Record oriented filesystem

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Topic: Record oriented filesystem

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	Files-11 - Wikipedia, the free encyclopedia
		RMS is an example of a record-oriented filesystem.
		Each file in the VMS filesystem may be thought of as a database, containing a series of records, each of which has one of more individual fields.
		The filesystem is therefore organised in a tree-like structure.
	en.wikipedia.org /wiki/OpenVMS_filesystem

	Computer file - Wikipedia, the free encyclopedia
		Some operating systems, such as UNIX, do not handle file records at the operating system level, instead it is done at the application level.
		On most systems, the application or a library creates the "record" abstraction from the byte stream according to the file format.
		Some operating systems use an extension (or " suffix ", although the extension does not have to be placed at the end of the filename -- some systems may place it before the filename, for example) to differentiate between files whose contents or data are organized in different formats.
	en.wikipedia.org /wiki/Computer_file

	Files & records
		In fact as byte-oriented filesystems become dominant, database vendors are driven to write their own filesystems.
		Records are prefixed by a count field indicating the number of bytes in the record.
		Segmented records are the default type on VMS when writing unformatted sequential files with a sequential access, this is probably because the VMS count field is only 2 bytes long, is treated as a signed integer, and counts bytes, so the maximal length of a single counted variable size record is quite small.
	www.ibiblio.org /pub/languages/fortran/ch5-4.html

	Network Appliance - NFS Backgrounder
		A local filesystem may be exported to a specific host, to all hosts that match a subnet mask, or to all other hosts (the world).
		Although the new file has the same filesystem identifier and inode number, it is a completely different file from the one that the previous file handle referenced.
		By contrast, the client end of a network filesystem must have ways to handle processes that are accessing remote files when the client is still running, but the server becomes unreachable or crashes.
	www.netapp.com /tech_library/nfsbook.html

	rfc1094.txt
		On a local filesystem, a user can open a file and then change the permissions so that no one is allowed to touch it, but will still be able to write to the file because it is open.
		The filesystem name is in "filesys", and the group name is in the list "groups".
		Each "entry" contains a "fileid" which consists of a unique number to identify the file within a filesystem, the "name" of the file, and a "cookie" which is an opaque pointer to the next entry in the directory.
	www.ietf.org /rfc/rfc1094.txt

	Linux: record
		By default record records until stopped by a signal (by typing ^C for example).
		record will continue with a new file once the limit is reached.
		This should be the one where you can adjust the record level for your audio source.
	www.linuxforum.com /man/record.1.php

	Embedded.com - How to Build a Multimedia Filesystem
		It is generally a good idea that a version number be associated with each format so that subsequent versions of filesystem software may be backward compatible and allow users to continue viewing their previously recorded material.
		To be useful for multimedia record and playback, the device's platform must have an operating system, device drivers, multimedia codecs, a user interface for selecting the data to be played, and many other complex or expensive-to-develop components.
		A multimedia filesystem needs to handle such a large volume of high-speed data in a consumer-priced platform that the engineering tradeoffs are almost endless.
	www.embedded.com /story/OEG20030224S0034

	man: dd
		A truncated input block is one where a vari- able length record oriented conversion value was specified and the input line was too long to fit in the conversion record or was not newline ter- minated.
		The conversion record size is required by the record oriented conversion val- ues.
		The length of the input records is specified by the cbs op- erand.
	www.hmug.org /man/1/dd.php

	Slashdot How To Implement A Database Oriented File System
		IBM's AS/400 (a midrange computer system targeted for commercial use/accounting/warehouse/etc...) is based on an object-oriented database filesystem which is implemented at the firmware level (SLIC) rather than at the OS-level - and this system has been around for about 20 years and IIRC it always had quite good performance.
		Records are variable length and seperated by upper acsii characters.
		FAT is not the most restrictive filesystem either, as at least it has file Hierarchy data (directories or folders).
	slashdot.org /articles/02/03/30/1445257.shtml?tid=87

