Design, Implementation and Evaluation of a Storage System for Delay-Tolerant Networks
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High Velocity Kernel File Systems with Bento
High Velocity Kernel File Systems with Bento Samantha Miller, Kaiyuan Zhang, Mengqi Chen, and Ryan Jennings, University of Washington; Ang Chen, Rice University; Danyang Zhuo, Duke University; Thomas Anderson, University of Washington https://www.usenix.org/conference/fast21/presentation/miller This paper is included in the Proceedings of the 19th USENIX Conference on File and Storage Technologies. February 23–25, 2021 978-1-939133-20-5 Open access to the Proceedings of the 19th USENIX Conference on File and Storage Technologies is sponsored by USENIX. High Velocity Kernel File Systems with Bento Samantha Miller Kaiyuan Zhang Mengqi Chen Ryan Jennings Ang Chen‡ Danyang Zhuo† Thomas Anderson University of Washington †Duke University ‡Rice University Abstract kernel-level debuggers and kernel testing frameworks makes this worse. The restricted and different kernel programming High development velocity is critical for modern systems. environment also limits the number of trained developers. This is especially true for Linux file systems which are seeing Finally, upgrading a kernel module requires either rebooting increased pressure from new storage devices and new demands the machine or restarting the relevant module, either way on storage systems. However, high velocity Linux kernel rendering the machine unavailable during the upgrade. In the development is challenging due to the ease of introducing cloud setting, this forces kernel upgrades to be batched to meet bugs, the difficulty of testing and debugging, and the lack of cloud-level availability goals. support for redeployment without service disruption. Existing Slow development cycles are a particular problem for file approaches to high-velocity development of file systems for systems. -
Synthesiology”, a New Academic Journal
MESSAGES FROM THE EDITORIAL BOARD There has been a wide gap between science and society. The last three hundred years of the history of modern science indicates to us that many research results disappeared or took a long time to become useful to society. Due to the difficulties of bridging this gap, it has been recently called the valley of death or the nightmare stage (Note 1). Rather than passively waiting, therefore, researchers and engineers who understand the potential of the research should be active. To bridge the gap, technology integration (i.e. Type 2 Basic Research − Note 2) of scientific findings for utilizing them in society, in addition to analytical research, has been one of the wheels of progress (i.e. Full Research − Note 3). Traditional journals, have been collecting much analytical type knowledge that is factual knowledge and establishing many scientific disciplines (i.e. Type 1 Basic Research − Note 4). Technology integration research activities, on the other hand, have been kept as personal know-how. They have not been formalized as universal knowledge of what ought to be done. As there must be common theories, principles, and practices in the methodologies of technology integration, we regard it as basic research. This is the reason why we have decided to publish “Synthesiology”, a new academic journal. Synthesiology is a coined word combining “synthesis” and “ology”. Synthesis which has its origin in Greek means integration. Ology is a suffix attached to scientific disciplines. Each paper in this journal will present scenarios selected for their societal value, identify elemental knowledge and/or technologies to be integrated, and describe the procedures and processes to achieve this goal. -
Comparison of Kernel and User Space File Systems
Comparison of kernel and user space file systems — Bachelor Thesis — Arbeitsbereich Wissenschaftliches Rechnen Fachbereich Informatik Fakultät für Mathematik, Informatik und Naturwissenschaften Universität Hamburg Vorgelegt von: Kira Isabel Duwe E-Mail-Adresse: [email protected] Matrikelnummer: 6225091 Studiengang: Informatik Erstgutachter: Professor Dr. Thomas Ludwig Zweitgutachter: Professor Dr. Norbert Ritter Betreuer: Michael Kuhn Hamburg, den 28. August 2014 Abstract A file system is part of the operating system and defines an interface between OS and the computer’s storage devices. It is used to control how the computer names, stores and basically organises the files and directories. Due to many different requirements, such as efficient usage of the storage, a grand variety of approaches arose. The most important ones are running in the kernel as this has been the only way for a long time. In 1994, developers came up with an idea which would allow mounting a file system in the user space. The FUSE (Filesystem in Userspace) project was started in 2004 and implemented in the Linux kernel by 2005. This provides the opportunity for a user to write an own file system without editing the kernel code and therefore avoid licence problems. Additionally, FUSE offers a stable library interface. It is originally implemented as a loadable kernel module. Due to its design, all operations have to pass through the kernel multiple times. The additional data transfer and the context switches are causing some overhead which will be analysed in this thesis. So, there will be a basic overview about on how exactly a file system operation takes place and which mount options for a FUSE-based system result in a better performance. -
