Distinguish DistributedFileSystem Microsoft The DCEDistributedFileSystemDCE DFS ref name DCEDFS http www.opengroup.org dce info papers osf o wp8 0990 2.ps File Systems in a Distributed Computing Environment , Open Software Foundation, July 1991 ref is the remote file access protocol used with the Distributed ... Category Distributedfile systems Category Internet protocols Category Network file systems Category Internet Protocol based network software Compu storage stub es DCEDistributedFileSystem it DCEDistributedFileSystem ja DCEDistributedFileSystem ... journaling filesystemDCE LFS also known as Episode filesystem Episode was developed to provide the full ... library l plam ?S TACT 105AGX52&S CMP cn a l ADFS Advanced DistributedFileSystem . One major goal ... commercially by Transarc Corporation. AFS Version 3.0 was in turn based on the Andrew FileSystem Version 2.0 protocol also used by the Coda disconnected filesystem originally developed at Carnegie Mellon University . DCE DFS consisted of multiple cooperative components that provided a network filesystem with strong filesystem semantics, attempting to mimic the behavior of POSIX local file systems while taking advantage of performance optimizations when possible. A DCE DFS client system utilized a locally managed cache that would contain copies or regions of the original file. The client system would coordinate with a server system where the original copy of the file was stored to ensure that multiple clients accessing the same file would re fetch a cached copy of the file data when the original file had changed. The advantage of this approach is that it provided very good performance even over slow network connections because most of the file access was actually done to the local cached regions of the file. If the server failed, the client could continue making changes to the file locally, storing it back to the server when it became available again. DCE DFS also divorced the concept ... more details
A distributedfilesystem is a filesystem where data is distributed across multiple nodes. Distributedfilesystem can also refer to Shared disk filesystem , a different approach, also known as cluster filesystem. DistributedFileSystem Microsoft , the Microsoft distributedfilesystem DFS DCEDistributedFileSystem , the distributedfilesystem from The Open Group and earlier from IBM Distributed data store disambig ... more details
as DFS and Dfs by Microsoft and is unrelated to the DCEDistributedFileSystem , which ...About Microsoft s implementation of DFS general discussion of the concept and other implementations DistributedfilesystemDistributedFileSystem DFS is a set of client and server services that allow an organization using Microsoft Windows servers to organize many distributed Server Message Block SMB file shares into a distributedfilesystem . DFS provides location transparency and redundancy to improve data availability in the face of failure or heavy load by allowing shares in multiple different ... of DistributedFileSystem was first introduced as an add on to Windows NT 4.0 Server, called DFS ... dfs default.mspx Microsoft Windows Server 2003 DistributedFileSystem Technology Center http technet.microsoft.com en us library cc782417.aspx How DFS Works Remote File Systems http download.microsoft.com ... nowiki DistributedFileSystem DFS Referral Protocol Specification See also List of Microsoft Windows components Microsoft Windows components Category Distributedfile systems Category Network file systems ... Windows 2000 cs DistributedFileSystem Microsoft de DistributedFileSystem Microsoft it DistributedFileSystem Microsoft nl DistributedFileSystem pl DFS Microsoft ru DistributedFileSystem ... come with an SMB client Virtual filesystem VFS called cifs that supports DFS. Thursby Software s DAVE ... together it is perfectly possible to use the logical namespace component without using DFS file replication, and it is perfectly possible to use file replication between servers without combining them ... fault tolerance. DFS namespaces Traditional file shares, associated with a single server, have SMB paths of the form SERVER path subpath . Domain based DFS file share paths are distinguished by using ... failed over . DFS replication Early versions of DFS used FRS which provides basic file replication ... file to all servers. Windows Server 2003 R2 introduced DFS Replication DFSR which improves ... more details
