Using non-default folder structures

[Marten Lehmann]

Hello,

in our current maildir setup, we splitted the maildirs according to the first
two letters, which gives more performance to the filesystem since less entries
are in one directory.

Example: Mails to info at test.com would be stored into

/var/spool/mail/t/te/test.com/info

How can I do this with Cyrus? Do I have to create a partition for each
combination of the first two letters?

Like

/var/spool/mail/a/aa
/var/spool/mail/a/ab
/var/spool/mail/a/ac
/var/spool/mail/a/ad
/var/spool/mail/a/ae
...

?

Also, we are treating subdomains differently, so a mail to info at mail.test.com
would be stored to

/var/spool/mail/t/te/test.com/mail/info

while a mail to info at test.com would be stored to

/var/spool/mail/t/te/test.com/_/info

("_" is our "empty" subdomain)

Can I keep this structure with Cyrus (of course I cannot keep the
Maildir-directory and its content itself, I will use imapsync instead).

Regards
Marten