29 Mar
2012
29 Mar
'12
2:51 a.m.
On Thu, 2012-03-29 at 02:12 +0300, Timo Sirainen wrote:
On 22.3.2012, at 23.25, Jeff Gustafson wrote:
[root@n24 bu]# time dsync backup -u testuser@domain.com
mdbox:/home/bu/testuserreal 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
My tests show that maildir to mdbox or sdbox backup/conversions takeabout the same length in time. I noticed maybe a second or two difference between mdbox and sdbox). On a 3.1GB mailbox either one took about 6 minutes. Rsync, on the other hand, took less than a minute. I will re-run the tests with a maildir to maildir backup and see how long it takes.
...Jeff