Distributed File Systems for Unix
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Administering Unidata on UNIX Platforms
C:\Program Files\Adobe\FrameMaker8\UniData 7.2\7.2rebranded\ADMINUNIX\ADMINUNIXTITLE.fm March 5, 2010 1:34 pm Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta UniData Administering UniData on UNIX Platforms UDT-720-ADMU-1 C:\Program Files\Adobe\FrameMaker8\UniData 7.2\7.2rebranded\ADMINUNIX\ADMINUNIXTITLE.fm March 5, 2010 1:34 pm Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Beta Notices Edition Publication date: July, 2008 Book number: UDT-720-ADMU-1 Product version: UniData 7.2 Copyright © Rocket Software, Inc. 1988-2010. All Rights Reserved. Trademarks The following trademarks appear in this publication: Trademark Trademark Owner Rocket Software™ Rocket Software, Inc. Dynamic Connect® Rocket Software, Inc. RedBack® Rocket Software, Inc. SystemBuilder™ Rocket Software, Inc. UniData® Rocket Software, Inc. UniVerse™ Rocket Software, Inc. U2™ Rocket Software, Inc. U2.NET™ Rocket Software, Inc. U2 Web Development Environment™ Rocket Software, Inc. wIntegrate® Rocket Software, Inc. Microsoft® .NET Microsoft Corporation Microsoft® Office Excel®, Outlook®, Word Microsoft Corporation Windows® Microsoft Corporation Windows® 7 Microsoft Corporation Windows Vista® Microsoft Corporation Java™ and all Java-based trademarks and logos Sun Microsystems, Inc. UNIX® X/Open Company Limited ii SB/XA Getting Started The above trademarks are property of the specified companies in the United States, other countries, or both. All other products or services mentioned in this document may be covered by the trademarks, service marks, or product names as designated by the companies who own or market them. License agreement This software and the associated documentation are proprietary and confidential to Rocket Software, Inc., are furnished under license, and may be used and copied only in accordance with the terms of such license and with the inclusion of the copyright notice. -
802.11N Support in Freebsd (For the Run(4) Driver)
802.11n support in FreeBSD (for the run(4) driver) 15412 F’19 1 / 15 Motivation ● “Do something with operating systems” – OS Junkie: Ubuntu → Fedora → Arch Linux → Gentoo → FreeBSD ● Do something for the community – So much free (not free as in free beer) software out there for use – Time to give something back! ● Faster WiFi doesn’t hurt – Makes FreeBSD more usable ● Less angry users: “But this works on Lunix!” 2 / 15 FreeBSD ● Open source, UNIX ● Official webpage: freebsd.org ● Large, helpful community – IRC Channels on Freenode (#freebsd) – Forums (forums.freebsd.org) – Mailing lists (lists.freebsd.org) ● Latest Release: FreeBSD 12 (2018) 3 / 15 802.11 ● IEEE 802.11: Standard for WiFi – 802.11b: 2.4GHz, Max rate 11 Mbps, range 150 ft., Year 1999 – 802.11g: 2.4 GHz, Max rate 54 Mbps, range 150 ft., Year 2003 – 802.11n: 2.4GHz or 5 GHz, Max rate 300 Mbps (single antenna), 450 Mbps (MIMO), range 175 ft., Year 2009 4 / 15 Ralink ● Produces WiFi chips – See https://wikidevi.com/wiki/Ralink for list of chips ● Linux driver: rt2800usb (USB Ralink 802.11n devices) ( https://wiki.debian.org/rt2800usb). ● FreeBSD driver: run (see https://www.freebsd.org/cgi/man.cgi?run(4) ) – Caveats : “The run driver does not support any of the 802.11n capabilities offered by the RT2800, RT3000 and RT3900 chipsets.“ 5 / 15 Existing code base ● The run driver supports several chipsets and adapters (such as ASUS USB N-66) but without support for 802.11n – This means reduced speeds – This means it will misbehave when you turn on your microwave ● run(4) also has annoying ‘device timeout’ errors where the card stops responding. -
Tutorials Point, Simply Easy Learning
Tutorials Point, Simply Easy Learning UML Tutorial Tutorialspoint.com UNIX is a computer Operating System which is capable of handling activities from multiple users at the same time. Unix was originated around in 1969 at AT&T Bell Labs by Ken Thompson and Dennis Ritchie. This tutorial gives an initial push to start you with UNIX. For more detail kindly check tutorialspoint.com/unix What is Unix ? The UNIX operating system is a set of programs that act as a link between the computer and the user. The computer programs that allocate the system resources and coordinate all the details of the computer's internals is called the operating system or kernel. Users communicate with the kernel through a program known as the shell. The shell is a command line interpreter; it translates commands entered by the user and converts them into a language that is understood by the kernel. Unix was originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Douglas McIlroy, and Joe Ossanna. There are various Unix variants available in the market. Solaris Unix, AIX, UP Unix and BSD are few examples. Linux is also a flavour of Unix which is freely available. Several people can use a UNIX computer at the same time; hence UNIX is called a multiuser system. A user can also run multiple programs at the same time; hence UNIX is called multitasking. Unix Architecture: Here is a basic block diagram of a UNIX system: 1 | P a g e Tutorials Point, Simply Easy Learning The main concept that unites all versions of UNIX is the following four basics: Kernel: The kernel is the heart of the operating system. -