hatnote Network filesystem and Parallel filesystem redirect here. For the specific protocols, see Network FileSystem and IBM General Parallel FileSystem . ref improve date December 2011 In computing, a distributedfilesystem or network filesystem is any filesystem that allows access to computer ..., Galvin 1994 . Operating System concepts , chapter 17 Distributedfile systems . Addison Wesley Publishing ... is designed. In contrast, in a shared disk filesystem all nodes have equal access to the block storage where the filesystem is located. On these systems the access control must reside on the client. Distributedfile systems may include facilities for transparent replication computer science replication and fault tolerance . That is, when a limited number of nodes in a filesystem go offline, the system continues to work without any data loss . The difference between a distributedfilesystem and a distributed ... CPU processing time. But in a network filesystem, a remote access has additional overhead due to the distributed ... HDFS Hadoop DistributedFileSystem HDFS Lustre filesystem Lustre Moose FileSystem MooseFS OneFS ... fcla etd UFE0001123 A distributedfilesystem for distributed conferencing system A DFS for the DCS ... to restrict access to the filesystem depending on access list s or Capability based security ... as part of DECnet Phase II which became the first widely used network filesystem. In 1985 Sun Microsystems created the filesystem called Network FileSystem protocol Network FileSystem NFS which became the first widely used Internet Protocol based network filesystem. Other notable network file systems are Andrew FileSystem AFS , Apple Filing Protocol AFP , NetWare Core Protocol NCP , and Server Message Block SMB which is also known as Common Internet FileSystem CIFS . Transparency Transparency is usually built into distributedfile systems, so that files accessed over the network can ... of servers and storage devices are thus made invisible . It is up to the network filesystem to locate ... more details
filesystem is a distributedfilesystemdistributed networked filesystem designed by Isilon ... links http www.isilon.com onefs operating system OneFS OS Web page http www.isilon.com Isilon Web page See also List of file systems Distributedfilesystem Notes reflist Category Distributedfile ... to administer the system. On disk Structure All data structures in the OneFS filesystem maintain their own protection information. This means in the same filesystem, one file may be protected at 1 ... filesystem journaled . Protocols OneFS is equipped with options for accessing storage via Network FileSystem NFS , CIFS Server Message Block SMB , FTP, HTTP and Iscsi iSCSI . It can utilize non local ... 2011 12 01 ref Multicol break 6.0 Can scale to 10.4 PB of storage in a single filesystem 6.0.1 6.0.2 ... file may be protected at 2x Disk mirroring mirror ing this feature is referred to as FlexProtect ... Solomon error correction Reed Solomon Algorithm . Blocks for an individual file are spread across ... block on Node 5. This allows entire nodes to fail without losing access to any data. File metadata ..., allocation, and event traffic go over the back end RPC system. All data and metadata transfers ... more details
DCE may refer to Delhi College of Engineering , University of Delhi, India Dalian Commodity Exchange Data circuit terminating equipment , also called Data Communications Equipment or Data Carrier Equipment Cisco s DCE product portfolio Data Center Ethernet Dead code elimination , a kind of compiler optimization Deus Caritas Est , Latin for God is love Distributed Computing Environment , a specification from The Open Group Drum Corps Europe Digital currency exchanger Digital Consumer Enablement , a misnomer for Digital Rights Management Dichloroethene disambiguation , also called dichloroethylene, an organic solvent disambig cs DCE de DCE fr DCE ko DCE it DCE ja DCE pl DCE ... more details
file systems Main Distributedfilesystem A network filesystem is a filesystem that acts as a client ... process to have a different view of the many file systems that provide resources in a distributedsystem ... Refimprove date August 2011 A filesystem or filesystem is a means to organize data expected to be retained ... as manage the available space on the device s which contain it. A filesystem organizes data in an efficient ... exists between the operating system and the filesystem. Some file systems provide mechanisms to control ... system. Some file systems allow multiple programs to update the same file at nearly the same time. File ... FileSystem protocol NFS , Server Message Block SMB , or 9P clients , or they may be virtual and exist ... allocate space in a granular manner, usually multiple physical units on the device. The filesystem ... when the filesystem is created. Choosing the allocation size based on the average size of the files expected to be in the filesystem can minimize the amount of unusable space. Frequently the default ... in excessive overhead if the filesystem will contain mostly very large files. Filesystem fragmentation occurs when unused space or single files are not contiguous. As a filesystem is used, files are created, modified and deleted. When a file is created the filesystem allocates space for the data ... allocation must be assigned elsewhere and the file becomes fragmented. A filesystem may not make ... to reference the storage location in the filesystem. Most file systems have restrictions on the length ... sensitive. Most filesystem interface utilities have special characters that you cannot normally use in a filename the filesystem may use these special characters to indicate a device, device type ... file names with special characters. Some filesystem utilities, editors and compilers treat prefixes ... system. Directories Main Directory file systems File systems typically have directories sometimes ... name to an index in a table of contents or an inode in a Unix like filesystem. Directory structures ... more details
