Hmmm, but I have made a few files with accounts to sync, if I use the list with the oldest least changing mailaccounts I get this spike during the doveadm backup. And if I issue the same command 30s later, the spike is back for the duration of the check. And since it was finished quite quickly, ran it for a third time, again the write spike.

doveadm backup -n inbox -F /root/backup-old-60-accounts.txt tcp:mail04.local:542

[@mail]# rpm -qa | grep dovecot dovecot-pigeonhole-2.2.36-6.el7_8.1.x86_64 dovecot-2.2.36-6.el7_8.1.x86_64

-----Original Message----- From: Aki Tuomi [mailto:aki.tuomi@open-xchange.com] Sent: 22 December 2020 09:52 To: Marc Roos; dovecot Subject: Re: doveadm backup -f -n inbox doing writes?

On 22/12/2020 00:12 Marc Roos m.roos@f1-outsourcing.eu wrote:

If I start a 'doveadm backup -f -n inbox' on the source server, why do

also disk writes increase on the source server (indexes mostly?)

Probably because your indexes are not up to date?

Aki