rsync dir in _both_ directions?
jackmc-rsync at lorentz.com
Wed Feb 6 14:09:45 EST 2002
Big Brother tells me that Dave Dykstra wrote:
> On Mon, Feb 04, 2002 at 11:58:04AM -0600, Jack McKinney wrote:
> > If I change the status on the first message in the box (reply to it, delete
> > it), then the ENTIRE mailbox is re-copied. Not so in maildir format.
> Are you sure about that? Rsync is able to locate identical blocks that
> are in a different position.
Yes. blocks are 512 bytes long. If I add a 14 byte header on a message
near the beginning, then there are no identical blocks.
> No there isn't. What's wrong with doing it in two commands?
It can take 5-30 minutes to finish the first, and I want it to then
start the second one without having to watch for the first one. I prefer
not to use ssh's feature to remember keys or to use .rhosts/.shosts.
> You may be interested in
> which is explicitly designed to sync mailboxes.
This is designed for long mbox-format boxes. Maildirs obviate the
need for it, except when you modify a rather long single message, in
which case mailsync is useful. OTOH, though it is designed to solve a
different problem, it may indirectly solve the both directions problem,
for this specific case. I have other data (some binary) that I want to
sync in the same way, though.
"There are two kinds of people in Jack McKinney
this world: Those with loaded guns, jackmc at lorentz.com
and those who dig." http://www.lorentz.com
-The Good, The Bad, and The Ugly
2002 Chicago Cubs magic number: 163
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