Re: FileSystem Question

Hi Sam,

On 6/30/07, Sam Leon <leon.mailinglist.36@gmail.com> wrote:

ext3cow does this but it is not in debian repos for some reason....
>
> http://linux.slashdot.org/article.pl?sid=07/05/02/0413253

Thanks for the link. I checked out ext3cow, but taking snapshots is not exactly what I meant. SFS takes no snapshots. It sort of backs up all files I save. IE: it does not overwrite an existing file, but creates

a new file every time I save it. The old file will be renamed and moved to the .recycled directory. So this is much less overhead than creating snapshots from time to time.

1. First save of ~/my_doc
2. Second save of ~/my_doc The existing ~/my_doc is moved to ~/.recycled/my_doc ~/my_doc is saved to another part of the hd
3. Third save of ~/my_doc The existing ~/my_doc is moved/as to ~/.recycled/my_doc$AAA ~/my_doc is saved to another part of the hd
4. Fourth save of ~/my_doc The existing ~/my_doc is moved/as to ~/.recycled/my_doc$AAB ~/my_doc is saved to yet another part of the hd etc.

At this point there exist four copies of my_doc:

three in ~/.recycled

my_doc
my_doc$AAA
my_doc$AAB

and one in ~
my_doc

Do you need help?

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All this only occurs when I save some file. No snapshots. Besides that, .recycled only allows file read access and deletion, no modification of files. SFS takes care of all this. I don't have to think of it at all. It only comes in handy if I want to recover some data.

Manon.

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