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Topic: Distributed filesystem

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	Distributed Filesystems for Linux (Site not responding. Last check: 2007-10-18)
		All distributed filesystems are intrinsically based on the client/server model in order to differentiate between the systems that permanently store data and the systems that simply use that data.
		Distributed filesystems provide users with the freedom to access their information from any client system on which they can log in and have access to the resources provided by a server over the network.
		Distributed filesystems provide central locations for data that must or should be shared by, or available to, all users.
	www.informit.com /articles/article.asp?p=26944&seqNum=1 (884 words)

	[No title]
		Distributed filesystems exacerbate these difficulties, especially when the network is composed of a large number of heterogeneous machines.
		Since distributed filesystems work by transmitting their activity over a network, one can collect traces of such systems by placing a "tap" on the network and observing the network traffic.
		Filesystem operations may span several packets, and may be meaningful only in the context of other, previous operations.
	www.usenix.org /events/samples/submit/abstract (1875 words)

	[No title]
		In traditional local filesystems some component of the system, typically in the OS, is passed a text string pathname and resolves it to some internal identifier of the named file.
		The filesystem name resolver must be able to cope with composite pathnames to the extent that it must be able to resolve the non-filesystem part of the pathname into the internal identifier needed to do its real work.
		The distributed filesystem can simply be treated like a local filesystem that happens to go to the network instead of a local disk to do its work.
	www.opengroup.org /rfc/mirror-rfc/rfc18.0.txt (6891 words)

	Introduction
		Filesystems have been historically one of the first services to be distributed over a network (see Sun's NFS [13]).
		In a distributed filesystem, we have two types of actors: servers which have direct access to a local filesystem and clients that wish to access files on filesystems local to the server.
		Encrypting and decrypting data in a distributed filesystem does not guarantee that the data is not exposed to an unauthorized party.
	www.usenix.org /event/usenix01/freenix01/full_papers/cattaneo/cattaneo_html/node2.html (550 words)

	Distributed Scratch Space - Office of Information Technologies - University of Notre Dame (Site not responding. Last check: 2007-10-18)
		A distributed scratch space is now available on a test basis on all HPCC systems (SGI, Sun, IBM Linux).
		Since it is distributed you can see files in /dscratch as they are written on a remote (non-interactive) system.
		For distributing the /dscratch filesystem to the HPCC systems, a dedicated high performance gigabit(Gb) network is used (except for the stats machine which uses it's 100 Mb interface).
	www.nd.edu /~ais/apptech/ndoit/www/research_computing/news/distributedscratchspace.shtml (363 words)

	rfc1082 - RFC - Know24.com - The Free Universal Encyclopedia and Learning Resource
		In some cases, the interest group, instead of being distributed directly to its subscribers, is put into a digest format by the moderator and then sent to the subscribers.
		Although subscription to an group does indicate interest on the part of a subscriber, it is usually not interesting to get 50 messages or so delivered to the user's private maildrop each day, interspersed with personal mail, that is likely to be of a much more important and timely nature.
		Third, if a subscriber on the distribution list for a group becomes "bad" somehow, the originator of the message and not the moderator of the group is notified.
	www.know24.com /encyclopedia/rfc/rfc1082.html (2756 words)

	The Scope of Network Distributed Computing (Site not responding. Last check: 2007-10-18)
		NFS is not so much a filesystem as it is a collection of protocols that collectively give rise to a client-perspective distributed filesystem.
		Filesystem interfaces have, for the most part, been abstracted from operating system interfaces to traditional local filesystems to transparently offer distributed filesystem capabilities.
		Either multiple nodes access a filesystem managed by a single node, or the data in a filesystem is distributed across several nodes.
	www.informit.com /articles/article.asp?p=170935&seqNum=15 (553 words)

	What is a Cluster Filesystem? (Site not responding. Last check: 2007-10-18)
		Distributed filesystem - the generic term for a client/server or "network" filesystem where the data isn't locally attached to a host.
		There are lots of different kinds of distributed filesystems, the first ones coming out of research in the 1980s.
		Cluster filesystem - a distributed filesystem that is not a single server with a set of clients, but instead a cluster of servers that all work together to provide high performance service to their clients.
	www.beedub.com /clusterfs.html (609 words)

