lkml.org 
[lkml]   [2000]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Tux 2 patents
On Sun, Oct 08, 2000 at 03:49:20PM +0000, John Alvord wrote:
> On Thu, 5 Oct 2000 22:00:58 +0000, Alain Williams <addw@phcomp.co.uk>
> wrote:
>
> >Hi,
> >
> >I remember when at the University of Cambridge (in England) about 25 years ago
> >seeing some work then about the Jackdaw (or was is Jackard) database system
> >that had the great feature of being immune to OS crashes, it used a phased
> >update mechanism where new blocks were written to disk and the last block
> >written was the one that contained the switched pointer, until this last block
> >had been written the changes had not been made. Since the write of a disk block
> >was atomic the database would never be corrupt.
> >
> >If someone wants I think that I still have a (paper) copy of the report describing
> >this. I can send/fax a copy if wanted.
> >
> >I don't subscribe to this list, so please reply direct if someone wants it.
> >
> >(Please don't request a copy just out of curiosity since I don't want to have
> >to post/fax copies that won't help resolve this case by showing prior art.)
> >
> >Cheers
>
> The VM/CMS operating system had a new file system around 1979 or 1980.
> It had exactly the same characteristics... writing the new blocks and
> then writing a final block which changed the world. The work was
> derived from Chris Stephens' work on YMS (Yorktown Monitor System).
> Since Chris was part of IBM Research, and since researchers got major
> brownie points from patents, I bet that the there are some patents to
> be found of interest.
>
> Clearly, the same idea has been rediscovered over and over again. The
> VM/CMS case would be a good example of prior art, since it had
> thousands of licenses and hundreds of thousands of end users in the
> early 1980s.
>
> john alvord

John,

Thanks. I'll forward this on.

Jeff

> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> Please read the FAQ at http://www.tux.org/lkml/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:39    [W:0.899 / U:0.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site