> Mail is always a random IO workload, unless your mailbox count is 1, > whether accessing indexes or mail files. Regarding the other two > questions, you'll likely need to take your own measurements.
Wait, maybe there is a misunderstanding. I mean the IO inside one index file, not across the different mailboxes. So within 1 index file that covers a mailbox with say 10.000 emails, how does the IO occur. I would guess pretty random as well, but on the other hand i guess in some ways it could be pretty linear too. If dovecot keeps most changes in memory and writes it all back in 1 go. Cor
