[OpenAFS-devel] Re: safe dropboxing in an anonymous world

[Andrew Deason]

On Mon, 7 Feb 2011 19:50:40 +0000
Simon Wilkinson <sxw@inf.ed.ac.uk> wrote:

> On 7 Feb 2011, at 19:42, Derrick Brashear wrote:
> 
> > I believe it to be possible but unlikely.
> 
> It's also not possible to fix it just by changing the client behaviour
> to only write dirty bytes (rather than dirty chunks) to the server. On
> Linux, for example, we'll always write and read full pages. So, if you
> were to write bytes 16-31, the kernel would ask AFS to read bytes
> 0->4095 into memory, before performing the write. If you don't have
> that page locally, then you would lose.

Well, shoot. Scratch that, then. But even then, I agree that that alone
is not a reason not to do this. Just something to make people aware of
for whatever release (or something that is configurable, if someone
cares enough about it, but I'd expect not).

-- 
Andrew Deason
adeason@sinenomine.net