A systemfile is a computer file important to the operating system . More specifically, it may refer to code .sys code a Microsoft Windows file extension for system related files The System suitcase on Mac OS Any file marked with a system attribute computing attribute sys is the root directory of the Linux filesystem sysfs disambig Category Files el ko ru ... more details
infobox filesystem name BFS full name Be FileSystem developer Be Inc. introduction os BeOS Advanced ... ZETA ZETA , Haiku operating system Haiku , SkyOS , Syllable operating system Syllable The Be File ... any confusion with Boot FileSystem is the native filesystem for the BeOS . BFS was developed by Dominic ... filesystem design.pdf title Practical FileSystem Design with the Be FileSystem publisher Morgan ... filesystem . ref cite web url http www.theregister.co.uk 2002 03 29 windows on a database sliced ..., as the filesystem headers consume from 600 KB to 2 MB, rendering floppy disks virtually useless. Like its predecessor, OFS Old Be FileSystem, written by Benoit Schillings , was also called ... database . Whilst intended as a 64 bit capable filesystem, the size of some on disk structures ... as a few blocks in a pathological worst case, depending on the degree of filesystem fragmentation ... part, documented in the book Practical FileSystem Design with the Be FileSystem . ref ... implementations for Linux . In early 1999, Makoto Kato developed a Be FileSystem driver ... had developed a fork of this OpenBFS filesystem for use in his SkyOS operating system. ref cite web ... system Syllable and has been included since version 0.6.5. See also Comparison of file systems AtheOS FileSystem References Reflist External links http arstechnica.com open source news 2010 06 the beos filesystem.ars The BeOS filesystem an OS geek retrospective br Filesystem Category Disk file systems Category BeOS Category Haiku operating system de Be FileSystem fr BeOS filesystem gl BFS it Be FileSystem pl Be FileSystem pt Be FileSystem ru BeFS uk BeFS ... Map br 0xEB Master Boot Record MBR directory struct B tree file struct inode s bad blocks struct inodes max filename size 255 characters max files no Unlimited max volume size 2 Exabyte EB max file size ... range Unknown date resolution 1s forks streams Yes attributes POSIX ACLs Read, Write, Execute file ... more details
as the Episode filesystem Local FileSystem , a lower layer of the Distributed Computing Environment DCEDCEDistributedFileSystemDistributedFileSystem . It was available on MVS ESA V5R2.2 and all OS 390 releases. DFS LFS was provided as a part of the DCE feature, not of the base operating system as in z OS. zFS was also an IBM research project to develop a distributed, decentralized filesystem. It was a follow on to the IBM DSF Data Sharing Facility project to build a serverless filesystem. Citation needed date September 2010 Neither filesystem has any relation to Oracle Sun s ZFS . External links http www.redbooks.ibm.com abstracts sg246580.html z OS DistributedFile Service zSeries FileSystem Implementation http www.haifa.il.ibm.com projects storage zFS zFS serverless project Web site DEFAULTSORT Zfs Ibm FileSystem Category Disk file systems Category IBM mainframe operating ... more details
oneref date August 2010 A distributed database management system DDBMS is a software system that permits the management of a distributed database and makes the distribution transparent to the users. A distributed database is a collection of multiple, logically interrelated databases distributed over a computer network. Sometimes distributed database system is used to refer jointly to the distributed database and the distributed DBMS. Overview Distributed database management systems is a software for managing databases stored on multiple computers in a network. A distributed database is a set of databases stored on multiple computers that typically appears to applications on a single database. Consequently, an application can simultaneously access and modify the data in several databases in a network. DDBMS is specially developed for heterogeneous database platforms, focusing mainly on heterogeneous database management systems HDBMS . See also Heterogeneous Database System References M. T. zsu and P. Valduriez, Principles of Distributed Database Systems 2nd edition , Prentice Hall , 1999. ISBN 0 13 659707 6. Databases DEFAULTSORT Distributed Database Management System Category Database management systems Category Applications of distributed computing eu Datu base banatuak kudeatzeko sistema tr Da t k veritaban y netim sistemi ... more details
