Re: [9fans] FS to skip/put-together duplicate files

[erik quanstrom <quanstro@quanstro.net>]

> I'm host a lot of web applications which share 99% of their code.
> Disk space is not the issue, but bandwidth on remote backup. 
> So my idea is to let an filesystem automatically link together
> equal files in the storage, but present them as separate ones.
> Once an file gets changed, it will be unlinked/copied automatically.
> 
> Is there already such an filesystem ?

no.

however there are updatedb/compactdb which can be used to
create a list of changed files and replica/applylog which can
be used to apply them.

i used these tools to copy history from one kenfs to a new one.
i actually used cphist (/n/sources/patch/saved/cphist) and not
applylog.

you could also use the log on the generating machine to build
a mkfs archive and compress that, ftp it and apply it on the
other end.

- erik