Re: Ridiculous idea: Cache as ramdisk?

[Hiten Pandya <hmp@xxxxxxxxxxxxx>]

Matthew Dillon wrote:

> :Journalling file systems seem to be rather optimized for recovery, vs
> :the impression I get when I hear the word "journalling" - I think of
> :something more like CVS, where you can get any older version of a file
> :merely by requesting a different tag.  Such a "write once" filesystem
> :would be very nice to use, I think.
> :
> :Anyway... back to your regularly scheduled BSD forking...
> :
> :-Chris (in Vancouver, if you care)
>
>     There are major advantages to being able to access a filesystem
>     as of some date in the past.  For example, it makes 'undelete' work
>     very precisely.  Another huge advantage to a properly journaled
>     filesystem is that one can run a continuously streaming 'incremental
>     backup' of the filesystem as well as use such a stream to maintain a
>     fully independant off-site copy of the filesystem in near real time.

	Look no further, turn yourselves to The Elephant File System,
	``a file system that never forgets''.  Also, it seems to have
	been implemented on a FreeBSD 2.2 VFS implementation. 8-)

	I cannot find lots of information on this, but the following
	URL's should help:

	[1] - http://citeseer.nj.nec.com/santry99deciding.html
	[2] - Google ``The Elephant File System''

	Regards,

--
Hiten Pandya
hmp@xxxxxxxxxxxxx