10px File Writing bullet.svg top A major portion of a system s Boolean logic logic is distributed ... , 21 65. ref FileSystem abstraction pad 2em Measurements of a distributedfilesystem ref Baker ...A distributed operating system is the logical aggregation of operating system software over a collection ... system OS is an operating system is a generalization of a traditional operating system. A distributed ..., the communications sub system is of foremost importance for a distributed OS. ref name TLD In a distributed ... system kernel Pecheur, C. 1992. Using LOTOS for specifying the CHORUS distributed operating ... match the functions of a single entity system, adding the transparency required in a distributed .... ref name DSA Working together as an operating system The architecture and design of a distributed ... operating system attempts to provide an efficient and reliable distributed computing framework ... between the distinct nodes in a distributed operating system is the functional challenge of the distributed operating system. This is the point in the system that must maintain a perfect harmony ... is the distributed operating system s opportunity to produce the foundation and framework ... to any user. As such, the logical price of realizing a distributed operation system must be calculated .... For instance, a deep understanding of a distributed operating system s overall architectural and design ... considerations are inherent in the development of a distributed operating system. Each of these design ... of a system exhibiting distributed control, its central unit not having dedicated control. seems ... of a distributed logic system with... the macroscopic concept of logical design, away from scanning ... filesystem. In Proceedings of the Thirteenth ACM Symposium on Operating Systems Principles ..., examine three system Software architecture architectures centralized, decentralized, and distributed ... at a central master element. A distributedsystem is a collection of autonomous elements with no concept ... more details
Infobox software name Distributed Concurrent Versions System logo screenshot caption developer elego Software Solutions GmbH discontinued released Start date and age 2002 08 latest release version 1.0.3 latest release date Start date and age 2006 09 25 latest preview version latest preview date operating system Unix like , Microsoft Windows Windows platform programming language C programming language C status Unmaintained genre Revision control license GNU General Public License website URL http dcvs.elegosoft.com The Distributed Concurrent Versions System DCVS is a distributed revision control system that enables software developers working on locally distributed sites to efficiently collaborate on a software project. DCVS is based on the well known version control system Concurrent Versions System . The code is freely distributable under the GNU and BSD style licenses. Motivation CVS is based on a pure centralistic organizational model and offers very little offline support. Almost all ... http www.cvsup.org The CVS Optimized General Purpose Network File Distribution System CVSup http www.wandisco.com WANdisco for CVS Transactional Multisite System Revision control software Category Concurrent Versions System Category Free revision control software ... distributed software development efforts face heavy performance problems when using CVS. DCVS ... all CVS functionality. But unlike CVS a DCVS system may comprise an arbitrary number of geographically distributed repositories whose contents are kept equal in the background by an extended version ... faster in a distributed scenario. In order to avoid collisions and data loss every DCVS server ... for servers, collections, and ranges are read from a single configuration file. By consulting the contents of this file, every DCVS server can decide if it is responsible for a certain branch or delta of a given file. If so, all modifying operations are allowed if not, modifying operations ... more details
The Distributed Common Ground System , officially known as the AN GSQ 272 Sentinel is a weapons system which produces intelligence for both the United States Army and United States Air Force . While in U.S. Air Force use, the system produces intelligence collected by the U 2 Dragonlady , RQ 4 Global Hawk , MQ 9 Reaper and MQ 1 Predator . Operators 9th Intelligence Squadron 48th Intelligence Squadron 101st Intelligence Squadron 113th Air Support Operations Squadron 127th Command and Control Squadron 161st Intelligence Squadron External links http www.af.mil information factsheets factsheet.asp?id 15433 Air Force information page http www.gdc4s.com content detail.cfm?item 004279f8 a9a9 4c18 8051 f9e1acb643ee Army information page Category United States Army equipment Category Equipment of the United States Air Force ... more details
