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Topic: InterMezzo (file system)

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	InterMezzo File System Project
		InterMezzo consists of three components: a kernel module, InterMezzo, which adds a new file system to the kernel, and a user level synchronization client called intersync which incorporates a file server, for which we use Apache.
		InterMezzo merely wraps itself around this local file system to manage moving data from servers to clients and vice versa.
		InterMezzo was started in the Fall of 1998 at CMU by Peter with serious help from Michael Callahan, in an attempt to see if some of Coda's achievements could be reached with a much simpler design and implementation.
	www.inter-mezzo.org /project.html (586 words)

	Intermezzo - Wikipedia, the free encyclopedia
		The intermezzo, in the 18th century, was a comic operatic interlude inserted between acts or scenes of an opera seria.
		In the 19th century the intermezzo acquired another meaning: an instrumental piece which was either a movement between two others in a larger work, or a character piece which could stand on its own.
		In this sense an intermezzo is similar to the entr'acte.
	en.wikipedia.org /wiki/Intermezzo (502 words)

	InterMezzo (file system) - Wikipedia, the free encyclopedia
		InterMezzo is a distributed file system written for Linux, distributed with a GPL licence.
		InterMezzo was started as part of the Coda file system project at Carnegie Mellon University and takes many design decisions from Coda.
		InterMezzo is apparently no longer under development, and its developers have moved on to a new project named Lustre.
	en.wikipedia.org /wiki/InterMezzo_(file_system) (373 words)

	File
		File verification File verification is the field of computer science in which an algorithm is used to verify the integri...
		Hierarchical File System HFS is an acronym for Hierarchical File System.
		Jargon File The Jargon File is a compendium of Worcester Polytechnic Institute (WPI).
	www.brainyencyclopedia.com /topics/file.html (1664 words)

	File replication with the InterMezzo File System
		InterMezzo is at present a prototype, and the first target for the system is to do reliable directory replication between two nodes, on a secure system area network.
		File sets are groups of files that form a sub-tree of the InterMezzo name space, and which are typically much bigger than a single directory and much smaller than an entire disk partition.
		The file set location database is implemented as a sparse tree of directories, handled as a special object in the file system.
	off.net /cv/papers/intermezzo.html (4102 words)

	LinuxPlanet - Reports - Using the InterMezzo Distributed Filesystem - Getting Connected in a Disconnected World
		These systems typically access files stored on a network while they are in use on one's desktop, but also need to be able to continue to work on these same files when using the laptop at home or when on the road in order to maximize productivity.
		In this case, caching means that InterMezzo makes a copy of the files that you are working on, stores them on a local partition that has been configured for use as a cache, and then synchronizes changes to the cached files with the original file on the InterMezzo server.
		InterMezzo's synchronization mechanism is analogous to the "Offline Files" or "Briefcase" mechanisms provided in most modern versions of Microsoft Windows--except, of course, that InterMezzo is free and you can use it on a true multi-user system such as Linux.
	www.linuxplanet.com /linuxplanet/reports/4368/1 (500 words)

	Software
		GPFS: GPFS (General Parallel File System) is a high performance parallel, scalable file system for clusters.
		InterMezzo: InterMezzo is a distributed file system with a focus on high availability, offering various features like disconnected operation and automatic recovery from network outages.
		Lustre: Lustre is a novel storage and file system architecture that aims at building a next-generation cluster file system, to service clusters with 10,000s of nodes, petabytes of storage, and move 100s of GB/sec, as well as offering security and management.
	lcic.org /software.html (1308 words)

	Encyclopedia: Linux kernel (Site not responding. Last check: 2007-10-20)
		A complete system built around the Linux kernel is commonly known as the Linux operating system, although some prefer to call the system GNU/Linux and there is some controversy on the point.
		Network File System (NFS) is a protocol originally developed by Sun Microsystems in 1984 and defined in RFCs 1094, 1813, (3010) and 3530, as a distributed file system which allows a computer to access files over a network as easily as if they were on its local disks.
		See Filing system for this term as it is used in libraries and offices In computing, a file system is a method for storing and organizing computer files and the data they contain to make it easy to find and access them.
	www.nationmaster.com /encyclopedia/Linux-kernel (8966 words)

	InterMezzo File System Home
		InterMezzo will be suitable for replication of servers, mobile computing, managing system software on large clusters, and for maintenance of high availability clusters.
		Intersync is a new client server system that we have started to put together, it periodically polls the server and integrates any changes made into the client file system.
		InterMezzo was deeply inspired by the Coda File System, but totally re-designed and re-engineered.
	www.inter-mezzo.org (194 words)

