Replication, History, and Grafting in the Ori File System
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Online Layered File System (OLFS): a Layered and Versioned Filesystem and Performance Analysis
Loyola University Chicago Loyola eCommons Computer Science: Faculty Publications and Other Works Faculty Publications 5-2010 Online Layered File System (OLFS): A Layered and Versioned Filesystem and Performance Analysis Joseph P. Kaylor Konstantin Läufer Loyola University Chicago, [email protected] George K. Thiruvathukal Loyola University Chicago, [email protected] Follow this and additional works at: https://ecommons.luc.edu/cs_facpubs Part of the Computer Sciences Commons Recommended Citation Joe Kaylor, Konstantin Läufer, and George K. Thiruvathukal, Online Layered File System (OLFS): A layered and versioned filesystem and performance analysi, In Proceedings of Electro/Information Technology 2010 (EIT 2010). This Conference Proceeding is brought to you for free and open access by the Faculty Publications at Loyola eCommons. It has been accepted for inclusion in Computer Science: Faculty Publications and Other Works by an authorized administrator of Loyola eCommons. For more information, please contact [email protected]. This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. Copyright © 2010 Joseph P. Kaylor, Konstantin Läufer, and George K. Thiruvathukal 1 Online Layered File System (OLFS): A Layered and Versioned Filesystem and Performance Analysis Joe Kaylor, Konstantin Läufer, and George K. Thiruvathukal Loyola University Chicago Department of Computer Science Chicago, IL 60640 USA Abstract—We present a novel form of intra-volume directory implement user mode file system frameworks such as FUSE layering with hierarchical, inheritance-like namespace unifica- [16]. tion. While each layer of an OLFS volume constitutes a subvol- Namespace Unification: Unix supports the ability to ume that can be mounted separately in a fan-in configuration, the entire hierarchy is always accessible (online) and fully navigable mount external file systems from external resources or local through any mounted layer. -
LLNL Computation Directorate Annual Report (2014)
PRODUCTION TEAM LLNL Associate Director for Computation Dona L. Crawford Deputy Associate Directors James Brase, Trish Damkroger, John Grosh, and Michel McCoy Scientific Editors John Westlund and Ming Jiang Art Director Amy Henke Production Editor Deanna Willis Writers Andrea Baron, Rose Hansen, Caryn Meissner, Linda Null, Michelle Rubin, and Deanna Willis Proofreader Rose Hansen Photographer Lee Baker LLNL-TR-668095 3D Designer Prepared by LLNL under Contract DE-AC52-07NA27344. Ryan Chen This document was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor Lawrence Livermore National Security, LLC, nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, Print Production manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or Lawrence Livermore National Security, LLC. The views and opinions of authors expressed herein do not necessarily state or reflect those of the Charlie Arteago, Jr., and Monarch Print Copy and Design Solutions United States government or Lawrence Livermore National Security, LLC, and shall not be used for advertising or product endorsement purposes. CONTENTS Message from the Associate Director . 2 An Award-Winning Organization . 4 CORAL Contract Awarded and Nonrecurring Engineering Begins . 6 Preparing Codes for a Technology Transition . 8 Flux: A Framework for Resource Management . -
Enabling Security in Cloud Storage Slas with Cloudproof
Enabling Security in Cloud Storage SLAs with CloudProof Raluca Ada Popa Jacob R. Lorch David Molnar Helen J. Wang Li Zhuang MIT Microsoft Research [email protected] {lorch,dmolnar,helenw,lizhuang}@microsoft.com ABSTRACT ers [30]. Even worse, LinkUp (MediaMax), a cloud storage Several cloud storage systems exist today, but none of provider, went out of business after losing 45% of client data them provide security guarantees in their Service Level because of administrator error. Agreements (SLAs). This lack of security support has been Despite the promising experiences of early adopters and a major hurdle for the adoption of cloud services, especially benefits of cloud storage, issues of trust pose a significant for enterprises and cautious consumers. To fix this issue, we barrier to wider adoption. None of today's cloud stor- present CloudProof, a secure storage system specifically de- age services|Amazon's S3, Google's BigTable, HP, Mi- signed for the cloud. In CloudProof, customers can not only crosoft's Azure, Nirvanix CloudNAS, or others|provide se- detect violations of integrity, write-serializability, and fresh- curity guarantees in their Service Level Agreements (SLAs). ness, they can also prove the occurrence of these violations For example, S3's SLA [1] and Azure's SLA [10] only guar- to a third party. This proof-based system is critical to en- antee availability: if availability falls below 99:9%, clients abling security guarantees in SLAs, wherein clients pay for are reimbursed a contractual sum of money. As cloud stor- a desired level of security and are assured they will receive age moves towards a commodity business, security will be a certain compensation in the event of cloud misbehavior. -
VERSIONFS a Versatile and User-Oriented Versioning File System
