dovecot: use Single-Instance Storage for mail attachments.

2 files changed, 6 insertions, 3 deletions

diff --git a/roles/IMAP/files/etc/cron.d/doveadm b/roles/IMAP/files/etc/cron.d/doveadm
new file mode 100644
index 0000000..1f1f139
--- /dev/null
+++ b/roles/IMAP/files/etc/cron.d/doveadm
@@ -0,0 +1,3 @@
+MAILTO=root
+
+7 5 * * *  vmail  test -x /usr/bin/doveadm && nice -n 19 /usr/bin/doveadm sis deduplicate /home/mail/attachments /home/mail/attachments/queue
diff --git a/roles/IMAP/files/etc/dovecot/conf.d/10-mail.conf b/roles/IMAP/files/etc/dovecot/conf.d/10-mail.conf
index ab5ceef..2e68df4 100644
--- a/roles/IMAP/files/etc/dovecot/conf.d/10-mail.conf
+++ b/roles/IMAP/files/etc/dovecot/conf.d/10-mail.conf
@@ -345,36 +345,36 @@ mailbox_list_index = yes
 #mdbox_rotate_size = 2M
 
 # Maximum dbox file age until it's rotated. Typically in days. Day begins
 # from midnight, so 1d = today, 2d = yesterday, etc. 0 = check disabled.
 #mdbox_rotate_interval = 0
 
 # When creating new mdbox files, immediately preallocate their size to
 # mdbox_rotate_size. This setting currently works only in Linux with some
 # filesystems (ext4, xfs).
 mdbox_preallocate_space = yes
 
 ##
 ## Mail attachments
 ##
 
 # sdbox and mdbox support saving mail attachments to external files, which
 # also allows single instance storage for them. Other backends don't support
 # this for now.
 
 # Directory root where to store mail attachments. Disabled, if empty.
-#mail_attachment_dir =
+mail_attachment_dir = /home/mail/attachments
 
 # Attachments smaller than this aren't saved externally. It's also possible to
 # write a plugin to disable saving specific attachments externally.
 #mail_attachment_min_size = 128k
 
 # Filesystem backend to use for saving attachments:
 #  posix : No SiS done by Dovecot (but this might help FS's own deduplication)
 #  sis posix : SiS with immediate byte-by-byte comparison during saving
 #  sis-queue posix : SiS with delayed comparison and deduplication
-#mail_attachment_fs = sis posix
+mail_attachment_fs = sis-queue /home/mail/attachments/queue:posix
 
 # Hash format to use in attachment filenames. You can add any text and
 # variables: %{md4}, %{md5}, %{sha1}, %{sha256}, %{sha512}, %{size}.
 # Variables can be truncated, e.g. %{sha256:80} returns only first 80 bits
-#mail_attachment_hash = %{sha1}
+mail_attachment_hash = %{sha256}