	DFS - The Distributed File System (Site not responding. Last check: 2007-10-20)
		Unlike most network file systems which operate in a client/server model where one or more servers keep the master copy and the clients just access it, DFS in actually a peer-to-peer file system with the ability to handle disconnected operation.
		When a file is created or modified, it instantly informs all DFS machines of the change and opens itself to send the new version to others.
		Each machine will keep the files it uses the most and perhaps a few others, leaving the remaining files to be stored on other machines but always ensuring that any given file is held by a minimum number of hosts.
	dfs.sourceforge.net (464 words)

	NewsForge \| Linux needs better network file systems (Site not responding. Last check: 2007-10-20)
		By their very nature, network file systems are superimposed on top of the local file system; without a local file system already in place, there is nothing the network file system can identify to mount over the network.
		Intermezzo has been developed by kernel hacker, file system guru, and former Coda project member Peter Braam.
		There is a server element to the file system, and a client element, with the client side relying on a persistent cache to keep files in synch.
	software.newsforge.com /software/04/11/29/1528259.shtml?tid=92&tid=2&tid=6&tid=91&tid=138&tid=119&tid=11 (3143 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.
		Furthermore, all of the semantic decisions that the file server makes during these processes are cleanly separated from the rest of the code, allowing one to customize InterMezzo behaviour for a certain task or environment.
		InterMezzo is fundamentally different from systems like NFS in using a write-back cache, avoiding synchronous interactions with the server.
	www.linuxsymposium.org /1999/intermezzo.php (550 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		In the first few labs, you have to install the InterMezzo File System, which maintains replicas of folder collections residing on multiple computers.
		The file system keeps these replicas in sync by building a log of modifications and propagating that log to other nodes.
		InterMezzo has a disconnected opeation, which maintains a log to remember all updates that need to be forwarded when a fialed communication channel comes back.
	www.csci.csusb.edu /tongyu/courses/cs660/labs/lab12.php (197 words)

	PVFS: A Parallel File System for Linux Clusters1
		These file systems are designed to provide distributed access to files from multiple client machines, and their consistency semantics and caching behavior are designed accordingly for such access.
		First, it forced system administrators to mount the NFS file system across all nodes in the cluster, which was a problem in large clusters because of limitations with NFS scaling.
		MPI-IO on a parallel file system for cluster of workstations.
	www.parl.clemson.edu /pvfs/el2000/extreme2000.html (5217 words)

	InterMezzo (file system) -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		InterMezzo is a (Click link for more info and facts about distributed file system) distributed file system written for (An open-source version of the UNIX operating system) Linux, distributed with a (Click link for more info and facts about GPL) GPL licence.
		InterMezzo is designed to work with (Click link for more info and facts about journaling filesystem) journaling filesystems such as (Click link for more info and facts about EXT3) EXT3, (Click link for more info and facts about JFS) JFS, (Click link for more info and facts about ReiserFS) ReiserFS
		InterMezzo was started as part of the (The closing section of a musical composition) Coda file system project
	www.absoluteastronomy.com /encyclopedia/i/in/intermezzo_(file_system)1.htm (325 words)

	Linux Links - The Linux Portal: Kernel/File_Systems
		File System Translator: a set of stackable file system templates for each operating system, and a high-level language that can describe stackable file systems in a cross-platform portable fashion.
		NOOFS is a project which aims at creating an innovative file system, whose source code is distributed under the terms of the GNU General Public License.
		Parallel Virtual File System: a user-space parallel file system for use on clusters of PCs (and Beowulfs in particular).
	www.linuxlinks.com /Kernel/File_Systems/index.shtml (1782 words)

	Filesystems HOWTO
		System V semantics are a bit more complex: if a directory has the setgid bit set, new files inherit the group id of the directory and subdirectories inherit the group id and the setgid bit; in the other case, files and subdirectories are created with the primary group id of the calling process.
		They also describe the Macintosh Hierarchical File System and their implementation and note that the design is not well suited to reentrancy and that its complex data structures can lead to slow implementations in multiprogrammed environments.
		Files in these directories (as well as their pathname components) are transparently encrypted and decrypted with the specified key without further user intervention; cleartext is never stored on a disk or sent to a remote file server.
	www.ibiblio.org /pub/Linux/docs/HOWTO/other-formats/html_single/Filesystems-HOWTO.html (9405 words)

	InterMezzo File System Project
		Alan Cox on InterMezzo in NewsForge Alan has hopes that InterMezzo may be the future "company filesystem".
		InterMezzo has been added to the Linux -ac series and is in Linux 2.4.8-ac4.
		The stable versions of InterMezzo for Linux 2.2 are available and have seen substantial testing.
	www.inter-mezzo.org /news.html (335 words)