into the human body. Use in Wifi Networks Using a distributed antenna system to create an area ... uses. It is estimated that only about 5 of commercial WiFi use a distributed antenna system. ref ... is present more frequently, leading to reduced fading fade depths and reduced delay spread. A distributed antenna system can be implemented using passive DSL filter splitter s and feeders, or active .... If a given area is covered by many distributed antenna elements rather than a single antenna ... levels. Recent academic works address this. ref Establishing a Regulatory Framework for Distributed .... ref http TheDASForum.org ref DAS Installers Being that Distributed Antenna Systems are still ... more details
Manufacturing A distributed control system DCS refers to a control system usually of a manufacturing system what? date April 2012 , industrial process process or any kind of dynamic system , in which the controller control theory controller elements are not central in location like the brain but are distributed throughout the system with each component sub system controlled by one or more controllers. The entire system of controllers is connected by networks for communication and monitoring. DCS is a very broad term used in a variety of industries, to monitor and control distributed equipment. Electrical .... See Process automation system . The elements of a DCS may connect directly to physical equipment such as switches, pumps and valves or they may work through an intermediate system such as a SCADA system. Applications Distributed control systems DCSs are dedicated systems used to control manufacturing ... to a serial communication network of distributed controllers each running two Z80s. The system ... UK Pages Foxboro DCSIASeries.aspx Foxboro I A Series Distributed Control System ref system in 1987 ... System Expand section date June 2008 DEFAULTSORT Distributed Control System Category Automation ... de contr le commande it Sistema di controllo distribuito nl Distributed control system ja ... sv Distributed control system ta uk ... and modules through multiplexer or demultiplexers. Buses also connect the distributed controllers ... quality controls see Quality Control System QCS for paper, board and tissue machines quality control system QCS , variable speed drives and motor control centers, cement kilns, mining ... distributed digital controllers capable of executing from 1 to 256 or more regulatory ... logic and sequential control. Modern DCSs also support neural networks and fuzzy application. DCS system are usually designed with redundant processors to enhance the reliability of the control system ... more details
Orphan date February 2009 DistributedSystem Security Architecture or DSSA is a computer security architecture that provides a suite of subroutine function s including login, authentication, and access control in a distributedsystem . To differ from other similar architectures, the DSSA architecture offers the ability to access all these functions without the trusted Server computing server known as a certificate authority being active. In DSSA, security objects are handled by owners and access is controlled by the central, universally trusted, certificate authority. DSSA SPX DSSA SPX is the authentication protocol of DSSA. The CDC is a Public key certificate certificate granting server while the certificate is a ticket signed by CA which contains the public key of the party being certified. Since the CDC is merely distributing previously signed certificates, it is not necessary for it to be trusted. math A rightarrow CDC B math math CDC rightarrow A certificate B, CA math math A rightarrow B A, T A, A K AB , L, A, P A S A, K AB P B S A math math B rightarrow CDC A math math CDC rightarrow B certificate A, CA math math B rightarrow A T A 1 K AB math External links http www.pasta.cs.uit.no thesis html ronnya node43.html Tromsoe University http citeseer.ist.psu.edu gasser89digital.html Gasser 1989 Category Cryptographic protocols ... more details
The Distributed Annotation System DAS is an open source project that is used in bioinformatics to share and collate genomic annotation information. ref name pmid11667947 cite journal doi 10.1186 1471 2105 2 7 author Dowell RD, Jokerst RM, Day A, Eddy SR, Stein L title The distributed annotation system. journal BMC Bioinformatics volume 2 pages 7 year 2001 pmid 11667947 pmc 58584 ref ref name pmid17237073 cite journal author Finn RD, Stalker JW, Jackson DK, Kulesha E, Clements J, Pettett R title ProServer a simple, extensible Perl DAS server. journal Bioinformatics volume 23 issue 12 pages 1568 70 year 2007 pmid 17237073 pmc 2989875 doi 10.1093 bioinformatics btl650 ref ref name pmid18673527 cite journal author Jenkinson AM, Albrecht M, Birney E, Blankenburg H, Down T, Finn RD, Hermjakob H, Hubbard TJ, Jimenez RC, Jones P, K h ri A, Kulesha E, Mac as JR, Reeves GA, Prlic A title Integrating biological data the Distributed Annotation System. series 9 journal BMC Bioinformatics volume Suppl 8 pages S3 year 2008 pmid 18673527 doi 10.1186 1471 2105 9 S8 S3 pmc 2500094 ref It first