dovecot separate INDEX and CONTROL size space
I would like to test a new dovecot installation with separate INDEX and CONTROL files, meaning that they are are not stored in user's home directory and taking space from their quota, but in separate no-quota directories, like this:
mail_location = maildir:~/Maildir:INDEX=/var/cache/dovecot/index/%u:CONTROL=/var/cache/dovecot/control/%u
If /var/cache/dovecot is a separate partition, what size should it be? For lets say 1000 users on the system, each with 100MB inbox file (average). I can't make an estimate of an average message count, I guess that would be more helpful.
Or how much space does one entry in INDEX and CONTROL file take for 1 mail message? And I'll do the calculation with more detailed data...
Thank you in advance!