VERSIONFS A Versatile and User-Oriented Versioning File System A THESIS PRESENTED BY KIRAN-KUMAR MUNISWAMY-REDDY TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN COMPUTER SCIENCE STONY BROOK UNIVERSITY Technical Report FSL-03-03 December 2003 Abstract of the Thesis Versionfs A Versatile and User-Oriented Versioning File System by Kiran-Kumar Muniswamy-Reddy Master of Science in Computer Science Stony Brook University 2003 File versioning is a useful technique for recording a history of changes. Applications of ver- sioning include backups and disaster recovery, as well as monitoring intruders’ activities. Alas, modern systems do not include an automatic and easy-to-use file versioning system. Existing backup systems are slow and inflexible for users. Even worse, they often lack backups for the most recent day’s activities. Online disk snapshotting systems offer more fine-grained versioning, but still do not record the most recent changes to files. Moreover, existing systems also do not give individual users the flexibility to control versioning policies. We designed a lightweight user-oriented versioning file system called Versionfs. Versionfs works with any file system, whether local or remote, and provides a host of user-configurable policies: versioning by users, groups, processes, or file names and extensions; version retention policies by maximum number of versions kept, age, or total space consumed by versions of a file; version storage policies using full copies, compressed copies, or deltas. Versionfs creates file versions automatically, transparently, and in a file-system portable manner—while maintaining Unix semantics. A set of user-level utilities allow administrators to configure and enforce default policies; users are able to set policies within configured boundaries, as well as view, control, and recover files and their versions. -
Metadata Efficiency in Versioning File Systems
2nd USENIX Conference on File and Storage Technologies, San Francisco, CA, Mar 31 - Apr 2, 2003. Metadata Efficiency in Versioning File Systems Craig A.N. Soules, Garth R. Goodson, John D. Strunk, Gregory R. Ganger Carnegie Mellon University Abstract of time over which comprehensive versioning is possi- ble. To be effective for intrusion diagnosis and recovery, Versioning file systems retain earlier versions of modi- this duration must be greater than the intrusion detection fied files, allowing recovery from user mistakes or sys- latency (i.e., the time from an intrusion to when it is de- tem corruption. Unfortunately, conventional versioning tected). We refer to the desired duration as the detection systems do not efficiently record large numbers of ver- window. In practice, the duration is limited by the rate sions. In particular, versioned metadata can consume of data change and the space efficiency of the version- as much space as versioned data. This paper examines ing system. The rate of data change is an inherent aspect two space-efficient metadata structures for versioning of a given environment, and an analysis of several real file systems and describes their integration into the Com- environments suggests that detection windows of several prehensive Versioning File System (CVFS), which keeps weeks or more can be achieved with only a 20% cost in all versions of all files. Journal-based metadata encodes storage capacity [41]. each metadata version into a single journal entry; CVFS uses this structure for inodes and indirect blocks, reduc- In a previous paper [41], we described a prototype self- ing the associated space requirements by 80%. -
Replication, History, and Grafting in the Ori File System
Replication, History, and Grafting in the Ori File System Ali Jose´ Mashtizadeh, Andrea Bittau, Yifeng Frank Huang, David Mazieres` Stanford University Abstract backup, versioning, access from any device, and multi- user sharing—over storage capacity. But is the cloud re- Ori is a file system that manages user data in a modern ally the best place to implement data management fea- setting where users have multiple devices and wish to tures, or could the file system itself directly implement access files everywhere, synchronize data, recover from them better? disk failure, access old versions, and share data. The In terms of technological changes, disk space has in- key to satisfying these needs is keeping and replicating creased dramatically and has outgrown the increase in file system history across devices, which is now prac- wide-area bandwidth. In 1990, a typical desktop machine tical as storage space has outpaced both wide-area net- had a 60 MB hard disk, whose entire contents could tran- work (WAN) bandwidth and the size of managed data. sit a 9,600 baud modem in under 14 hours [2]. Today, Replication provides access to files from multiple de- $120 can buy a 3 TB disk, which requires 278 days to vices. History provides synchronization and offline ac- transfer over a 1 Mbps broadband connection! Clearly, cess. Replication and history together subsume backup cloud-based storage solutions have a tough time keep- by providing snapshots and avoiding any single point of ing up with disk capacity. But capacity is also outpac- failure. In fact, Ori is fully peer-to-peer, offering oppor- ing the size of managed data—i.e., the documents on tunistic synchronization between user devices in close which users actually work (as opposed to large media proximity and ensuring that the file system is usable so files or virtual machine images that would not be stored long as a single replica remains. -