	Project Ideas
		This is because a distributed file system always assumes that the user wants the most recent view of the data.
		Distributed Access Control Lists Filesystems such as AFS allow users to create groups and access control lists, detailing who is allowed to access what files.
		Build a distributed (peer-to-peer?) backup system for ordinary workstations, assuming that no one machine is willing to accept all backups.
	www.cse.nd.edu /courses/cse498z/www/ideas.html (1130 words)

	LinuxPlanet - Tutorials - The Coda Distributed Filesystem for Linux - Introduction to Coda
		This article explores the Coda distributed filesystem that provided much of the inspiration for InterMezzo and which is also readily available for Linux.
		Coda is a well-established distributed filesystem that was developed at Carnegie-Mellon University, is actively in use there, and is also still actively under development.
		Satyanarayanan, the Coda filesystem project is focused on specific distributed filesystem functionality required for mobile computing, such as support for disconnected operation.
	www.linuxplanet.com /linuxplanet/tutorials/4481/1 (615 words)

	NFS - the network filesystem
		NFS was historically the first distributed filesystem to be implemented, by Sun Microsystems.
		A lock is obtained from a lock server on the host where the real disk filesystem lies and the state of the filesystem is commuicated by a state server.
		The state of the filesystem on the server is maintained on the server which owns the filesystem.
	home.lanet.lv /~sd70058/aboutos/node154.html (383 words)

	LinuxPlanet - Reports - Using the InterMezzo Distributed Filesystem - Getting Connected in a Disconnected World
		Monday, August 12, 2002 11:53:57 AM All distributed filesystems provide access to storage that is located on remote systems, known as servers, and enable authorized users to transparently read and write data there over the network.
		Disconnected operation is the interesting case when you need to work on files that are located in a distributed filesystem while you are not actually connected to the network.
		A better solution to this problem is a distributed filesystem such as InterMezzo, which transparently caches the files that you are working on from the InterMezzo server.
	www.linuxplanet.com /linuxplanet/reports/4368/1 (627 words)

	1999 Linux Symposium: intermezzo
		Advances in clustering, failover systems, and distributed data storage are some of the important developments in storage software technology made during the last several years.
		Commercial filesystems such as AFS and those sold by Veritas remain too costly for individual users, and free projects like Coda--though impressive--are not ready for production use.
		This allows operations to proceed at nearly the speed of the local disk filesystem, while journalled modification logs can be optimised and lazily shipped to the server in the background.
	www.linuxsymposium.org /1999/intermezzo.php (550 words)

	Wikipedia: Wikipedia
		However, these works were rarely available to more than specialists: they were expensive, and written for those extending knowledge rather than (with some exceptions in medicine) using it.
		The modern idea of the general purpose widely distributed printed encyclopedia goes back to just a little before Denis Diderot and the 18th century encyclopedists.
		To increase speed further, rendered pages for anonymous users are cached in a filesystem until rendered invalid, allowing page rendering to be skipped entirely for most common page accesses.
	www.factbook.org /wikipedia/en/w/wi/wikipedia_1.html (1683 words)

	The Coda Distributed File System
		The Coda distributed file system is a state of the art experimental file system developed in the group of M. Satyanarayanan at Carnegie Mellon University.
		A distributed file system stores files on one or more computers called servers, and makes them accessible to other computers called clients, where they appear as normal files.
		Microsoft's new distributed file system (dfs) provides glue to put all server shares in a single file tree, similar to the glue provided by auto-mount daemons and yellow pages on Unix.
	www.coda.cs.cmu.edu /ljpaper/lj.html (3542 words)

	Brown CS: Talk
		A conventional but inadequate solution is to couple a stock batch system to a stock distributed filesystem.
		This approach is limited in scalability and reliability and has forced users to either limit their data needs or distribute data manually.
		By moving control from the core to the edge, BAD-FS is able to solve several perennial problems in distributed computing, such as space allocation, consistency management, and the safety-performance tradeoff.
	www.cs.brown.edu /events/talks/thain.html (179 words)

	Storage Taxonomy
		If the server offers a simple file access interface to clients, the organization is known as a distributed filesystem.
		Provided that the distributed filesystem is reorganized to logically “DMA” data rather than copy it through its server, a fourth organization (4) reduces the number of network transits for data to two.
		This system also applies where clients are trusted to maintain filesystem metadata integrity and implement disk striping and redundancy.
	www.pdl.cmu.edu /NASD/taxonomy.html (618 words)

