[Dovecot] dsync is SLOW compared to rsync

[Jeff Gustafson]

On Fri, 2012-03-23 at 19:02 +0100, Christoph Bußenius wrote:
> Hi,
> 
> maybe try "dsync -o mail_fsync=never".

	That didn't seem to make much of a difference. On a 3.1GB backup it
shaved off 5 seconds. dsync's time was over 6 minutes with or without
the mail_fsync=never. rsync copied the same 3.1GB mailbox in 15 seconds.
	It seems to me that dsync *should* be able to be just as fast, but it
currently is spending way too much time doing something. What is it?
				...Jeff