High availability email server...

[Wesley Craig]

On 02 Aug 2006, at 03:24, Daniel Eckl wrote:
> Well, as far as I know, the mailboxes.db and other databases are  
> only opened and modified by the master process.

That's not the case.

:; grep -lw mboxlist_open *[ch]
arbitron.c
chk_cyrus.c
ctl_cyrusdb.c
ctl_mboxlist.c
cyr_expire.c
cyrdump.c
fud.c
idled.c
imapd.c
ipurge.c
lmtpd.c
make_md5.c
mbexamine.c
mboxlist.c
mboxlist.h
mbpath.c
mupdate.c
nntpd.c
pop3d.c
quota.c
reconstruct.c
smmapd.c
squatter.c
sync_client.c
sync_reset.c
sync_server.c
unexpunge.c
:;

So at least imapd, lmtpd, pop3d, and mupdate directly access  
mailboxes.db.  And further, master never accesses mailboxes.db.

:wes