Which Wiki for Which Uses
Which wiki for which uses There are over 120 Wiki software available to set up a wiki plateform. Those listed below are the 13 more popular (by alphabetic order) wiki engines as listed on http://wikimatrix.org on the 16th of March 2012. The software license decides on what conditions a certain software may be used. Among other things, the software license decide conditions to run, study the code, modify the code and redistribute copies or modified copies of the software. Wiki software are available either hosted on a wiki farm or downloadable to be installed locally. Wiki software Reference Languages Wikifarm Technology Licence Main audience Additional notes name organization available available very frequently met in corporate environment. Arguably the most widely deployed wiki software in the entreprise market. A zero- Confluence Atlassian Java proprietary 11 confluence entreprise cost license program is available for non-profit organizations and open source projects aimed at small companies’ documentation needs. It works on plain DokuWiki several companies Php GPL2 50 small companies text files and thus needs no database. DrupalWiki Kontextwork.de Php GPL2+ 12 entreprise DrupalWiki is intended for enterprise use Entreprise wiki. Foswiki is a wiki + structured data + Foswiki community Perl GPL2 22 entreprise programmable pages education, public Wikimedia Php with backend MediaWiki is probably the best known wiki software as it is the MediaWiki GPLv2+ >300 wikia and many hostingservice, companies private Foundation and others database one used by Wikipedia. May support very large communities knowledge-based site MindTouchTCS MindTouch Inc. Php proprietary 26 SamePage partly opensource and partly proprietary extensions Jürgen Hermann & Python with flat tech savy MoinMoin GPL2 10+ ourproject.org Rather intended for small to middle size workgroup. -
Biodynamo: a New Platform for Large-Scale Biological Simulation
Lukas Johannes Breitwieser, BSc BioDynaMo: A New Platform for Large-Scale Biological Simulation MASTER’S THESIS to achieve the university degree of Diplom-Ingenieur Master’s degree programme Software Engineering and Management submitted to Graz University of Technology Supervisor Ass.Prof. Dipl.-Ing. Dr.techn. Christian Steger Institute for Technical Informatics Advisor Ass.Prof. Dipl.-Ing. Dr.techn. Christian Steger Dr. Fons Rademakers (CERN) November 23, 2016 AFFIDAVIT I declare that I have authored this thesis independently, that I have not used other than the declared sources/resources, and that I have explicitly indicated all ma- terial which has been quoted either literally or by content from the sources used. The text document uploaded to TUGRAZonline is identical to the present master‘s thesis. Date Signature This thesis is dedicated to my parents Monika and Fritz Breitwieser Without their endless love, support and encouragement I would not be where I am today. iii Acknowledgment This thesis would not have been possible without the support of a number of people. I want to thank my supervisor Christian Steger for his guidance, support, and input throughout the creation of this document. Furthermore, I would like to express my deep gratitude towards the entire CERN openlab team, Alberto Di Meglio, Marco Manca and Fons Rademakers for giving me the opportunity to work on this intriguing project. Furthermore, I would like to thank them for vivid discussions, their valuable feedback, scientific freedom and possibility to grow. My gratitude is extended to Roman Bauer from Newcastle University (UK) for his helpful insights about computational biology detailed explanations and valuable feedback. -
Emacs-W3m User's Manual
This file documents emacs-w3m, an Emacs interface tow3m. This edition is for emacs-w3m version 1.4.567. Emacs-w3m User's Manual An Emacs interface to w3m for emacs-w3m version 1.4.567 The emacs-w3m development team Copyright c 2000-2014 TSUCHIYA Masatoshi Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any later version published by the Free Software Foundation. This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABIL- ITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this document; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. i Table of Contents Emacs-w3m User's Manual :::::::::::::::::::::::: 1 1 Preliminary remarks:::::::::::::::::::::::::::: 2 2 It's so easy to begin to use emacs-w3m ::::::: 3 2.1 What version of Emacs can be used? ::::::::::::::::::::::::::: 3 2.2 Using w3m: the reason why emacs-w3m is fast:::::::::::::::::: 3 2.3 Things required to run emacs-w3m ::::::::::::::::::::::::::::: 3 2.4 Installing emacs-w3m :::::::::::::::::::::::::::::::::::::::::: 5 2.5 Installing on non-UNIX-like systems :::::::::::::::::::::::::::: 6 2.6 Minimal settings to run emacs-w3m :::::::::::::::::::::::::::: 7 3 Basic usage :::::::::::::::::::::::::::::::::::::: 8 -
Software Defined Storage Overview