	File Systems
		This is a most interesting project; the author has been benchmarking a file system that stores both inodes and data blocks as a balanced tree.
		Moreover, porting file system code from one operating system to another is almost as difficult as the first port.
		These proposals, however, advocated massive changes to existing operating system interfaces and existing file systems; operating system vendors and maintainers resist making any large changes to their kernels because of stability and performance concerns.
	cbbrowne.com /info/fs.html (3798 words)

	HantsLUG Wiki: LinuxHints/InterMezzo
		The InterMezzo "server" monitors for changes to its exported filesystem which are then replicated out to the clients.
		InterMezzo is developed on (and tested against) RedHat systems, and this sometimes leads to problems when trying to use it with Debian.
		The InterMezzo documentation says that any CGI-enabled webserver should be capable of working with InterMezzo, but they suggest either [Apache] or [ghttpd].
	www.hants.lug.org.uk /cgi-bin/wiki.pl?LinuxHints/InterMezzo (1357 words)

	Peter Braam: The Intermezzo FileSystem (Site not responding. Last check: 2007-10-20)
		InterMezzo is a Linux file system geared towards replicating caches.
		A replicating set of caches cache might be your home directory on a laptop and desktop, or the system images in a 4000 node Linux cluster.
		To replicate InterMezzo uses a novel kernel file system driver (in C), several of Coda's protocols, and user level code currently written in Perl.
	www.cs.cmu.edu /afs/cs.cmu.edu/user/lenzo/html/pgh.pm/talkabstracts/braam-17-5-2000.html (252 words)

	SDI/LCS Seminar Series (Site not responding. Last check: 2007-10-20)
		A single, petabyte scale Lustre file system will be deployed at LLNL early 2005 to provide the BlueGene super computer and some 10 other clusters with scalable file storage.
		Peter Braam is founder and president of Cluster File Systems, Inc., which has developed the Lustre file system that now powers many of the worlds largest super computers and has achieved outstanding bandwidth and scalability goals.
		Peter is a specialist in distributed file systems, best known for his work on the Lustre project and on the Coda and InterMezzo file systems, which won awards at LinuxWorld and the Open Source Convention in 1999.
	www.pdl.cmu.edu /SDI/2004/100704.html (263 words)

	Mountain View launches distributed file system, 12/08/00
		Dubbed InterMezzo, the software synchronizes active file systems across multiple servers in environments that are only intermittently connected.
		InterMezzo provides data access in Web and file server environments and can offload backbone traffic in geographically separated data centers.
		It wraps around an existing journaling disk file system and tracks updates made to folders and files, and then writes log records that detail activities.
	www.networkworld.com /news/1208mview.html (292 words)

	Dynamic Metadata Management for Petabyte-scale File Systems (ResearchIndex)
		Abstract: In petabyte-scale distributed file systems that decouple read and write from metadata operations, behavior of the metadata server cluster will be critical to overall system performance and scalability.
		52 Scalability in the XFS file system - Sweeney, Doucette et al.
		5 The intermezzo file system - Braam, Callahan et al.
	citeseer.ist.psu.edu /698264.html (563 words)

	Lustre: scalable, secure, robust, highly-available cluster file system
		Lustre is a scalable, secure, robust, highly-available cluster file system.
		The central goal is the development of a next-generation cluster file system which can serve clusters with 10,000's of nodes, petabytes of storage, move 100's of GB/sec with state of the art security and management infrastructure.
		Cluster File Systems, Inc. Public Open Source releases of Lustre are made under the GNU General Public License.
	www.lustre.org (205 words)

	Anthony Barker's Weblog on Linux, Technology & the Economy: Ray Ozzie on Webservices
		Intermezzo is the file system I would love to try out if I had some time - sounds impressive.
		The file system sends a request to search for it (from another file system or tape backup system).
		So in effect you are requesting a pointer to a file which can reside anywhere.
	www.xminc.com /mt/archives/000060.html (268 words)

	Peter Braam's Abstract (Site not responding. Last check: 2007-10-20)
		In this talk I'd like to relate some of the clustering and file system efforts that are under way in the Linux community.
		He is currently actively working on the InterMezzo file system, cluster file systems and distributed lock managers for Linux as well as object based storage management software.
		He is mostly working for Stelias Computing, but also a part time faculty member at CMU and cluster and file systems architect at Red Hat Software.
	www.pdl.cmu.edu /SDI/1999/braamF99.html (229 words)

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