originated as the work of Robin Dowell, Rodney Jokerst, Allen Day, Sean Eddy and Lincoln Stein , ref name pmid11667947 but it has since evolved into a community driven project with its main hub http www.biodas.org BioDAS . The current stable version of DAS is 2.0, which is also written as DAS 2 , whereas the older but still commonly used version 1.6 is abbreviated as DAS 1 . The latter DAS 2 specification is not compatible with DAS 1. ref name das2 http www.biodas.org wiki DAS 2 The DAS 2 Protocol ref Sites and tools currently using DAS http www.dasregistry.org The DAS registration server http www.ensembl.org Ensembl The Ensembl Genome Browser http genome.ucsc.edu UCSC Genome Browser http www.wormbase.org ... ProServer http supfam.org SUPERFAMILY SUPERFAMILY http www.ebi.ac.uk interpro InterPro DAS clients Distributed Annotation System Clients References Reflist External links Category Bioinformatics bioinformatics ... more details
Orphan date April 2012 noinclude This table of client computing client application software application s for the Distributed Annotation System has been created primarily for inclusion in its Distributed Annotation System parent page . The parent page puts the table in context, and you should go there for more information. The table is provided in a separate page so that it can be transcluded where necessary. Table follows noinclude class wikitable Name Description Links BioJava DAS Client Dasty A web client for visualizing protein sequence feature information using DAS http www.ebi.ac.uk dasty http www.ebi.ac.uk das srv uniprot dasty index.jsp?id Q24488 DasView A server side Perl application. This tool is mentioned in the original DAS publication, but has subsequently disappeared. EnsEMBL The EnsEMBL Genome Browser. Provides built in support for DAS http www.ensembl.org Geodesic An stand alone Java application http www.biodas.org geodesic Integrated Genome Browser IGB The Integrated Genome Browser IGB, pronounced ig bee is an application built upon the GenoViz SDK and Genometry for visualization and exploration of genomes and corresponding annotations from multiple data sources http genoviz.sourceforge.net Jalview A multiple sequence alignment editor & viewer http www.jalview.org OmniGene The user interface is based on the EnsEMBL interface http omnigene.sourceforge.net http sourceforge.net projects omnigene SPICE A browser for the annotations for protein sequences and structures http www.efamily.org.uk software dasclients spice http www.spice 3d.org http www.spice 3d.org dasobert STRAP Underlining sequence features in multiple alignments. Example output http www.charite.de bioinf strap exampleOutput.html http 3d alignment.eu The Institute for Genomic Research TIGR DAS Viewer http www.tigr.org tdb DAS dasview.html ? WormBase The WormBase genome Browser. Includes a DAS viewer named DASView includeonly small Edit this table small includeonly Category Bioinformatics ... more details
paper.pdf The ATSC Distributed Transmission System and Applications to Translator Service , David ... 15478 MTVA Gets Approval for NYC Distributed Transmission System , TV Technology, May 25, 2007 ref ... resources 2006 fcc comments opposition to digital tv distributed transmission system New ... Reading, Pennsylvania in December 2006, allowing it to operate a distributed transmission system ... permits a distributed transmission system, Harry C. Martin, Broadcast Engineering, Feb 1, 2007 ref ...otheruses4 terrestrial broadcasting electrical power distribution distributed generation In North American digital terrestrial television digital terrestrial television broadcasting, a distributed transmission system DTS or DTx is a form of single frequency network in which a single broadcast signal ... Television Transition Project ref A series of initial tests involving four distributed transmission ... journal title An ATSC DTV receiver with improved robustness to multipath and distributed transmission ... test results of a distributed translator network, and a case study for an application of distributed ... The new 2004 standards included A 110A, Synchronization Standard for Distributed Transmission, Revision ... storage networking atsc distributed transmission index1.html ATSC distributed transmission , Broadcast ... operations and maintenance distributed transmission packet OMP, packet identifier PID 0x1FFA would need ... system is subject to very strict limits on the maximum time difference between arrival of multiple versions ... all but one would receive at least the same signal quality as was observed without a distributed transmission system. ref http www.tvtech.com article 17696 SFN TV Broadcasting in The United States ... the use of distributed transmission systems by terrestrial DTV broadcasters, subject to various restrictions. ref http hraunfoss.fcc.gov edocs public attachmatch FCC 08 256A1.pdf FCC order on distributed ... analogue transmitters on the same frequency to cover various portions of the same island this system ... more details