Software Defined Storage Overview August 2019 Juan Jose Floristan Cloud Specialist Solution Architect 1 AGENDA 1. Why Red Hat Storage? 2. Red Hat Ceph Storage 3. Red Hat Gluster Storage 4. Red Hat Openshift Container Storage 2 Why Red Hat Storage? 3 Why Red Hat Storage? STORAGE IS EVOLVING TRADITIONAL STORAGE OPEN, SOFTWARE-DEFINED STORAGE Complex proprietary silos Standardized, unified, open platforms USER USER USER USER ADMIN Control Plane (API, GUI) ADMIN ADMIN ADMIN Software Ceph Gluster +++ Open Source Custom GUI Custom GUI Custom GUI Proprietary Hardware Proprietary Hardware Proprietary Hardware Standard Computers and Disks Proprietary Proprietary Proprietary Standard Hardware Software Software Software 4 Why Red Hat Storage? WHY THIS MATTERS PROPRIETARY Common, Lower cost, standardized supply chain HARDWARE off-the-shelf hardware SCALE-UP Scale-out Increased operational flexibility ARCHITECTURE architecture HARDWARE-BASED Software-based More programmability, agility, INTELLIGENCE intelligence and control CLOSED DEVELOPMENT Open development More flexible, well-integrated PROCESS process technology 5 Why Red Hat Storage? A RISING TIDE Software-Defined Storage is leading SDS-P MARKET SIZE BY SEGMENT $1,395M a shift in the global storage industry, Block Storage File Storage $1,195M with far-reaching effects. Object Storage $1,029M Hyperconverged “By 2020, between 70%-80% of unstructured $859M data will be held on lower-cost storage managed $705M $592M by SDS.” $475M Innovation Insight: Separating Hype From Hope for Software-Defined Storage “By 2019, 70% of existing storage array products will also be available as software-only versions.” 2013 2014 2015 2016 2017 2018 Innovation Insight: Separating Hype From Hope for Software-Defined Storage 2019 Source: IDC 6 Why Red Hat Storage? THE RED HAT STORAGE MISSION To offer a unified, open software-defined storage portfolio that delivers a range of data services for next generation workloads, thereby accelerating the transition to modern IT infrastructures. -
Pipenightdreams Osgcal-Doc Mumudvb Mpg123-Alsa Tbb
pipenightdreams osgcal-doc mumudvb mpg123-alsa tbb-examples libgammu4-dbg gcc-4.1-doc snort-rules-default davical cutmp3 libevolution5.0-cil aspell-am python-gobject-doc openoffice.org-l10n-mn libc6-xen xserver-xorg trophy-data t38modem pioneers-console libnb-platform10-java libgtkglext1-ruby libboost-wave1.39-dev drgenius bfbtester libchromexvmcpro1 isdnutils-xtools ubuntuone-client openoffice.org2-math openoffice.org-l10n-lt lsb-cxx-ia32 kdeartwork-emoticons-kde4 wmpuzzle trafshow python-plplot lx-gdb link-monitor-applet libscm-dev liblog-agent-logger-perl libccrtp-doc libclass-throwable-perl kde-i18n-csb jack-jconv hamradio-menus coinor-libvol-doc msx-emulator bitbake nabi language-pack-gnome-zh libpaperg popularity-contest xracer-tools xfont-nexus opendrim-lmp-baseserver libvorbisfile-ruby liblinebreak-doc libgfcui-2.0-0c2a-dbg libblacs-mpi-dev dict-freedict-spa-eng blender-ogrexml aspell-da x11-apps openoffice.org-l10n-lv openoffice.org-l10n-nl pnmtopng libodbcinstq1 libhsqldb-java-doc libmono-addins-gui0.2-cil sg3-utils linux-backports-modules-alsa-2.6.31-19-generic yorick-yeti-gsl python-pymssql plasma-widget-cpuload mcpp gpsim-lcd cl-csv libhtml-clean-perl asterisk-dbg apt-dater-dbg libgnome-mag1-dev language-pack-gnome-yo python-crypto svn-autoreleasedeb sugar-terminal-activity mii-diag maria-doc libplexus-component-api-java-doc libhugs-hgl-bundled libchipcard-libgwenhywfar47-plugins libghc6-random-dev freefem3d ezmlm cakephp-scripts aspell-ar ara-byte not+sparc openoffice.org-l10n-nn linux-backports-modules-karmic-generic-pae -
Index Images Download 2006 News Crack Serial Warez Full 12 Contact
index images download 2006 news crack serial warez full 12 contact about search spacer privacy 11 logo blog new 10 cgi-bin faq rss home img default 2005 products sitemap archives 1 09 links 01 08 06 2 07 login articles support 05 keygen article 04 03 help events archive 02 register en forum software downloads 3 security 13 category 4 content 14 main 15 press media templates services icons resources info profile 16 2004 18 docs contactus files features html 20 21 5 22 page 6 misc 19 partners 24 terms 2007 23 17 i 27 top 26 9 legal 30 banners xml 29 28 7 tools projects 25 0 user feed themes linux forums jobs business 8 video email books banner reviews view graphics research feedback pdf print ads modules 2003 company blank pub games copyright common site comments people aboutus product sports logos buttons english story image uploads 31 subscribe blogs atom gallery newsletter stats careers music pages publications technology calendar stories photos papers community data history arrow submit www s web library wiki header education go internet b in advertise spam a nav mail users Images members topics disclaimer store clear feeds c awards 2002 Default general pics dir signup solutions map News public doc de weblog index2 shop contacts fr homepage travel button pixel list viewtopic documents overview tips adclick contact_us movies wp-content catalog us p staff hardware wireless global screenshots apps online version directory mobile other advertising tech welcome admin t policy faqs link 2001 training releases space member static join health -
