Applications of HTTP Fingerprinting 5. Obfuscating the server banner string 6. Protocol Behaviour 6.1 HTTP Header field ordering 6.2 HTTP DELETE 6.3 Improper HTTP version response 6.3 Improper protocol response 6.5 Summary of test results 6.6 Choosing the right tests 7. Statistical and Fuzzy analysis 7.1 Assumptions 7.2 Terms and Definitions 7.3 Analysis Logic 8. httprint - the advanced HTTP fingerprinting engine 8.1 httprint signatures 8.2 httprint command line and GUI interfaces 8.3 Running httprint 8.4 The significance of confidence ratings 8.5 httprint Reports 8.6 Customising httprint 9. Trying to defeat HTTP Fingerprinting 10. Conclusion 11. References 1. Abstract HTTP Fingerprinting is a relatively new topic of discussion in the context of application security. One of the biggest challenges of maintaining a high level of network security is to have a complete and accurate inventory of networked assets. Web servers and web applications have now become a part of the scope of a network security assessment exercise. In this paper, we present techniques to identify various types of HTTP servers. We shall discuss some of the problems faced in inventorying HTTP servers and how we can overcome them. We shall also introduce and describe a tool, httprint, which is built using the concepts discussed in this paper. 2. Theory of Fingerprinting A fingerprint is defined as: 1. The impression of a fingertip on any surface; also: an ink impression of the lines upon the fingertip taken for the purpose of identification.
    [Show full text]
  • Software Libre Vs Software Propietario Ventajas Y Desventajas
    Software libre vs software propietario Ventajas y desventajas Culebro Ju´arez, Montserrat. G´omezHerrera, Wendy Guadalupe. Torres S´anchez, Susana. M´exico,Mayo 2006. ii ´Indice general Agradecimientos. VII Pr´ologo. IX Introducci´on. 1 1. Conceptos fundamentales sobre software. 3 1.1. Definici´onde software. 3 1.2. Definici´onde software libre. 3 1.3. Definici´onde software propietario. 4 1.3.1. Software propietario. 4 1.3.2. Objeciones al t´ermino “propietario”. 5 1.3.3. Software privativo. 5 1.3.4. Objeciones al t´ermino “privativo”. 5 1.3.5. Software no libre. 5 1.3.6. Objeciones al t´ermino “no libre”. 5 1.3.7. Software privado. 5 1.3.8. Objeciones al t´ermino “privado”. 6 1.3.9. Software con propietario. 6 1.3.10. Objeciones al t´ermino “con propietario”. 6 1.4. Software semilibre. 6 1.5. Freeware. 6 1.6. Shareware. 7 1.7. Abandonware. 7 1.8. Warez. 7 2. Visi´onhist´oricadel software. 9 2.1. La importancia del software. 9 2.2. Incursi´onde los hackers. 10 2.3. La cultura Unix. 10 2.4. GNU. 11 2.5. Libertad y costo. 12 2.6. Linux. 12 2.7. Open Source (c´odigoabierto). 14 2.8. El papel del software libre en el crecimiento de Internet. 14 2.9. Formatos abiertos. 15 2.10. Visi´onhist´oricadel Software propietario (Microsoft). 15 iii 3. Copyright, copyleft y patentes. 17 3.1. Copyright. 17 3.1.1. Derecho de autor y Copyright. 17 3.1.2. El contrato de copyright.
