Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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1 $FreeBSD$ 2 3 Announcing the Availability of the 4 Coda Distributed 5 Filesystem 6 for 7 BSD Unix Systems 8 9 Coda is a distributed filesystem like NFS and AFS. It is 10 freely available, like NFS. But it functions much like AFS in being a 11 "stateful" filesystem. Coda and AFS cache files on your local 12 machine to improve performance. But Coda goes a step further than AFS 13 by letting you access the cached files when there is no available 14 network, viz. disconnected laptops and network outages. In Coda, both 15 the client and server are outside the kernel which makes them easier 16 to experiment with. 17 18 To get more information on Coda, I would like to refer people to 19 http://www.coda.cs.cmu.edu 20 There is a wealth of documents, papers, and theses there. There is 21 also a good introduction to the Coda File System in 22 http://www.coda.cs.cmu.edu/ljpaper/lj.html 23 24 Coda was originally developed as an academic prototype/testbed. It is 25 being polished and rewritten where necessary. Coda is a work in 26 progress and does have bugs. It is, though, very usable. Our 27 interest is in making Coda available to as many people as possible and 28 to have Coda evolve and flourish. 29 30 The bulk of the Coda filesystem code supports the Coda client 31 program, the Coda server program and the utilities needed by both. 32 All these programs are unix programs and can run equally well on any 33 Unix platform. Our main development thrust is improving these 34 programs. There is a small part of Coda that deals with the kernel to 35 filesystem interface. This code is OS specific (but should not be 36 platform specific). 37 38 Coda is currently available for several OS's and platforms: 39 Freebsd-2.2.5: i386 40 Freebsd-2.2.6: i386 41 Freebsd -current: i386 42 linux 2.0: i386 & sparc 43 linux 2.1: i386 & sparc 44 NetBSD 1.3: i386 45 NetBSD -current: i386 46 The relevant sources, binaries, and docs can be found in 47 ftp://ftp.coda.cs.cmu.edu/pub/coda/ 48 49 We intend to come out with new Coda releases often, not daily. We 50 don't want to slight any OS/platform not mentioned above. We are just 51 limited in our resources as to what we can support internally. We 52 will be happy to integrate OpenBSD support as well as other OS 53 support. Also, adding platform support should be relatively easy and 54 we can discuss this. The only difficulty is that Coda has a light weight 55 process package. It does some manipulations in assembler which would 56 have to be redone for a different platform. 57 58 There are several mailing lists @coda.cs.cmu.edu that discuss coda: 59 coda-announce and linux-coda. We are going to revise linux-coda to be 60 OS neutral, since it is mainly Coda we want to discuss. We appreciate 61 comments, feedback, bug reports, bug fixes, enhancements, etc. 62
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