[Dovecot] Migration from v1 to v2 with hashed directory structure

[Pavel Dimow]

Hi,

I want to upgrade to version 2 but I would like to solve a long
standing problem with 'flat' directory structure ie
 we have /var/spool/vmail/mydomain.com/user at mydomain.com and I want a
new server with version 2 to have
hashed directory structure like /var/spool/vmail/mydomain.com/u/s/user
I was wondering it f there is some better solution then dir hashing or
a way to hash a dir other then first two letters.
Also any suggestion how to perform this migration from old to new
server with hashing on the fly?

Thanks in advance.