Package 'Filelock'
Package ‘filelock’ October 5, 2018 Title Portable File Locking Version 1.0.2 Author Gábor Csárdi Maintainer Gábor Csárdi <[email protected]> Description Place an exclusive or shared lock on a file. It uses 'LockFile' on Windows and 'fcntl' locks on Unix-like systems. License MIT + file LICENSE LazyData true URL https://github.com/r-lib/filelock#readme BugReports https://github.com/r-lib/filelock/issues RoxygenNote 6.0.1.9000 Suggests callr (>= 2.0.0), covr, testthat Encoding UTF-8 NeedsCompilation yes Repository CRAN Date/Publication 2018-10-05 10:30:12 UTC R topics documented: lock .............................................2 Index 5 1 2 lock lock Advisory File Locking and Unlocking Description There are two kinds of locks, exclusive and shared, see the exclusive argument and other details below. Usage lock(path, exclusive = TRUE, timeout = Inf) unlock(lock) Arguments path Path to the file to lock. If the file does not exist, it will be created, but the directory of the file must exist. Do not place the lock on a file that you want to read from or write to! *Always use a special lock file. See details below. exclusive Whether to acquire an exclusive lock. An exclusive lock gives the process ex- clusive access to the file, no other processes can place any kind of lock on it. A non-exclusive lock is a shared lock. Multiple processes can hold a shared lock on the same file. A process that writes to a file typically requests an exclusive lock, and a process that reads from it typically requests a shared lock. -
Unit V Algorithm for Booting the UNIX System
Unit V Algorithm for booting the UNIX system : As we’ve noted, the boot process begins when the instructions stored in the computer’s permanent, nonvolatile memory (referred to colloquially as the BIOS, ROM,NVRAM, and so on) are executed. This storage location for the initial boot instructions is generically referred to as firmware (in contrast to “software,” but reflecting the fact that the instructions constitute a program[2]). These instructions are executed automatically when the power is turned on or the system is reset, although the exact sequence of events may vary according to the values of stored parameters.[3] The firmware instructions may also begin executing in response to a command entered on the system console (as we’ll see in a bit). However they are initiated, these instructions are used to locate and start up the system’s boot program , which in turn starts the Unix operating system. The boot program is stored in a standard location on a bootable device. For a normal boot from disk, for example, the boot program might be located in block 0 of the root disk or, less commonly, in a special partition on the root disk. In the same way, the boot program may be the second file on a bootable tape or in a designated location on a remote file server in the case of a network boot of a diskless workstation. There is usually more than one bootable device on a system. The firmware program may include logic for selecting the device to boot from, often in the form of a list of potential devices to examine. -
Mac OS X for UNIX Users the Power of UNIX with the Simplicity of Macintosh
Mac OS X for UNIX Users The power of UNIX with the simplicity of Macintosh. Features Mac OS X version 10.3 “Panther” combines a robust and open UNIX-based foundation with the richness and usability of the Macintosh interface, bringing UNIX technology Open source, standards-based UNIX to the mass market. Apple has made open source and standards a key part of its foundation strategy and delivers an operating system built on a powerful UNIX-based foundation •Based on FreeBSD 5 and Mach 3.0 • Support for POSIX, Linux, and System V APIs that is innovative and easy to use. • High-performance math libraries, including There are over 8.5 million Mac OS X users, including scientists, animators, developers, vector/DSP and PowerPC G5 support and system administrators, making Mac OS X the most widely used UNIX-based desktop • Optimized X11 window server for UNIX GUIs operating system. In addition, Mac OS X is the only UNIX-based environment that •Open source code available via the natively runs Microsoft Office, Adobe Photoshop, and thousands of other consumer Darwin project applications—all side by side with traditional command-line, X11, and Java applications. Standards-based networking For notebook computer users, Mac OS X delivers full power management and mobility •Open source TCP/IP-based networking support for Apple’s award-winning PowerBook G4. architecture, including IPv4, IPv6, and L2TP/IPSec •Interoperability with NFS, AFP, and Windows (SMB/CIFS) file servers •Powerful web server (Apache) •Open Directory 2, an LDAP-based directory services -
Managing Network File Systems in Oracle® Solaris 11.4