	Record Management Services - Wikipedia, the free encyclopedia
		Record Management Services (abbreviated RMS) are procedures in the VMS operating system that programs call to process files and records within files.
		RMS allows programs to issue GET and PUT requests at the record level (record I/O) as well as read and write blocks (block I/O).
		VMS RMS is an integral part of the system software; its procedures run in executive mode.
	en.wikipedia.org /wiki/Record_Management_Services

	db_recover(1) - Waikato Linux Users Group
		For example, catastrophic failure includes the case where the disk drive on which either the database or logs are stored has crashed, or when filesystem recovery is unable to bring the database and log files to a consistent state with respect to the filesystem.
		__Filesystem operations, e.g., moving the database environment to a different machine or file creation, deletion or renaming, cannot be transaction protected.__ For this reason, db_recover cannot re-create, delete or rename files as part of recovery.
		Generally, it is simplest to perform filesystem operations at the same time as making a snapshot of the database.
	www.wlug.org.nz /db_recover%281%29

	Linux: perlvar
		If you're not reading from a record-oriented file (or your OS doesn't have record-oriented files), then you'll likely get a full chunk of data with every read.
		On VMS, record reads are done with the equivalent of "sysread", so it's best not to mix record and non-record reads on the same file.
		If a record is larger than the record size you've set, you'll get the record back in pieces.
	www.linuxforum.com /man/perlvar.1.php

	Filesystem Hierarchy Standard - Version 2.2 final
		While you may have the root filesystem on a large partition, and may be able to fill it to your heart's content, there will be people with smaller partitions.
		A small root filesystem is less prone to corruption as the result of a system crash.
		This document specifies a standard filesystem hierarchy for FHS filesystems by specifying the location of files and directories, and the contents of some system files.
	www.pathname.com /fhs/2.2/single.html

	LWN: The future of the Linux filesystem
		The Reiser4 filesystem, which is in testing now, adds features like built-in transactions, even better small file performance, and a well-developed plugin architecture which makes it easier to add advanced features to the filesystem.
		GNOME Storage project plans to "replace the traditional filesystem with a new document store," but, in fact, it is built on top of existing filesystems and operates entirely in user space.
		Naming System Venture paper describes a world where filesystems impose no structure on data, leaving that task instead to the user.
	lwn.net /Articles/56923

	JCADG1
		Records are in the reverse order as they were inserted into the file-the last inserted record is identified as record number one.
		The records in the file are kept in the order they were inserted, that is, the first inserted record is record number one.
		The records in a linear file may be fixed or variable in length, as pictured in FIGURE 5-1.
	java.sun.com /products/javacard/AppletDevelopersGuide.html

	Default database / namespace
		The rest of the links are the same, as the file oriented namespace takes things based on thier alleged type, not on the query.
		I understand that persistence means that a lot of current uses of the filesystem in acl based systems are no longer required.
		In this way, efficient storage of things as either records or byte streams can be achieved.
	www.eros-os.org /pipermail/eros-arch/2000-July/002228.html

	OpenVMS - Iridis Encyclopedia
		OpenVMS has a very rich filesystem, with support for stream and record-oriented IO, ACLs, file versioning, etc.
		RMS - Record Management Services - high-level, language/device-independent IO.
		OpenVMS itself is implemented in a large variety of different languages (such as BLISS, VAX Macro, Ada, PL/I, C, Fortran, Basic, and several others), in contrast to a system such as Unix which is implemented nearly entirely in the C language.
	www.iridis.com /OpenVMS

	machine.h
		The default format for text files is variable ** length records and for binary files, fixed length records.
		The default format for text files ** is variable length records and for binary files, fixed length records.
	www.tex.ac.uk /ctan/tools/vvcode/machine.h

	Re: Non-UNIX Changes
		> Another thing that could be worth having in the filesystem might be a > return to "record-oriented" files.
		What record-oriented file can do what can't be done by 20 lines of cpp macros ?
		That is, having some semantics that > go beyond the UNIX notion of a file being a "bag of bytes." That way > the filesystem might support some structuring within the file.
	lists.debian.org /debian-hurd/2000/05/msg00154.html

	Diary for dalke
		All this data is record oriented and I have full access to the original data files (which may be compressed, so I wouldn't want to require access to the data to do the search).
		For example, every record may have the word "GENE" because that's part of the format definition, but I don't want a search for "gene" to return all records, or ignore all records because "gene" got put on a stop list.
		Ideally, simple lookups for some fields, like record identifier or aliases, should be blisteringly fast, while more complex keyword searches should be a fraction of a second.
	www.advogato.org /person/dalke/diary.html?start=24

	dBforums - Two questions about VA COBOL,one is for language,the other is for tool.
		with a record size as in the FD then the '39' status is telling you: "No it isn't".
		And could you please tell me which filesystem has been used on NT or AS/400.
		CR/LF record terminators and can be created by a text editor.
	www.dbforums.com /t422381.html