    [Show full text]
  • Migration from Windows to Linux for a Small Engineering Firm "A&G Associates"
    Rochester Institute of Technology RIT Scholar Works Theses 2004 Migration from Windows to Linux for a small engineering firm "A&G Associates" Trimbak Vohra Follow this and additional works at: https://scholarworks.rit.edu/theses Recommended Citation Vohra, Trimbak, "Migration from Windows to Linux for a small engineering firm A&G" Associates"" (2004). Thesis. Rochester Institute of Technology. Accessed from This Thesis is brought to you for free and open access by RIT Scholar Works. It has been accepted for inclusion in Theses by an authorized administrator of RIT Scholar Works. For more information, please contact [email protected]. Migration from Windows to Linux for a Small Engineering Firm "A&G Associates" (H ' _T ^^L. WBBmBmBBBBmb- Windows Linux by Trimbak Vohra Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Information Technology Rochester Institute of Technology B. Thomas Golisano College of Computing and Information Sciences Date: December 2, 2004 12/B2/28B2 14:46 5854752181 RIT INFORMATION TECH PAGE 02 Rochester Institute of Teehnology B. Thomas Golisano College of Computing and Information Sciences Master of Science in Information Technology Thesis Approval Form Student Name: Trimbak Vohra Thesis Title: Migration from Windows to Unux for a Small Engineeriog Firm "A&G Associates" Thesis Committee Name Signature Date Luther Troell luther IrQell, Ph.D ttL ",j7/Uy Chair G. L. Barido Prof. ~~orge Barido ? - Dec:. -cl7' Committee Member Thomas Oxford Mr. Thomas OxfocQ \ 2. L~( Q~ Committee Member Thesis Reproduction Permission Form Rochester Institute of Technology B. Thomas Golisano College of Computing and Information Sciences Master of Science in Information Technology Migration from Windows to Linux for a Small Engineering Firm "A&G Associates" I,Trimbak Vohra, hereby grant permission to the Wallace Library of the Rochester Institute of Technology to reproduce my thesis in whole or in part.
    [Show full text]
  • Alark Joshi Dept
    Alark Joshi Dept. of Diagnostic Radiology, Yale University Voice: (203) 737-5995 300 Cedar Street, TAC N138 E-mail: [email protected] New Haven, CT 06511 Website: www.cs.umbc.edu/˜alark1/ August 12th, 2008 RESEARCH INTERESTS Computer Graphics and Visualization. Primary interests and areas of expertise include volume visualiza- tion, non-photorealistic rendering and time-varying data visualization. EDUCATION February 2008 - Present Postdoctoral Associate. Department of Diagnostic Radiology, Yale University. “Novel visualization techniques for neurosurgical planning and stereotactic navigation” Advisor: Dr. Xenophon Papademetris. November 2007 Ph.D. Computer Science. University of Maryland Baltimore County. “Art-inspired techniques for visualizing time-varying data” Advisor: Dr. Penny Rheingans. December 2003 M. S. Computer Science. State University of New York at Stony Brook. “Innovative painterly rendering techniques using graphics hardware” Advisor: Dr. Klaus Mueller. July 2001 M.S. Computer Science. University of Minnesota Duluth. “Interactive Visualization of Models of Hyperbolic Geometry” Advisor: Dr. Douglas Dunham. June 1999 B.E. Engineering/Computer Science, University of Pune, India. EMPLOYMENT HISTORY 02/08 - Present Postdoctoral Associate Department of Diagnostic Radiology, Yale University - Working on identifying visualization techniques for visualizing vascular data. - Developing novel interaction techniques for neurosurgical planning and navigation. - Developing visualization and software tools for BioImage Suite, an open
    [Show full text]
  • Advanced Unix Maintenance Guide Outdated! the Contents of This Manual Are Not Relevant Anymore
    ]project-open[ V3.1 Advanced Unix Maintenance Guide Outdated! The contents of this manual are not relevant anymore. Please see the "PO-Unix-Simplified-Install- Guide" for Linux installation instructions. Frank Bergmann, V1.11, 2006-06-10 Outdated! The contents of this manual are not relevant anymore. Please see the "PO-Unix-Simplified-Install-Guide" for Linux installation instructions. INDEX 1 ABOUT THIS DOCUMENT.............................................................................. 4 1.1 VERSION ...............................................4 1.2 SCOPE .................................................4 1.3 AUDIENCE ..............................................4 1.4 VERSION HISTORY .........................................4 1.5 TODO’S................................................4 2 SYSTEM OVERVIEW ...................................................................................... 5 2.1 CONTEXT OVERVIEW ........................................5 2.2 OPERATION OVERVIEW ......................................6 2.3 ROLES AND RESPONSIBILITIES ................................7 3 BACKUP.......................................................................................................... 8 3.1 CONCEPT, TRADEOFFS AND DECISIONS...........................8 3.2 FULL BACKUP ............................................9 3.3 APPLICATION BACKUP ......................................9 3.4 DATABASE BACKUP .........................................9 4 FAILURE RECOVERY..................................................................................
    [Show full text]