[Dovecot] dsync is SLOW compared to rsync

[Timo Sirainen]

On 22.3.2012, at 23.25, Jeff Gustafson wrote:

> [root at n24 bu]# time dsync backup -u testuser at domain.com \
> mdbox:/home/bu/testuser
> 
> real    1m9.519s
> user    1m7.592s
> sys     0m1.126s

Most of the time is spent on usermode CPU code. I doubt the problem is dsync itself, most likely the problem is mdbox's saving code. Or possibly index/cache code. Try the same dsync backup for:

 - mbox:/tmp/mbox
 - mbox:/tmp/mbox:INDEX=MEMORY
 - sdbox:/tmp/sdbox