Sistemas De Archivos Distribuido Para Clúster HPC Utilizando Ceph
Departamento de Telecomunicaciones y Electrónica Título: Sistemas de archivos distribuido para Clúster HPC utilizando Ceph Autor: Daniel Placencia Alvarez Tutor: Ing. Javier Antonio Ruiz Bosch , Junio, 2019 Este documento es Propiedad Patrimonial de la Universidad Central “Marta Abreu” de Las Villas, y se encuentra depositado en los fondos de la Biblioteca Universitaria “Chiqui Gómez Lubian” subordinada a la Dirección de Información Científico Técnica de la mencionada casa de altos estudios. Se autoriza su utilización bajo la licencia siguiente: Atribución- No Comercial- Compartir Igual Para cualquier información contacte con: Dirección de Información Científico Técnica. Universidad Central “Marta Abreu” de Las Villas. Carretera a Camajuaní. Km 5½. Santa Clara. Villa Clara. Cuba. CP. 54 830 Teléfonos.: +53 01 42281503-1419 Hago constar que el presente trabajo de diploma fue realizado en la Universidad Central “Marta Abreu” de Las Villas como parte de la culminación de estudios de la especialidad de Ingeniería en Telecomunicaciones y Electrónica, autorizando a que el mismo sea utilizado por la Institución, para los fines que estime conveniente, tanto de forma parcial como total y que además no podrá ser presentado en eventos, ni publicados sin autorización de la Universidad. Firma del Autor Los abajo firmantes certificamos que el presente trabajo ha sido realizado según acuerdo de la dirección de nuestro centro y el mismo cumple con los requisitos que debe tener un trabajo de esta envergadura referido a la temática señalada. Firma del Tutor Firma del Jefe de Departamento donde se defiende el trabajo Firma del Responsable de Información Científico-Técnica i PENSAMIENTO Muchos de los fracasos en la vida lo experimentan personas que no se dan cuenta de cuan cerca estuvieron del éxito cuando decidieron darse por vencidos. -
A Distributed File System for Distributed Conferencing System
A DISTRIBUTED FILE SYSTEM FOR DISTRIBUTED CONFERENCING SYSTEM By PHILIP S. YEAGER A THESIS PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE UNIVERSITY OF FLORIDA 2003 Copyright 2003 by Philip S. Yeager ACKNOWLEDGMENTS I would like to thank Dr. Richard Newman for his help and guidance with this project. I would like to express my gratitude to Dr. Jonathan C.L. Liu and Dr. Beverly Sanders for serving on my committee. I would like to thank Dr. Joseph Wilson for serving as a substitute at my defense. I would also like to thank Vijay Manian and the other DCS group members for their advice and contributions. I thank my parents and friends for their encouragement and support. Finally, I would like to thank Candice Williams for everything she has done. Without these people this work would not have been possible. iii TABLE OF CONTENTS Page ACKNOWLEDGMENTS ................................................................................................. iii LIST OF FIGURES ......................................................................................................... viii ABSTRACT....................................................................................................................... ix CHAPTER 1 INTRODUCTION ........................................................................................................1 1.1 Introduction........................................................................................................1 -
How to Copy Files
How to Copy Files Yang Zhan, The University of North Carolina at Chapel Hill and Huawei; Alexander Conway, Rutgers University; Yizheng Jiao and Nirjhar Mukherjee, The University of North Carolina at Chapel Hill; Ian Groombridge, Pace University; Michael A. Bender, Stony Brook University; Martin Farach-Colton, Rutgers University; William Jannen, Williams College; Rob Johnson, VMWare Research; Donald E. Porter, The University of North Carolina at Chapel Hill; Jun Yuan, Pace University https://www.usenix.org/conference/fast20/presentation/zhan This paper is included in the Proceedings of the 18th USENIX Conference on File and Storage Technologies (FAST ’20) February 25–27, 2020 • Santa Clara, CA, USA 978-1-939133-12-0 Open access to the Proceedings of the 18th USENIX Conference on File and Storage Technologies (FAST ’20) is sponsored by How to Copy Files Yang Zhan Alex Conway Yizheng Jiao Nirjhar Mukherjee UNC Chapel Hill and Huawei Rutgers Univ. UNC Chapel Hill UNC Chapel Hill Ian Groombridge Michael A. Bender Martín Farach-Colton William Jannen Pace Univ. Stony Brook Univ. Rutgers Univ. Williams College Rob Johnson Donald E. Porter Jun Yuan VMware Research UNC Chapel Hill Pace Univ. Abstract Docker make heavy use of logical copies to package and deploy applications [34, 35, 37, 44], and new container cre- Making logical copies, or clones, of files and directories ation typically begins by making a logical copy of a reference is critical to many real-world applications and workflows, directory tree. including backups, virtual machines, and containers. An ideal Duplicating large objects is so prevalent that many file sys- clone implementation meets the following performance goals: tems support logical copies of directory trees without making (1) creating the clone has low latency; (2) reads are fast in full physical copies. -