	[Metakit] newbie question - writing derived view back to db
		Yes, that is all STILL disk access and I'm aware of that - but either I do the 'memory mapping' manually in an extremely crude manner like by using SQL or reading BSDDB records, unpickling, analyzing, processing, pickling, etc, or I let smth like MK handle that for me - much more efficiently and economically.
		DBF/CSV/file reading functions/classes are oriented towards rows, not columns.
		So either some interface for dealing with that is developed or all those smart optimisations are misused and subsequently go down the drain like you described.
	www.equi4.com /pipermail/metakit/2005-January/001951.html

	COLUG Digest Archives
		The filesystem design is made to handle the bare minimum to allow choice in other areas.
		You can build records > > on top of byte streams, sure, but This is almost always implemented on top of byte streams anyway.
		> > > > Are you asserting that the Unix filesystem design is free from error?
	www.colug.net /cooked/v02.n323.html

	Server Oriented System Tuning Info
		With these file system options, a good raid setup, and the bdflush values, filesystem performace should be suffiecent.
		This page is about optimizing and tuning Linux based systems for server oriented tasks.
		The disk i/o elevators is another kernel tuneable that can be tweaked for improved disk i/o in some cases.
	people.redhat.com /alikins/system_tuning.html

	Exam - 15th April 1996
		Message queues are useful by being flow controlled, processed in first in first out fashion, record oriented, reliable and typed.
		Stream sockets support connection oriented communication that is sequenced, reliable, 2-way and flow controlled.
		They are not garbage collected when no longer referenced and are not known by names in the host's filesystem.
	www.cee.hw.ac.uk /~mjc/teaching/3ne3/13/ref97jun2.htm

	Linux Weekly News
		Of course, that track record was earned in part as a result of their willingness to accept the knocks they received for security problems after the release of their 5.X versions of Red Hat Linux and to dig in and produce the security fixes needed.
		The Zope Weekly News for this week contains some pointers to postings about "grand Zope visions", including comparisons between Object Oriented Programming and Zope and possibilities for web-objects, meta-data, XML, and Zope.
		On a more mundane level, Thomas Riedl is working on a Adabas database adapter and Martijn Pieters has provided a couple of patches, for a safe DTML range function, and an Internet Explorer bug workaround.
	lwn.net /1999/0415/bigpage.php3

	DbEnv.3
		.PP Each of the locking, logging, memory pool and transaction subsystems of Db require shared memory regions, backed by the filesystem.
		Further, cooperating applications (or multiple invocations of the same application) must agree on the location of the shared memory regions and other files used by the Db subsystems, the log files used by the logging subsystem, and, of course, the data files.
	hea-www.harvard.edu /MST/doc/man/man3/DbEnv.3

	Sn-Sz
		It was originally developed to handle digital speech recordings, although it has wider applications for general audio tasks and 1-D signals.
		It consists of an editor, an interpreter/compiler, a driver and an object oriented language.
		The language is complete, typed, structured, event driven and object oriented.
	stommel.tamu.edu /~baum/linuxlist/linuxlist/node44.html

	PETITION TO RETIRE FORTRAN
		Despite these innovations, FORTRAN maintains a record oriented sequential input/output model created for tape and punch cards.
		Today, secondary storage universally is direct access storage and in some instances a parallel filesystem.
		FORTRAN lacks any regular grammar, and "free format" syntax replaces rather than extends FORTRAN77 syntax, burdening users with knowing two subtly incompatible languages, both called FORTRAN, which can be combined almost arbitrarily.
	www.fortranstatement.com /cgi-bin/petition.pl

	MBR: Internet Bookwatch, September 2004
		McDaniel is a regular writer on the topic and Starrett also has produced numerous articles on CD recording technology: together they cover al the best software and hardware and don't neglect to mention the RIAA's pursuit of copiers and the legal implications.
		Chapters include an overview of FreeBSD's history, goals, and general design, and then delve into the nuts and bolts of its kernel services, process management, i/o system, network filesystem, network protocols, and much more.
		Zimbalist began his professional career at the age of nine, became a celebrity at 17 in a debut in Berlin, and became one of the century's greatest teachers of the instrument: Efrem Zimbalist: A Life covers all the nuances of his life and times.
	www.midwestbookreview.com /ibw/sep_04.htm

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Topic: Record oriented filesystem

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