Managing Network File Systems in ® Oracle Solaris 11.4 Part No: E61004 August 2021 Managing Network File Systems in Oracle Solaris 11.4 Part No: E61004 Copyright © 2002, 2021, Oracle and/or its affiliates. This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. If this is software or related documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, then the following notice is applicable: U.S. GOVERNMENT END USERS: Oracle programs (including any operating system, integrated software, any programs embedded, installed or activated on delivered hardware, and modifications of such programs) and Oracle computer documentation or other Oracle data delivered to or accessed by U.S. Government end users are "commercial computer software" or "commercial computer software documentation" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, the use, reproduction, duplication, release, display, disclosure, modification, preparation of derivative works, and/or adaptation of i) Oracle programs (including any operating system, integrated software, any programs embedded, installed or activated on delivered hardware, and modifications of such programs), ii) Oracle computer documentation and/or iii) other Oracle data, is subject to the rights and limitations specified in the license contained in the applicable contract. -
Thread Scheduling in Multi-Core Operating Systems Redha Gouicem
Thread Scheduling in Multi-core Operating Systems Redha Gouicem To cite this version: Redha Gouicem. Thread Scheduling in Multi-core Operating Systems. Computer Science [cs]. Sor- bonne Université, 2020. English. tel-02977242 HAL Id: tel-02977242 https://hal.archives-ouvertes.fr/tel-02977242 Submitted on 24 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Ph.D thesis in Computer Science Thread Scheduling in Multi-core Operating Systems How to Understand, Improve and Fix your Scheduler Redha GOUICEM Sorbonne Université Laboratoire d’Informatique de Paris 6 Inria Whisper Team PH.D.DEFENSE: 23 October 2020, Paris, France JURYMEMBERS: Mr. Pascal Felber, Full Professor, Université de Neuchâtel Reviewer Mr. Vivien Quéma, Full Professor, Grenoble INP (ENSIMAG) Reviewer Mr. Rachid Guerraoui, Full Professor, École Polytechnique Fédérale de Lausanne Examiner Ms. Karine Heydemann, Associate Professor, Sorbonne Université Examiner Mr. Etienne Rivière, Full Professor, University of Louvain Examiner Mr. Gilles Muller, Senior Research Scientist, Inria Advisor Mr. Julien Sopena, Associate Professor, Sorbonne Université Advisor ABSTRACT In this thesis, we address the problem of schedulers for multi-core architectures from several perspectives: design (simplicity and correct- ness), performance improvement and the development of application- specific schedulers. -
Embedded Systems Supporting by Different Operating Systems
A Survey: Embedded Systems Supporting By Different Operating Systems Qamar Jabeen, Fazlullah Khan, Muhammad Tahir, Shahzad Khan, Syed Roohullah Jan Department of Computer Science, Abdul Wali Khan University Mardan [email protected], [email protected] -------------------------------------------------------------------------------------------------------------------------------------- Abstract: In these days embedded systems used in industrial, commercial system have an important role in different areas. e.g Mobile Phones and different Fields and applications like Network type of Network Bridges are embedded embedded system , Real-time embedded used by telecommunication systems for systems which supports the mission- giving better requirements to their users. critical domains, mostly having the time We use digital cameras, MP3 players, DVD constraints, Stand-alone systems which players are the example of embedded includes the network router etc. A great consumer electronics. In our daily life its deployment in the processors made for provided us efficiency and flexibility and completing the demanding needs of the many features which includes microwave users. There is also a large-scale oven, washing machines dishwashers. deployment occurs in sensor networks for Embedded system are also used in providing the advance facilities, for medical, transportation and also used in handled such type of embedded systems wireless sensor network area respectively a specific operating system must provide. medical imaging, vital signs, automobile This paper presents some software electric vehicles and Wi-Fi modules. infrastructures that have the ability of supporting such types of embedded systems. 1. Introduction: Embedded system are computer systems designed for specific purpose, to increase functionality and reliability for achieving a specific task, like general Figure 1: Taxonomy of Embedded Software’s purpose computer system it does not use for multiple tasks. -
Portalocker Documentation Release 2.3.2