Lamassu: Storage-Efficient Host-Side Encryption
Lamassu: Storage-Efficient Host-Side Encryption Peter Shah and Won So NetApp Inc. Abstract moves downstream through the stack. This strategy can Many storage customers are adopting encryption solu- take many forms, such as built-in application encryption, tions to protect critical data. Most existing encryption OS-based file system encryption or VM-level encryp- solutions sit in, or near, the application that is the source tion [3, 19, 22]. We term any encryption that runs on of critical data, upstream of the primary storage system. the same physical hardware as the primary application Placing encryption near the source ensures that data re- data-source encryption. mains encrypted throughout the storage stack, making it In general, existing data-source encryption solutions easier to use untrusted storage, such as public clouds. interfere with content-driven data management features Unfortunately, such a strategy also prevents down- provided by storage systems — in particular, deduplica- stream storage systems from applying content-based fea- tion. If a storage controller does not have access to the tures, such as deduplication, to the data. In this paper, we keys used to secure data, it cannot compare the contents present Lamassu, an encryption solution that uses block- of encrypted data to determine which sections, if any, are oriented, host-based, convergent encryption to secure duplicates. data, while preserving storage-based data deduplication. In this paper, we present an alternative encryption Unlike past convergent encryption systems, which typi- strategy that provides the benefits of upstream encryp- cally store encryption metadata in a dedicated store, our tion while preserving storage-based data deduplication system transparently inserts its metadata into each file’s on downstream storage. -
Open Technology Development (OTD): Lessons Learned & Best Practices for Military Software
2011 OTD Lessons Learned Open Technology Development (OTD): Lessons Learned & Best Practices for Military Software 2011-05-16 Sponsored by the Assistant Secretary of Defense (Networks & Information Integration) (NII) / DoD Chief Information Officer (CIO) and the Under Secretary of Defense for Acquisition, Technology, and Logistics (AT&L) This document is released under the Creative Commons Attribution ShareAlike 3.0 (CC- BY-SA) License. You are free to share (to copy, distribute and transmit the work) and to remix (to adapt the work), under the condition of attribution (you must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work)). For more information, see http://creativecommons.org/licenses/by/3.0/ . The U.S. government has unlimited rights to this document per DFARS 252.227-7013. Portions of this document were originally published in the Software Tech News, Vol.14, No.1, January 2011. See https://softwaretechnews.thedacs.com/ for more information. Version - 1.0 2 2011 OTD Lessons Learned Table of Contents Chapter 1. Introduction........................................................................................................................... 1 1.1 Software is a Renewable Military Resource ................................................................................ 1 1.2 What is Open Technology Development (OTD) ......................................................................... 3 1.3 Off-the-shelf (OTS) Software Development -
Dtwiki: a Disconnection and Intermittency Tolerant Wiki
DTWiki: A Disconnection and Intermittency Tolerant Wiki Bowei Du Eric A. Brewer Computer Science Division Computer Science Division 445 Soda Hall 623 Soda Hall University of California, Berkeley University of California, Berkeley Berkeley, CA 94720-1776 Berkeley, CA 94720-1776 [email protected] [email protected] ABSTRACT which the users can participate in writing Wikipedia articles. The Wikis have proven to be a valuable tool for collaboration and con- popularity of “wikis” [4] as website content management software tent generation on the web. Simple semantics and ease-of-use make also speaks to the usefulness of the medium. Generally speaking, wiki systems well suited for meeting many emerging region needs wikis have proven to be an excellent tool for collaboration and con- in the areas of education, collaboration and local content genera- tent generation. tion. Despite their usefulness, current wiki software does not work Several aspects of wikis are interesting for the emerging regions well in the network environments found in emerging regions. For context. First, there is a great need in emerging regions for content example, it is common to have long-lasting network partitions due that is locally relevant. Local content can take a variety of forms, to cost, power and poor connectivity. Network partitions make a from a local translation of existing online material to the commu- traditional centralized wiki architecture unusable due to the un- nity knowledge bases. Most of the content on the web today is availability of the central server. Existing solutions towards ad- written in English and targeted towards in the industrialized world.