The Evolution of File Systems
The Evolution of File Systems Thomas Rivera, Hitachi Data Systems Craig Harmer, April 2011 SNIA Legal Notice The material contained in this tutorial is copyrighted by the SNIA. Member companies and individuals may use this material in presentations and literature under the following conditions: Any slide or slides used must be reproduced without modification The SNIA must be acknowledged as source of any material used in the body of any document containing material from these presentations. This presentation is a project of the SNIA Education Committee. Neither the Author nor the Presenter is an attorney and nothing in this presentation is intended to be nor should be construed as legal advice or opinion. If you need legal advice or legal opinion please contact an attorney. The information presented herein represents the Author's personal opinion and current understanding of the issues involved. The Author, the Presenter, and the SNIA do not assume any responsibility or liability for damages arising out of any reliance on or use of this information. NO WARRANTIES, EXPRESS OR IMPLIED. USE AT YOUR OWN RISK. The Evolution of File Systems 2 © 2012 Storage Networking Industry Association. All Rights Reserved. 2 Abstract The File Systems Evolution Over time additional file systems appeared focusing on specialized requirements such as: data sharing, remote file access, distributed file access, parallel files access, HPC, archiving, security, etc. Due to the dramatic growth of unstructured data, files as the basic units for data containers are morphing into file objects, providing more semantics and feature- rich capabilities for content processing This presentation will: Categorize and explain the basic principles of currently available file system architectures (e.g. -
Abréviations De L'informatique Et De L'électronique/Version Imprimable
Abréviations de l'informatique et de l'électronique/Version imprimable... https://fr.wikibooks.org/w/index.php?title=Abréviations_de_l'informat... Un livre de Wikilivres. Une version à jour et éditable de ce livre est disponible sur Wikilivres, une bibliothèque de livres pédagogiques, à l'URL : http://fr.wikibooks.org/wiki/Abr%C3%A9viations_de_l%27informatique_et_de_l %27%C3%A9lectronique Vous avez la permission de copier, distribuer et/ou modifier ce document selon les termes de la Licence de documentation libre GNU, version 1.2 ou plus récente publiée par la Free Software Foundation ; sans sections inaltérables, sans texte de première page de couverture et sans Texte de dernière page de couverture. Une copie de cette licence est inclue dans l'annexe nommée « Licence de documentation libre GNU ». A AA : Anti-Aliasing (Anticrènelage) AAA : Authentication Authorization Accounting AAC : Advanced Audio Coding AAD : Analogique-Analogique-Digital ABAP : Allgemeiner Berichtsaufbereitungsprozessor, (en anglais : Advanced Business Application Programming) Langage dans SAP Ack : Acknowledge character (Acquittement) AC97 : Audio Codec '97 (Audio Codec 1997) ACE Access Control Entry, voir Access Control List Adaptive Communication Environment, voir anglais Adaptive Communication Environment ACE ACL : Access Control List 1 sur 36 14/07/2015 00:18 Abréviations de l'informatique et de l'électronique/Version imprimable... https://fr.wikibooks.org/w/index.php?title=Abréviations_de_l'informat... ACPI : advanced configuration and power interface ACRONYM -
Content Addressed, Versioned, P2P File System (DRAFT 3)
IPFS - Content Addressed, Versioned, P2P File System (DRAFT 3) Juan Benet [email protected] ABSTRACT parties invested in the current model. But from another per- The InterPlanetary File System (IPFS) is a peer-to-peer dis- spective, new protocols have emerged and gained wide use tributed file system that seeks to connect all computing de- since the emergence of HTTP. What is lacking is upgrading vices with the same system of files. In some ways, IPFS design: enhancing the current HTTP web, and introducing is similar to the Web, but IPFS could be seen as a sin- new functionality without degrading user experience. gle BitTorrent swarm, exchanging objects within one Git Industry has gotten away with using HTTP this long be- repository. In other words, IPFS provides a high through- cause moving small files around is relatively cheap, even for put content-addressed block storage model, with content- small organizations with lots of traffic. But we are enter- addressed hyper links. This forms a generalized Merkle ing a new era of data distribution with new challenges: (a) DAG, a data structure upon which one can build versioned hosting and distributing petabyte datasets, (b) computing file systems, blockchains, and even a Permanent Web. IPFS on large data across organizations, (c) high-volume high- combines a distributed hashtable, an incentivized block ex- definition on-demand or real-time media streams, (d) ver- change, and a self-certifying namespace. IPFS has no single sioning and linking of massive datasets, (e) preventing ac- point of failure, and nodes do not need to trust each other.