Portalocker Documentation Release 2.3.2 Rick van Hattem Aug 27, 2021 CONTENTS 1 portalocker - Cross-platform locking library1 1.1 Overview.................................................1 1.2 Redis Locks...............................................1 1.3 Python 2.................................................2 1.4 Tips....................................................2 1.5 Links...................................................2 1.6 Examples.................................................3 1.7 Versioning................................................4 1.8 Changelog................................................4 1.9 License..................................................4 1.9.1 portalocker package.......................................4 1.9.1.1 Submodules......................................4 1.9.1.2 Module contents....................................9 1.9.2 tests package.......................................... 13 1.9.2.1 Module contents.................................... 13 1.9.3 License............................................. 13 2 Indices and tables 15 Python Module Index 17 Index 19 i ii CHAPTER ONE PORTALOCKER - CROSS-PLATFORM LOCKING LIBRARY 1.1 Overview Portalocker is a library to provide an easy API to file locking. An important detail to note is that on Linux and Unix systems the locks are advisory by default. By specifying the -o mand option to the mount command it is possible to enable mandatory file locking on Linux. This is generally not recommended however. For more information about the subject: • https://en.wikipedia.org/wiki/File_locking -
Cgatools Install Guide
cgatools Installation Guide Version 1.2.0 Complete Genomics data is for Research Use Only and not for use in the treatment or diagnosis of any human subject. Information, descriptions and specifications in this publication are subject to change without notice. Copyright © 2010 Complete Genomics Incorporated. All rights reserved. cgatools Installation Guide Table Of Contents Table Of Contents Preface ........................................................................................................................................................................... 3 Conventions ................................................................................................................................................................................ 3 cgatools Documents ................................................................................................................................................................ 3 References ................................................................................................................................................................................... 3 Overview and Requirements ................................................................................................................................. 5 Install Process in a Nutshell ................................................................................................................................................. 5 User Requirements ................................................................................................................................................................. -
Real-Time Audio Servers on BSD Unix Derivatives
Juha Erkkilä Real-Time Audio Servers on BSD Unix Derivatives Master's Thesis in Information Technology June 17, 2005 University of Jyväskylä Department of Mathematical Information Technology Jyväskylä Author: Juha Erkkilä Contact information: [email protected].fi Title: Real-Time Audio Servers on BSD Unix Derivatives Työn nimi: Reaaliaikaiset äänipalvelinsovellukset BSD Unix -johdannaisjärjestelmissä Project: Master's Thesis in Information Technology Page count: 146 Abstract: This paper covers real-time and interprocess communication features of 4.4BSD Unix derived operating systems, and especially their applicability for real- time audio servers. The research ground of bringing real-time properties to tradi- tional Unix operating systems (such as 4.4BSD) is covered. Included are some design ideas used in BSD-variants, such as using multithreaded kernels, and schedulers that can provide real-time guarantees to processes. Factors affecting the design of real- time audio servers are considered, especially the suitability of various interprocess communication facilities as mechanisms to pass audio data between applications. To test these mechanisms on a real operating system, an audio server and a client utilizing these techniques is written and tested on an OpenBSD operating system. The performance of the audio server and OpenBSD is analyzed, with attempts to identify some bottlenecks of real-time operation in the OpenBSD system. Suomenkielinen tiivistelmä: Tämä tutkielma kattaa reaaliaikaisuus- ja prosessien väliset kommunikaatio-ominaisuudet, keskittyen 4.4BSD Unix -johdannaisiin käyt- töjärjestelmiin, ja erityisesti siihen kuinka hyvin nämä soveltuvat reaaliaikaisille äänipalvelinsovelluksille. Tutkimusalueeseen sisältyy reaaliaikaisuusominaisuuk- sien tuominen perinteisiin Unix-käyttöjärjestelmiin (kuten 4.4BSD:hen). Mukana on suunnitteluideoita, joita on käytetty joissakin BSD-varianteissa, kuten säikeis- tetyt kernelit, ja skedulerit, jotka voivat tarjota reaaliaikaisuustakeita prosesseille.