Re: [opensuse] Undelete
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 El 2007-05-29 a las 12:59 +0100, Kevin Thorpe escribió: [You forgot to email to the list]
Carlos E. R. wrote:
I remember that. OOo also has this feature. What I talk about is different: it uses one file for each version, with a version field in the file name managed directly by the operating system, not the application program. It is also different from external backup, as it is automatic and continuous, and can be affected by disk failure, of course.
Novell NetWare did exactly that. Every time you saved a file it wrote a new copy and left the old one hidden in 'free' space on the hard drive. These old copies only got overwritten when the space was needed, in an oversized drive that seemed to be forever. A little utility allowed the administrator to retrieve old versions. Saved our bacon quite a number of times and I miss it badly.
Cute :-) Yes, that's the thing I'm talking about.
The nearest I've seen on Linux is subversion but that's a repository not a filesystem. I seem to remember coming across a subversion filesystem but it wasn't finished.
Pity. - -- Saludos Carlos E.R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFGXIfftTMYHG2NR9URAmnbAKCOfDbGeo3WPxK3wmC29orqm70D2QCfSAPx aByxq6wPMgL3FuZi/PcD2wU= =2LyU -----END PGP SIGNATURE-----
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Carlos E. R. wrote:
El 2007-05-29 a las 12:59 +0100, Kevin Thorpe escribió:
[You forgot to email to the list]
Carlos E. R. wrote:
I remember that. OOo also has this feature. What I talk about is different: it uses one file for each version, with a version field in the file name managed directly by the operating system, not the application program. It is also different from external backup, as it is automatic and continuous, and can be affected by disk failure, of course.
Novell NetWare did exactly that. Every time you saved a file it wrote a new copy and left the old one hidden in 'free' space on the hard drive. These old copies only got overwritten when the space was needed, in an oversized drive that seemed to be forever. A little utility allowed the administrator to retrieve old versions. Saved our bacon quite a number of times and I miss it badly.
Cute :-)
Yes, that's the thing I'm talking about.
The nearest I've seen on Linux is subversion but that's a repository not a filesystem. I seem to remember coming across a subversion filesystem but it wasn't finished.
Pity.
VMS if I remember correctly defaulted to 3 being available but the version numbers incremented (on the setup I was working one could flag files to be archived overnight and ask for them back later). Most editing applications I have dealt with create a backup copy by default so three versions is only a minor improvement. Yes Netware does this and it was great for short term file recovery. Netware still outperforms almost anything else as a secure file store and print server (It is damn near impossible to crack a properly configured Netware server). Not so good at some other server stuff unfortunately, and most definitely $$$ not OSS. I have looked at the idea of using Subversion for this purpose. Theoretically it should be possible to set up a background commit cycle, then use subversions dump mechanism to generate a dump of the latest revisions which then could be stored to wherever for backup purposes. (Already doing this in part for my coding projects). Unfortunately, the down side to this is that filestore can end up cluttered with an awful lot of unused data. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGXU/UasN0sSnLmgIRAikIAKCFsv7qkTqPpq7A6FFvr223mGYM6QCgp5lW 54ei2FKCoyby79WOKO9gxkE= =S1tD -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
G T Smith wrote:
VMS if I remember correctly defaulted to 3 being available but the version numbers incremented (on the setup I was working one could flag files to be archived overnight and ask for them back later). Most editing applications I have dealt with create a backup copy by default so three versions is only a minor improvement.
ICL's George 3 had this some 5-10 years before VMS (late 60s perhaps, definitely by early 70s). Files were version-numbered and George automatically saved them to tape and retrieved them as necessary, depending on disk availability (I remember using 8 MB disks the size of washing machines). It managed all the tape volumes, knowing just where every version of every file was. The filesystem also had user and group access control bits :) http://www.icl1900.co.uk/g3/filestor.html It's interesting watching people reinvent wheels over and over again. Cheers, Dave -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Dave Howorth wrote:
G T Smith wrote:
VMS if I remember correctly defaulted to 3 being available but the version numbers incremented (on the setup I was working one could flag files to be archived overnight and ask for them back later). Most editing applications I have dealt with create a backup copy by default so three versions is only a minor improvement.
ICL's George 3 had this some 5-10 years before VMS (late 60s perhaps, definitely by early 70s). Files were version-numbered and George automatically saved them to tape and retrieved them as necessary, depending on disk availability (I remember using 8 MB disks the size of washing machines). It managed all the tape volumes, knowing just where every version of every file was.
The filesystem also had user and group access control bits :)
http://www.icl1900.co.uk/g3/filestor.html
It's interesting watching people reinvent wheels over and over again.
Or make stone wheels, then have to spend years chipping away at them to replace the parts with wood. Then do the same again to replace parts with steel (while some of the original stone is retained for backward compatibility). -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Wednesday 30 May 2007 06:29, Dave Howorth wrote:
...
It's interesting watching people reinvent wheels over and over again.
I think you confuse invention with design and / or fabrication.
Cheers, Dave
Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (5)
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Carlos E. R. -
Dave Howorth -
G T Smith -
Randall R Schulz -
Russell Jones