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