Infobox software name DACS The Distributed Access Control System logo screenshot caption A light weight single sign on and role based access control system for web servers and server based software. collapsible author Developers at Distributed Systems Software developer Distributed Systems Software released latest release version 1.4.27b latest release date release date and age 2012 03 19 latest preview version latest preview date frequently updated Yes programming language C with APIs for some other languages operating system FreeBSD , Linux , Mac OS X size language English status production genre Computer security license Modified Sleepycat License website URL http dacs.dss.ca The Distributed Access Control System DACS is a light weight single sign on and role based access control system for web server s and Server computing server based software . DACS is primarily used with Apache HTTP Server Apache web servers to provide enhanced access control for web pages, Common Gateway Interface CGI programs and servlet s, and other web based assets, and to Federated identity federate Apache servers. Released under an open source license , DACS provides a modular authentication Software framework framework that supports an array of common authentication methods and a rule based authorization engine that can grant or deny access to resources, named by Uniform Resource Locator URLs , based on the identity of the requestor and other contextual information. Administrators can configure DACS to identify users by employing authentication methods and user accounts already available within their organization. The resulting DACS identities are recognized at all DACS jurisdictions that have been federated. In addition to simple web based Application Programming Interface APIs , Command line command line interfaces are also provided to much of the functionality. Development of DACS began ... Distributed Access Control System Dacs Category Cross platform free software Category Free security ... more details
refimprove date April 2007 A distributed parameter system as opposed to a linear lumped parameter lumped parameter system is a system whose state space controls state space is infinite dimension vector space dimensional . Such systems are therefore also known as infinite dimensional systems. Typical examples are systems described by partial differential equation s or by delay differential equation s. Linear time invariant distributed parameter systems Abstract evolution equations Discrete time With U , X and Y Hilbert space s and math A , math &isin L X , math B , math L U , X , math C , math &isin L X , Y and math D , math &isin L U , Y the following equations determine a discrete time linear time invariant system math x k 1 Ax k Bu k , math math y k Cx k Du k , math with math x , math the state a sequence with values in X , math u , math the input or control a sequence with values in U and math y , math the output a sequence with values in Y . Continuous time The continuous time case is similar to the discrete time case but now one considers differential equations instead of difference equations math dot x t Ax t Bu t , math , math y t Cx t Du t , math . An added complication now however is that to include interesting physical examples such as partial differential equations and delay differential equations into this abstract ... second DEFAULTSORT Distributed Parameter System Category Control theory de Systemeigenschaften ... in zero is the transfer function of some discrete time system. Continuous time If A generates ... condition is zero. The system is called exactly controllable in time n if the range of math Phi n math ... Phi t math is chosen. The system is called ref Tucsnak Definition 11.1.1 ref exactly controllable ... is the truncated output with initial condition x and control zero. The system is called exactly observable .... The system is called ref Tucsnak Definition 6.1.1 ref exactly observable in time t if there exists ... more details
About a specific protocol the general concept Distributedfilesystem IPstack Network FileSystem NFS is a distributedfilesystem protocol originally developed by Sun Microsystems in 1984, ref cite web ..., including the remote procedure call RPC system and the remote file access protocol. In the end, proposals for these two requirements, called respectively, the Distributed Computing Environment DCE , and the DCEDistributedFileSystemDistributedFileSystem DFS won over Sun s proposed ONC and NFS ... DCE as the RPC and derived from the Andrew FileSystem Andrew FileSystem AFS . 