Will Dovecot be negatively impacted if I change my XFS mount options to noatime,nodiratime?
How are the mails stored on your XFS filesystem? For Maildir, there is no problem using these mount options. I'm using
noatime,nodiratime,nobarrier,logbufs=8for mounting XFS filesystems on all my dovecot servers for years without any problems. Mailstorage is Maildir (written by exim not dovecot lda but this should not matter).
nobarrier is enabled because I use RAID systems with battery backed write cache.
logbufs=8 does increase performace for deleting mails (e.g. for expiring the Spam folder) if XFS log is internal (the default). If you have configured a separate, external partion for XFS log, this might not be necessary.
Heiko
Heiko Schlichting Freie Universität Berlin heiko.schlichting@fu-berlin.de Zentraleinrichtung für Datenverarbeitung Telefon +49 30 838-54327 Fabeckstraße 32 Telefax +49 30 838454327 14195 Berlin