Hi,
the mailbox quota is used to restrict the user's mailbox size. This type
of archiving you used does not alter the user's mailbox size in any way.
All messages remain in the same mailbox (from the IMAP point of view),
even though physically they reside in different paths/filesystems. If
you wanted to actually reduce the mailbox size, messages should actually
be moved out of the mailbox that has the quota.
Note that if you specify a root quota for the user, no matter in which
IMAP folder the messages are moved, they would still count and the usage
will still be the same. In that case the archived messages should
actually be removed from the mail server in oder to matter for the quota.
Now to understand the purpose of the archive partitions, you should read
the related documentation
(https://www.cyrusimap.org/imap/reference/admin/locations.html#archive-partitions
and
https://www.cyrusimap.org/imap/concepts/features/mail-spool-partitions.html#restricting-storage-used-with-partitions).
It only has to do with *disk space* management. For example, if you have
an expensive 1 TB SSD disk as your main storage, and an additional 4TB
of non SSD storage, this is the perfect scenario to use this archiving
feature. Old messages are moved from the limited space in the fast SSD
disk to the other disk where you have plenty, cheaper space. Access to
these files will be slower, but because they are older messages that are
rarely used it won't really matter.
As you understand mailbox quota has nothing to do with the above
scenario. Messages moved between partitions is practically seamless to
the user. He still sees all his messages in the same mailbox. That's
also why the usage doesn't change...
Regards,
Savvas Karagiannidis
On 30/4/2025 09:01, Chittaranjan via Info wrote:
Dear Bron,
Thanks for respond.
My problem is that when I archived the oldest mails to different
partition using cyr_expire (/usr/lib/cyrus/bin/cyr_expire -A 7d) it
is working and oldest mails are moving to secondary partition.
But after move of all older emails to secondary(slow) partition,
primary(fast) mailbox quota are not reducing.
Is it the write process i have configured below or any other process
need to follow? please guide....
defaultpartition: main
partition-main: /var/spool/cyrus/fast
archive_enabled: yes
archivepartition-main: /var/spool/cyrusarchive/slow
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