1990s Sun Microsystems .... The Network FileSystem is an open standard defined in Request for Comments RFC s, allowing anyone ... in RFC 3530, April 2003 , influenced by Andrew FileSystem AFS and CIFS , includes performance ... The byte range advisory Network Lock Manager NLM protocol added to support UNIX System V file ... filesystem QFileSvr.400 . SMB and NetWare Core Protocol NCP occur more commonly than NFS on systems ..., Sun and AT&T had previously competed over Sun s NFS versus AT&T s Remote FileSystem RFS , and the quick ... parallelism. The NFSv4.1 protocol defines a method of separating the metadata Filesystem metadata ... protocol Kerberos Network Information Service Remote FileSystem Samba software Samba Server Message Block Andrew FileSystem Secure Shell Filesystem mount a remote directory using only a ssh login ... References reflist External links RFCs RFC 5661 Network FileSystem NFS Version 4 Minor Version ... http www.ietf.org html.charters nfsv4 charter.html IETF Network FileSystem Version 4 nfsv4 ... Microsystems DEFAULTSORT Network FileSystem Protocol Category Internet protocols Category Network ... Category Application layer protocols ca Network FileSystem cs Network FileSystem de Network FileSystem es Network FileSystem eu NFS fr Network FileSystem ko it Network FileSystem he Network FileSystem hu NFS ml nl Network FileSystem ja Network ... more details
FileSystem heavily influenced Version 4 of Sun Microsystems popular Network FileSystem protocol Network FileSystem NFS . Additionally, a variant of AFS, the DCEDistributedFileSystemDistributedFileSystem DFS was adopted by the Open Software Foundation in 1989 as part of their Distributed ...The Andrew FileSystem AFS is a distributedfilesystemdistributed networked filesystem which uses a set of trusted servers to present a homogeneous, location transparent file name space to all the client ...., Sidebotham, R.N., & West, M.J. title Scale and Performance in a DistributedFileSystem journal ACM ... ref has several benefits over traditional networked filesystem s, particularly in the areas ... environment. It leads, for example, to the use of a single file per message in the original email system for the Andrew Project, the Andrew Message System, rather than a single file per mailbox. See file ... Business Machines IBM , OpenAFS and Arla filesystem Arla , although the Transarc software is losing support and is deprecated. AFS version two is also the predecessor of the Coda filesystem Coda filesystem. A fourth implementation exists in the Linux kernel Linux kernel computer science kernel ... Network file systems Category Carnegie Mellon University Category Distributedfile systems de Andrew FileSystem es Andrew FileSystem fr Andrew FileSystem it Andrew filesystem ja Andrew FileSystem pl Andrew FileSystem sv Andrew filesystem ... and Andrew W. Mellon Andrew Mellon . Its primary use is in distributed computing . Features AFS ... requests for the same file. This also allows limited filesystem access in the event of a crash computing server crash or a network outage . Read and write operations on an open file are directed only to the locally cached copy. When a modified file is closed, the changed portions are copied back to the file ... a file is cached, the server makes a note of this and promises to inform the client if the file ... more details
DCE RPC , short for Distributed Computing Environment Remote Procedure Calls , is the remote procedure call system developed for the Distributed Computing Environment DCE . This system allows programmers to write distributed software as if it were all working on the same computer, without having to worry about the underlying network code. History DCE RPC was commissioned by the Open Software Foundation ... System NCS and then a major part of DCE RPC itself. The naming convention for transports that can be designed as architectural plugins and then made available to DCE RPC echoes these origins, e.g. ncacn np Server Message Block SMB Named Pipes transport ncacn tcp DCE RPC over TCP IP and ncacn http to name a small number. DCE RPC s history is such that it s sometimes cited as an example of design ... for retrieving WMI data for system monitoring. http jarapac.sourceforge.net Jarapac DCE RPC in Java ... of features that target large distributed systems and which are often unmatched by more recent RPC implementations such as SOAP . Software License Previously, the DCE source was only available .... The Open Group has stated it will work with the DCE community to make DCE available to the open ... site. ref http www.opengroup.org comm press 05 01 12.htm ref DCE RPC s Reference implementation computing ... OSF 1.0 license, and is still available for at least Solaris, AIX and VMS. DCE is also still ... in the National Insurance NIRS UK s National Insurance Recording System NIRS 2 . ref The Open ... FreeDCE is the DCE 1.1 reference implementation ported to Linux, supports 64 bit platforms, and is autoconf ... licensed the Open Software Foundation OSF s entire DCE 1.2.2 source code and ported it to Win32, creating a product called PC DCE see http support.entegrity.com private pcdce32.asp Microsoft s version of DCE RPC, called MSRPC , is integrated into Windows NT . MSRPC is derived from the DCE 1.1 ..., Likewise Software released an implementation of the DCE 1.1 reference. http www.j interop.org J ... more details
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