emacs internal RAID?

emacs internal RAID?

[Dan Jacobson]

Emacs (probably doesn't) need a mode to associate one buffer to two
files at once. But just to be inventive, it could add such a mode.

E.g., the user is worried that some impending doom will happen, so he
wants to write to a USB card and a local file at the same time, from
the same buffer. Auto saving and all.

He won't have time to copy the file to the second medium when the doom
hits, and he doesn't have RAID or whatever.

OK, never mind. Probably little used.

Re: emacs internal RAID?

[Reiner Steib]

On Thu, Feb 16 2006, Dan Jacobson wrote:

> E.g., the user is worried that some impending doom will happen, so he
> wants to write to a USB card and a local file at the same time, from
> the same buffer. Auto saving and all.

Some addition (see `copy-file') to `write-file-functions' (or
`write-file-hooks') would do this.

Bye, Reiner.
-- 
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Re: emacs internal RAID?

[Mark Plaksin]

Dan Jacobson <jidanni@jidanni.org> writes:

> Emacs (probably doesn't) need a mode to associate one buffer to two
> files at once. But just to be inventive, it could add such a mode.

This would be very cool!

> E.g., the user is worried that some impending doom will happen, so he
> wants to write to a USB card and a local file at the same time, from
> the same buffer. Auto saving and all.

Or the user is very paranoid about losing work and wants to write
everything to the local machine and a remote machine via TRAMP.

> OK, never mind. Probably little used.

Probably so but if it were trivial to make all (or a subset matching a
regexp) of your files get saved in multiple places I'd use it.

It would be nice if the second write could optionally be made asynchronous.
That way you wouldn't have to wait if your remote connection was slow.
Perhaps something in the mode line could tell you whether your second copy
is up-to-date or not; for example, display '-*' if only the local copy is
up-to-date.