[Dovecot] dbox redesign

[Timo Sirainen]

On Wed, 2009-02-11 at 17:35 -0500, Timo Sirainen wrote:
> On Wed, 2009-02-11 at 14:32 -0800, Seth Mattinen wrote:
> > Timo Sirainen wrote:
> > > This is about how to implement multiple msgs/file dbox format. The
> > > current v1.1's one msg/file design would stay pretty much the same and
> > > it would be compatible with this new design.
> > > 
> > 
> > Out of curiosity, what's the advantage to going to multiple messages per
> > file? Wouldn't this have the same problems as mbox?
> 
> Multiple per file, not everything in one file. As long as the file size
> is set "right", it's probably faster than one per file. We'll see :)

Also there are no locking issues since reading doesn't require locking
and write locks are very short lived. Corruption isn't possible because
data is never copied within a file. A crash can happen at any point and
Dovecot will be able to recover from it 100%. The worst that can happen
is that some extra garbage is left lying around for some time wasting
disk space.

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