	Ext2fs Home Page
		It unfortunately is limited to filesystems smaller than 2GB, and is heavily Intel byte order dependent, and has apparently been abandoned by its original author.
		MountX, MacOS driver which allows you to mount ext2 filesystems (Linux and MkLinux) on the Macintosh.
		Backports of recent enhancements of the ext2/3 filesystems from 2.5 to the 2.4 kernel.
	e2fsprogs.sourceforge.net /ext2.html (235 words)

	Technologies: 'P2P lives on in a worldwide distributed filesystem'. (Site not responding. Last check: 2007-10-18)
		Back in 2001, if not earlier, companies were marketing filesystems that offered far greater robustness, scalability, and (perhaps) performance than traditional distributed filesystems such as NFS.
		Now Internet2 is offering such a filesystem across all the dozens of universities that are part of its network.
		That means Logistical Networking could become the first mass phenomenon in the next generation of distributed filesystems.
	www.reppel.co.uk /technologies/p2p-lives-on-in-a-worldwide-distributed-filesystem.html (423 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Distributed data storage can beflexiblyarchitected to enable global access to data, live-data redundancy, often involving geographical distributed live-data stores, and remote backup, including hot- backup, of critical data.
		Client encryption, either application or filesystem based, ensures that client data is encrypted local to the client prior to network transport.
		change or revoke access by any client to objects stored by the distributed filesystem, the objects must be successfully read and then re-encrypted with different keys.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=03/49361.030612&ELEMENT_SET=DECL (9761 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Explicit Control in a Batch-Aware Distributed Filesystem Douglas Thain University of Wisconsin - Madison Thursday, February 19, 4:00 p.m.
		A conventional but inadequate solution has been to couple a stock batch system to a stock distributed filesystem.
		This approach is limited in scalability and reliability and forces users to either limit their data needs or distribute data manually.
	www.cs.wm.edu /cspages/events/03-04/thain.txt (255 words)

	Distributed File System
		The Microsoft® Distributed File System (Dfs) is a network server component that makes it easier for you to find and manage data on your network.
		Dfs is a means for uniting files on different computers into a single name space, making it easy to build a single, hierarchical view of multiple file servers and file server shares on your network.
		Microsoft Distributed File System does for servers and shares what file systems do for hard disks.
	www.microsoft.com /windows2000/techinfo/howitworks/fileandprint/dfsnew.asp (444 words)

	Das Deutsche Linux Virtual Server Projekt
		Super Sparrow, is to balance traffic among geographically distributed points by finding the site close to clients based on BGP routing information.
		Intermezzo, a lightweight efficient distributed filesystem and a complete redesign under the inspiration of Coda.
		GFS - the Global Filesystem, an efficient distributed and fault-tolerant filesystem with the cool dlock implementation (hardware related).
	www.lvserver.de /german/links.html (266 words)

	SSH Filesystem (Site not responding. Last check: 2007-10-18)
		This is a filesystem client based on the SSH File Transfer Protocol.
		On the client side mounting the filesystem is as easy as logging into the server with ssh.
		The idea of sshfs was taken from the SSHFS filesystem distributed with LUFS, which I found very useful.
	fuse.sourceforge.net /sshfs.html (220 words)

	OpenAFSFileServing (Site not responding. Last check: 2007-10-18)
		Open AFS provides access to a UNIX stored distributed filesystem via a hierarchical tree.
		It is possible to assign multiple administrators to different top level filesystem trees or parts of filesystem trees.
		It is possible ot allow users to create shared spaces within the distributed filesystem.
	faculty.adams.edu /~cdmiller?OpenAFSFileServing (75 words)

	Questions (Site not responding. Last check: 2007-10-18)
		Note that WP4 will provide a tool for distributing application software within a fabric so that a distributed filesystem is not neccessary for this task.
		The grid is expected to increase, and not decrease, the functionalities available for distributed computing: thus the basic functionalities provided today by afs have to be granted, for M21 if possible.
		is always on a distributed filesystem spanning the fabric, and this
	datagrid-wp8.web.cern.ch /DataGrid-WP8/Documents/Responses/ATF/q3answers.htm (4979 words)

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